Merge branch 'master' into great_line_ending_and_cursor_range_cleanup

37 files changed, 1495 insertions, 361 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 473ae8c8..2cd202f3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -317,10 +317,12 @@ dependencies = [
  "etcetera",
  "helix-syntax",
  "once_cell",
+ "quickcheck",
  "regex",
  "ropey",
  "rust-embed",
  "serde",
+ "similar",
  "smallvec",
  "tendril",
  "toml",
@@ -394,7 +396,6 @@ dependencies = [
  "helix-view",
  "serde",
  "unicode-segmentation",
- "unicode-width",
 ]
 
 [[package]]
@@ -693,6 +694,15 @@ dependencies = [
 ]
 
 [[package]]
+name = "quickcheck"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "588f6378e4dd99458b60ec275b4477add41ce4fa9f64dcba6f15adccb19b50d6"
+dependencies = [
+ "rand",
+]
+
+[[package]]
 name = "quote"
 version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -702,6 +712,24 @@ dependencies = [
 ]
 
 [[package]]
+name = "rand"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e7573632e6454cf6b99d7aac4ccca54be06da05aca2ef7423d22d27d4d4bcd8"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
 name = "redox_syscall"
 version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -873,6 +901,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "similar"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ad1d488a557b235fc46dae55512ffbfc429d2482b08b4d9435ab07384ca8aec"
+
+[[package]]
 name = "slab"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/book/src/keymap.md b/book/src/keymap.md
index 0265fe6d..c0c455d3 100644
--- a/book/src/keymap.md
+++ b/book/src/keymap.md
@@ -73,6 +73,7 @@
 | `Alt-;`  | Flip selection cursor and anchor                                  |
 | `%`      | Select entire file                                                |
 | `x`      | Select current line, if already selected, extend to next line     |
+| `X`      | Extend selection to line bounds (line-wise selection)             |
 |          | Expand selection to parent syntax node TODO: pick a key           |
 | `J`      | join lines inside selection                                       |
 | `K`      | keep selections matching the regex TODO: overlapped by hover help |
@@ -150,7 +151,8 @@ Jumps to various locations.
 ## Match mode
 
 Enter this mode using `m` from normal mode. See the relavant section
-in [Usage](./usage.md#surround) for an explanation about surround usage.
+in [Usage](./usage.md) for an explanation about [surround](./usage.md#surround)
+and [textobject](./usage.md#textobject) usage.
 
 | Key              | Description                                     |
 | -----            | -----------                                     |
@@ -158,6 +160,8 @@ in [Usage](./usage.md#surround) for an explanation about surround usage.
 | `s` `<char>`     | Surround current selection with `<char>`        |
 | `r` `<from><to>` | Replace surround character `<from>` with `<to>` |
 | `d` `<char>`     | Delete surround character `<char>`              |
+| `a` `<object>`   | Select around textobject                        |
+| `i` `<object>`   | Select inside textobject                        |
 
 ## Object mode
 
diff --git a/book/src/themes.md b/book/src/themes.md
index d6ed78ba..e5c461fd 100644
--- a/book/src/themes.md
+++ b/book/src/themes.md
@@ -81,6 +81,7 @@ Possible keys:
 | `ui.cursor.match`        | Matching bracket etc.               |
 | `ui.cursor.primary`      | Cursor with primary selection       |
 | `ui.linenr`              |                                     |
+| `ui.linenr.selected`     |                                     |
 | `ui.statusline`          |                                     |
 | `ui.statusline.inactive` |                                     |
 | `ui.popup`               |                                     |
diff --git a/book/src/usage.md b/book/src/usage.md
index e6bd60e2..0458071a 100644
--- a/book/src/usage.md
+++ b/book/src/usage.md
@@ -24,3 +24,19 @@ It can also act on multiple seletions (yay!). For example, to change every occur
 - `mr([` to replace the parens with square brackets
 
 Multiple characters are currently not supported, but planned.
+
+## Textobjects
+
+Currently supported: `word`, `surround`.
+
+![textobject-demo](https://user-images.githubusercontent.com/23398472/124231131-81a4bb00-db2d-11eb-9d10-8e577ca7b177.gif)
+
+- `ma` - Select around the object (`va` in vim, `<alt-a>` in kakoune)
+- `mi` - Select inside the object (`vi` in vim, `<alt-i>` in kakoune)
+
+| Key after `mi` or `ma` | Textobject selected      |
+| ---                    | ---                      |
+| `w`                    | Word                     |
+| `(`, `[`, `'`, etc     | Specified surround pairs |
+
+Textobjects based on treesitter, like `function`, `class`, etc are planned.
diff --git a/helix-core/Cargo.toml b/helix-core/Cargo.toml
index 726e90cc..80d559a9 100644
--- a/helix-core/Cargo.toml
+++ b/helix-core/Cargo.toml
@@ -31,5 +31,10 @@ regex = "1"
 serde = { version = "1.0", features = ["derive"] }
 toml = "0.5"
 
+similar = "1.3"
+
 etcetera = "0.3"
 rust-embed = { version = "5.9.0", optional = true }
+
+[dev-dependencies]
+quickcheck = { version = "1", default-features = false }
diff --git a/helix-core/src/diff.rs b/helix-core/src/diff.rs
new file mode 100644
index 00000000..9c1fc999
--- /dev/null
+++ b/helix-core/src/diff.rs
@@ -0,0 +1,70 @@
+use ropey::Rope;
+
+use crate::{Change, Transaction};
+
+/// Compares `old` and `new` to generate a [`Transaction`] describing
+/// the steps required to get from `old` to `new`.
+pub fn compare_ropes(old: &Rope, new: &Rope) -> Transaction {
+    // `similar` only works on contiguous data, so a `Rope` has
+    // to be temporarily converted into a `String`.
+    let old_converted = old.to_string();
+    let new_converted = new.to_string();
+
+    // A timeout is set so after 1 seconds, the algorithm will start
+    // approximating. This is especially important for big `Rope`s or
+    // `Rope`s that are extremely dissimilar to each other.
+    //
+    // Note: Ignore the clippy warning, as the trait bounds of
+    // `Transaction::change()` require an iterator implementing
+    // `ExactIterator`.
+    let mut config = similar::TextDiff::configure();
+    config.timeout(std::time::Duration::from_secs(1));
+
+    let diff = config.diff_chars(&old_converted, &new_converted);
+
+    // The current position of the change needs to be tracked to
+    // construct the `Change`s.
+    let mut pos = 0;
+    let changes: Vec<Change> = diff
+        .ops()
+        .iter()
+        .map(|op| op.as_tag_tuple())
+        .filter_map(|(tag, old_range, new_range)| {
+            // `old_pos..pos` is equivalent to `start..end` for where
+            // the change should be applied.
+            let old_pos = pos;
+            pos += old_range.end - old_range.start;
+
+            match tag {
+                // Semantically, inserts and replacements are the same thing.
+                similar::DiffTag::Insert | similar::DiffTag::Replace => {
+                    // This is the text from the `new` rope that should be
+                    // inserted into `old`.
+                    let text: &str = {
+                        let start = new.char_to_byte(new_range.start);
+                        let end = new.char_to_byte(new_range.end);
+                        &new_converted[start..end]
+                    };
+                    Some((old_pos, pos, Some(text.into())))
+                }
+                similar::DiffTag::Delete => Some((old_pos, pos, None)),
+                similar::DiffTag::Equal => None,
+            }
+        })
+        .collect();
+    Transaction::change(old, changes.into_iter())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    quickcheck::quickcheck! {
+        fn test_compare_ropes(a: String, b: String) -> bool {
+            let mut old = Rope::from(a);
+            let new = Rope::from(b);
+            compare_ropes(&old, &new).apply(&mut old);
+            old.to_string() == new.to_string()
+        }
+    }
+}
diff --git a/helix-core/src/lib.rs b/helix-core/src/lib.rs
index dfbbd748..3684a93e 100644
--- a/helix-core/src/lib.rs
+++ b/helix-core/src/lib.rs
@@ -2,6 +2,7 @@ pub mod auto_pairs;
 pub mod chars;
 pub mod comment;
 pub mod diagnostic;
+pub mod diff;
 pub mod graphemes;
 pub mod history;
 pub mod indent;
@@ -17,6 +18,7 @@ pub mod selection;
 mod state;
 pub mod surround;
 pub mod syntax;
+pub mod textobject;
 mod transaction;
 
 pub mod unicode {
diff --git a/helix-core/src/movement.rs b/helix-core/src/movement.rs
index 62311ee4..bc56f9a4 100644
--- a/helix-core/src/movement.rs
+++ b/helix-core/src/movement.rs
@@ -176,6 +176,10 @@ pub fn move_prev_long_word_start(slice: RopeSlice, range: Range, count: usize) -
     word_move(slice, range, count, WordMotionTarget::PrevLongWordStart)
 }
 
+pub fn move_prev_word_end(slice: RopeSlice, range: Range, count: usize) -> Range {
+    word_move(slice, range, count, WordMotionTarget::PrevWordEnd)
+}
+
 fn word_move(slice: RopeSlice, range: Range, count: usize, target: WordMotionTarget) -> Range {
     (0..count).fold(range, |range, _| {
         slice.chars_at(range.head).range_to_target(target, range)
@@ -222,6 +226,7 @@ pub enum WordMotionTarget {
     NextWordStart,
     NextWordEnd,
     PrevWordStart,
+    PrevWordEnd,
     // A "Long word" (also known as a WORD in vim/kakoune) is strictly
     // delimited by whitespace, and can consist of punctuation as well
     // as alphanumerics.
@@ -244,7 +249,9 @@ impl CharHelpers for Chars<'_> {
     fn range_to_target(&mut self, target: WordMotionTarget, origin: Range) -> Range {
         // Characters are iterated forward or backwards depending on the motion direction.
         let characters: Box<dyn Iterator<Item = char>> = match target {
-            WordMotionTarget::PrevWordStart | WordMotionTarget::PrevLongWordStart => {
+            WordMotionTarget::PrevWordStart
+            | WordMotionTarget::PrevLongWordStart
+            | WordMotionTarget::PrevWordEnd => {
                 self.next();
                 Box::new(from_fn(|| self.prev()))
             }
@@ -253,9 +260,9 @@ impl CharHelpers for Chars<'_> {
 
         // Index advancement also depends on the direction.
         let advance: &dyn Fn(&mut usize) = match target {
-            WordMotionTarget::PrevWordStart | WordMotionTarget::PrevLongWordStart => {
-                &|u| *u = u.saturating_sub(1)
-            }
+            WordMotionTarget::PrevWordStart
+            | WordMotionTarget::PrevLongWordStart
+            | WordMotionTarget::PrevWordEnd => &|u| *u = u.saturating_sub(1),
             _ => &|u| *u += 1,
         };
 
@@ -328,7 +335,7 @@ fn reached_target(target: WordMotionTarget, peek: char, next_peek: Option<&char>
     };
 
     match target {
-        WordMotionTarget::NextWordStart => {
+        WordMotionTarget::NextWordStart | WordMotionTarget::PrevWordEnd => {
             is_word_boundary(peek, *next_peek)
                 && (char_is_line_ending(*next_peek) || !next_peek.is_whitespace())
         }
@@ -979,6 +986,88 @@ mod test {
     }
 
     #[test]
+    fn test_behaviour_when_moving_to_end_of_previous_words() {
+        let tests = array::IntoIter::new([
+            ("Basic backward motion from the middle of a word",
+                vec![(1, Range::new(9, 9), Range::new(9, 5))]),
+            ("Starting from after boundary retreats the anchor",
+                vec![(1, Range::new(0, 13), Range::new(12, 8))]),
+            ("Jump     to end of a word succeeded by whitespace",
+                vec![(1, Range::new(10, 10), Range::new(10, 4))]),
+            ("    Jump to start of line from end of word preceded by whitespace",
+                vec![(1, Range::new(7, 7), Range::new(7, 0))]),
+            ("Previous anchor is irrelevant for backward motions",
+                vec![(1, Range::new(26, 12), Range::new(12, 8))]),
+            ("    Starting from whitespace moves to first space in sequence",
+                vec![(1, Range::new(0, 3), Range::new(3, 0))]),
+            ("Test identifiers_with_underscores are considered a single word",
+                vec![(1, Range::new(0, 25), Range::new(25, 4))]),
+            ("Jumping\n    \nback through a newline selects whitespace",
+                vec![(1, Range::new(0, 13), Range::new(11, 8))]),
+            ("Jumping to start of word from the end selects the whole word",
+                vec![(1, Range::new(15, 15), Range::new(15, 10))]),
+            ("alphanumeric.!,and.?=punctuation are considered 'words' for the purposes of word motion",
+                vec![
+                    (1, Range::new(30, 30), Range::new(30, 21)),
+                    (1, Range::new(30, 21), Range::new(20, 18)),
+                    (1, Range::new(20, 18), Range::new(17, 15))
+                ]),
+
+            ("...   ... punctuation and spaces behave as expected",
+                vec![
+                    (1, Range::new(0, 10), Range::new(9, 9)),
+                    (1, Range::new(9, 6), Range::new(5, 3)),
+                ]),
+            (".._.._ punctuation is not joined by underscores into a single block",
+                vec![(1, Range::new(0, 5), Range::new(4, 3))]),
+            ("Newlines\n\nare bridged seamlessly.",
+                vec![
+                    (1, Range::new(0, 10), Range::new(7, 0)),
+                ]),
+            ("Jumping    \n\n\n\n\nback from within a newline group selects previous block",
+                vec![
+                    (1, Range::new(0, 13), Range::new(10, 7)),
+                ]),
+            ("Failed motions do not modify the range",
+                vec![
+                    (0, Range::new(3, 0), Range::new(3, 0)),
+                ]),
+            ("Multiple motions at once resolve correctly",
+                vec![
+                    (3, Range::new(23, 23), Range::new(15, 8)),
+                ]),
+            ("Excessive motions are performed partially",
+                vec![
+                    (999, Range::new(40, 40), Range::new(8, 0)),
+                ]),
+            ("", // Edge case of moving backwards in empty string
+                vec![
+                    (1, Range::new(0, 0), Range::new(0, 0)),
+                ]),
+            ("\n\n\n\n\n", // Edge case of moving backwards in all newlines
+                vec![
+                    (1, Range::new(0, 0), Range::new(0, 0)),
+                ]),
+            ("   \n   \nJumping back through alternated space blocks and newlines selects the space blocks",
+                vec![
+                    (1, Range::new(0, 7), Range::new(6, 4)),
+                    (1, Range::new(6, 4), Range::new(2, 0)),
+                ]),
+            ("Test ヒーリクス multibyte characters behave as normal characters",
+                vec![
+                    (1, Range::new(0, 9), Range::new(9, 4)),
+                ]),
+        ]);
+
+        for (sample, scenario) in tests {
+            for (count, begin, expected_end) in scenario.into_iter() {
+                let range = move_prev_word_end(Rope::from(sample).slice(..), begin, count);
+                assert_eq!(range, expected_end, "Case failed: [{}]", sample);
+            }
+        }
+    }
+
+    #[test]
     fn test_behaviour_when_moving_to_end_of_next_long_words() {
         let tests = array::IntoIter::new([
             ("Basic forward motion from the start of a word to the end of it",
diff --git a/helix-core/src/selection.rs b/helix-core/src/selection.rs
index 6ca798a6..64ff51d8 100644
--- a/helix-core/src/selection.rs
+++ b/helix-core/src/selection.rs
@@ -216,6 +216,16 @@ impl Range {
     }
 }
 
+impl From<(usize, usize)> for Range {
+    fn from(tuple: (usize, usize)) -> Self {
+        Self {
+            anchor: tuple.0,
+            head: tuple.1,
+            horiz: None,
+        }
+    }
+}
+
 /// A selection consists of one or more selection ranges.
 /// invariant: A selection can never be empty (always contains at least primary range).
 #[derive(Debug, Clone, PartialEq, Eq)]
diff --git a/helix-core/src/surround.rs b/helix-core/src/surround.rs
index 61981d6e..52f60cab 100644
--- a/helix-core/src/surround.rs
+++ b/helix-core/src/surround.rs
@@ -41,11 +41,14 @@ pub fn find_nth_pairs_pos(
     let (open, close) = get_pair(ch);
 
     let (open_pos, close_pos) = if open == close {
-        // find_nth* do not consider current character; +1/-1 to include them
-        (
-            search::find_nth_prev(text, open, pos + 1, n, true)?,
-            search::find_nth_next(text, close, pos - 1, n, true)?,
-        )
+        let prev = search::find_nth_prev(text, open, pos, n, true);
+        let next = search::find_nth_next(text, close, pos, n, true);
+        if text.char(pos) == open {
+            // cursor is *on* a pair
+            next.map(|n| (pos, n)).or_else(|| prev.map(|p| (p, pos)))?
+        } else {
+            (prev?, next?)
+        }
     } else {
         (
             find_nth_open_pair(text, open, close, pos, n)?,
@@ -198,6 +201,11 @@ mod test {
         assert_eq!(find_nth_pairs_pos(slice, '\'', 13, 1), Some((10, 15)));
         assert_eq!(find_nth_pairs_pos(slice, '\'', 13, 2), Some((4, 21)));
         assert_eq!(find_nth_pairs_pos(slice, '\'', 13, 3), Some((0, 27)));
+        // cursor on the quotes
+        assert_eq!(find_nth_pairs_pos(slice, '\'', 10, 1), Some((10, 15)));
+        // this is the best we can do since opening and closing pairs are same
+        assert_eq!(find_nth_pairs_pos(slice, '\'', 0, 1), Some((0, 4)));
+        assert_eq!(find_nth_pairs_pos(slice, '\'', 27, 1), Some((21, 27)));
     }
 
     #[test]
diff --git a/helix-core/src/syntax.rs b/helix-core/src/syntax.rs
index d4379a8e..84a5f9bd 100644
--- a/helix-core/src/syntax.rs
+++ b/helix-core/src/syntax.rs
@@ -94,6 +94,7 @@ fn load_runtime_file(language: &str, filename: &str) -> Result<String, std::io::
 #[cfg(feature = "embed_runtime")]
 fn load_runtime_file(language: &str, filename: &str) -> Result<String, Box<dyn std::error::Error>> {
     use std::fmt;
+    use std::path::PathBuf;
 
     #[derive(rust_embed::RustEmbed)]
     #[folder = "../runtime/"]
diff --git a/helix-core/src/textobject.rs b/helix-core/src/textobject.rs
new file mode 100644
index 00000000..fbf66256
--- /dev/null
+++ b/helix-core/src/textobject.rs
@@ -0,0 +1,318 @@
+use ropey::RopeSlice;
+
+use crate::chars::{categorize_char, char_is_line_ending, char_is_whitespace, CharCategory};
+use crate::movement::{self, Direction};
+use crate::surround;
+use crate::Range;
+
+fn this_word_end_pos(slice: RopeSlice, pos: usize) -> usize {
+    this_word_bound_pos(slice, pos, Direction::Forward)
+}
+
+fn this_word_start_pos(slice: RopeSlice, pos: usize) -> usize {
+    this_word_bound_pos(slice, pos, Direction::Backward)
+}
+
+fn this_word_bound_pos(slice: RopeSlice, mut pos: usize, direction: Direction) -> usize {
+    let iter = match direction {
+        Direction::Forward => slice.chars_at(pos + 1),
+        Direction::Backward => {
+            let mut iter = slice.chars_at(pos);
+            iter.reverse();
+            iter
+        }
+    };
+
+    match categorize_char(slice.char(pos)) {
+        CharCategory::Eol | CharCategory::Whitespace => pos,
+        category => {
+            for peek in iter {
+                let curr_category = categorize_char(peek);
+                if curr_category != category
+                    || curr_category == CharCategory::Eol
+                    || curr_category == CharCategory::Whitespace
+                {
+                    return pos;
+                }
+                pos = match direction {
+                    Direction::Forward => pos + 1,
+                    Direction::Backward => pos.saturating_sub(1),
+                }
+            }
+            pos
+        }
+    }
+}
+
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub enum TextObject {
+    Around,
+    Inside,
+}
+
+// count doesn't do anything yet
+pub fn textobject_word(
+    slice: RopeSlice,
+    range: Range,
+    textobject: TextObject,
+    count: usize,
+) -> Range {
+    let this_word_start = this_word_start_pos(slice, range.head);
+    let this_word_end = this_word_end_pos(slice, range.head);
+
+    let (anchor, head);
+    match textobject {
+        TextObject::Inside => {
+            anchor = this_word_start;
+            head = this_word_end;
+        }
+        TextObject::Around => {
+            if slice
+                .get_char(this_word_end + 1)
+                .map_or(true, char_is_line_ending)
+            {
+                head = this_word_end;
+                if slice
+                    .get_char(this_word_start.saturating_sub(1))
+                    .map_or(true, char_is_line_ending)
+                {
+                    // single word on a line
+                    anchor = this_word_start;
+                } else {
+                    // last word on a line, select the whitespace before it too
+                    anchor = movement::move_prev_word_end(slice, range, count).head;
+                }
+            } else if char_is_whitespace(slice.char(range.head)) {
+                // select whole whitespace and next word
+                head = movement::move_next_word_end(slice, range, count).head;
+                anchor = movement::backwards_skip_while(slice, range.head, |c| c.is_whitespace())
+                    .map(|p| p + 1) // p is first *non* whitespace char, so +1 to get whitespace pos
+                    .unwrap_or(0);
+            } else {
+                head = movement::move_next_word_start(slice, range, count).head;
+                anchor = this_word_start;
+            }
+        }
+    };
+    Range::new(anchor, head)
+}
+
+pub fn textobject_surround(
+    slice: RopeSlice,
+    range: Range,
+    textobject: TextObject,
+    ch: char,
+    count: usize,
+) -> Range {
+    surround::find_nth_pairs_pos(slice, ch, range.head, count)
+        .map(|(anchor, head)| match textobject {
+            TextObject::Inside => Range::new(anchor + 1, head.saturating_sub(1)),
+            TextObject::Around => Range::new(anchor, head),
+        })
+        .unwrap_or(range)
+}
+
+#[cfg(test)]
+mod test {
+    use super::TextObject::*;
+    use super::*;
+
+    use crate::Range;
+    use ropey::Rope;
+
+    #[test]
+    fn test_textobject_word() {
+        // (text, [(cursor position, textobject, final range), ...])
+        let tests = &[
+            (
+                "cursor at beginning of doc",
+                vec![(0, Inside, (0, 5)), (0, Around, (0, 6))],
+            ),
+            (
+                "cursor at middle of word",
+                vec![
+                    (13, Inside, (10, 15)),
+                    (10, Inside, (10, 15)),
+                    (15, Inside, (10, 15)),
+                    (13, Around, (10, 16)),
+                    (10, Around, (10, 16)),
+                    (15, Around, (10, 16)),
+                ],
+            ),
+            (
+                "cursor between word whitespace",
+                vec![(6, Inside, (6, 6)), (6, Around, (6, 13))],
+            ),
+            (
+                "cursor on word before newline\n",
+                vec![
+                    (22, Inside, (22, 28)),
+                    (28, Inside, (22, 28)),
+                    (25, Inside, (22, 28)),
+                    (22, Around, (21, 28)),
+                    (28, Around, (21, 28)),
+                    (25, Around, (21, 28)),
+                ],
+            ),
+            (
+                "cursor on newline\nnext line",
+                vec![(17, Inside, (17, 17)), (17, Around, (17, 22))],
+            ),
+            (
+                "cursor on word after newline\nnext line",
+                vec![
+                    (29, Inside, (29, 32)),
+                    (30, Inside, (29, 32)),
+                    (32, Inside, (29, 32)),
+                    (29, Around, (29, 33)),
+                    (30, Around, (29, 33)),
+                    (32, Around, (29, 33)),
+                ],
+            ),
+            (
+                "cursor on #$%:;* punctuation",
+                vec![
+                    (13, Inside, (10, 15)),
+                    (10, Inside, (10, 15)),
+                    (15, Inside, (10, 15)),
+                    (13, Around, (10, 16)),
+                    (10, Around, (10, 16)),
+                    (15, Around, (10, 16)),
+                ],
+            ),
+            (
+                "cursor on punc%^#$:;.tuation",
+                vec![
+                    (14, Inside, (14, 20)),
+                    (20, Inside, (14, 20)),
+                    (17, Inside, (14, 20)),
+                    (14, Around, (14, 20)),
+                    // FIXME: edge case
+                    // (20, Around, (14, 20)),
+                    (17, Around, (14, 20)),
+                ],
+            ),
+            (
+                "cursor in   extra whitespace",
+                vec![
+                    (9, Inside, (9, 9)),
+                    (10, Inside, (10, 10)),
+                    (11, Inside, (11, 11)),
+                    (9, Around, (9, 16)),
+                    (10, Around, (9, 16)),
+                    (11, Around, (9, 16)),
+                ],
+            ),
+            (
+                "cursor at end of doc",
+                vec![(19, Inside, (17, 19)), (19, Around, (16, 19))],
+            ),
+        ];
+
+        for (sample, scenario) in tests {
+            let doc = Rope::from(*sample);
+            let slice = doc.slice(..);
+            for &case in scenario {
+                let (pos, objtype, expected_range) = case;
+                let result = textobject_word(slice, Range::point(pos), objtype, 1);
+                assert_eq!(
+                    result,
+                    expected_range.into(),
+                    "\nCase failed: {:?} - {:?}",
+                    sample,
+                    case
+                );
+            }
+        }
+    }
+
+    #[test]
+    fn test_textobject_surround() {
+        // (text, [(cursor position, textobject, final range, count), ...])
+        let tests = &[
+            (
+                "simple (single) surround pairs",
+                vec![
+                    (3, Inside, (3, 3), '(', 1),
+                    (7, Inside, (8, 13), ')', 1),
+                    (10, Inside, (8, 13), '(', 1),
+                    (14, Inside, (8, 13), ')', 1),
+                    (3, Around, (3, 3), '(', 1),
+                    (7, Around, (7, 14), ')', 1),
+                    (10, Around, (7, 14), '(', 1),
+                    (14, Around, (7, 14), ')', 1),
+                ],
+            ),
+            (
+                "samexx 'single' surround pairs",
+                vec![
+                    (3, Inside, (3, 3), '\'', 1),
+                    (7, Inside, (8, 13), '\'', 1),
+                    (10, Inside, (8, 13), '\'', 1),
+                    (14, Inside, (8, 13), '\'', 1),
+                    (3, Around, (3, 3), '\'', 1),
+                    (7, Around, (7, 14), '\'', 1),
+                    (10, Around, (7, 14), '\'', 1),
+                    (14, Around, (7, 14), '\'', 1),
+                ],
+            ),
+            (
+                "(nested (surround (pairs)) 3 levels)",
+                vec![
+                    (0, Inside, (1, 34), '(', 1),
+                    (6, Inside, (1, 34), ')', 1),
+                    (8, Inside, (9, 24), '(', 1),
+                    (8, Inside, (9, 34), ')', 2),
+                    (20, Inside, (9, 24), '(', 2),
+                    (20, Inside, (1, 34), ')', 3),
+                    (0, Around, (0, 35), '(', 1),
+                    (6, Around, (0, 35), ')', 1),
+                    (8, Around, (8, 25), '(', 1),
+                    (8, Around, (8, 35), ')', 2),
+                    (20, Around, (8, 25), '(', 2),
+                    (20, Around, (0, 35), ')', 3),
+                ],
+            ),
+            (
+                "(mixed {surround [pair] same} line)",
+                vec![
+                    (2, Inside, (1, 33), '(', 1),
+                    (9, Inside, (8, 27), '{', 1),
+                    (18, Inside, (18, 21), '[', 1),
+                    (2, Around, (0, 34), '(', 1),
+                    (9, Around, (7, 28), '{', 1),
+                    (18, Around, (17, 22), '[', 1),
+                ],
+            ),
+            (
+                "(stepped (surround) pairs (should) skip)",
+                vec![(22, Inside, (1, 38), '(', 1), (22, Around, (0, 39), '(', 1)],
+            ),
+            (
+                "[surround pairs{\non different]\nlines}",
+                vec![
+                    (7, Inside, (1, 28), '[', 1),
+                    (15, Inside, (16, 35), '{', 1),
+                    (7, Around, (0, 29), '[', 1),
+                    (15, Around, (15, 36), '{', 1),
+                ],
+            ),
+        ];
+
+        for (sample, scenario) in tests {
+            let doc = Rope::from(*sample);
+            let slice = doc.slice(..);
+            for &case in scenario {
+                let (pos, objtype, expected_range, ch, count) = case;
+                let result = textobject_surround(slice, Range::point(pos), objtype, ch, count);
+                assert_eq!(
+                    result,
+                    expected_range.into(),
+                    "\nCase failed: {:?} - {:?}",
+                    sample,
+                    case
+                );
+            }
+        }
+    }
+}
diff --git a/helix-term/src/application.rs b/helix-term/src/application.rs
index 9622ad91..17ba2652 100644
--- a/helix-term/src/application.rs
+++ b/helix-term/src/application.rs
@@ -160,7 +160,11 @@ impl Application {
                     }
                     self.render();
                 }
-                Some(callback) = self.jobs.next_job() => {
+                Some(callback) = self.jobs.futures.next() => {
+                    self.jobs.handle_callback(&mut self.editor, &mut self.compositor, callback);
+                    self.render();
+                }
+                Some(callback) = self.jobs.wait_futures.next() => {
                     self.jobs.handle_callback(&mut self.editor, &mut self.compositor, callback);
                     self.render();
                 }
diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index 5ab0926a..fbeae5ff 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -16,6 +16,7 @@ use helix_core::{
 use helix_view::{
     document::{IndentStyle, Mode},
     editor::Action,
+    info::Info,
     input::KeyEvent,
     keyboard::KeyCode,
     view::{View, PADDING},
@@ -38,6 +39,7 @@ use crate::{
 
 use crate::job::{self, Job, Jobs};
 use futures_util::{FutureExt, TryFutureExt};
+use std::collections::HashMap;
 use std::{fmt, future::Future};
 
 use std::{
@@ -45,7 +47,7 @@ use std::{
     path::{Path, PathBuf},
 };
 
-use once_cell::sync::Lazy;
+use once_cell::sync::{Lazy, OnceCell};
 use serde::de::{self, Deserialize, Deserializer};
 
 pub struct Context<'a> {
@@ -75,6 +77,16 @@ impl<'a> Context<'a> {
     }
 
     #[inline]
+    pub fn on_next_key_mode(&mut self, map: HashMap<KeyEvent, fn(&mut Context)>) {
+        self.on_next_key(move |cx, event| {
+            cx.editor.autoinfo = None;
+            if let Some(func) = map.get(&event) {
+                func(cx);
+            }
+        });
+    }
+
+    #[inline]
     pub fn callback<T, F>(
         &mut self,
         call: impl Future<Output = helix_lsp::Result<serde_json::Value>> + 'static + Send,
@@ -153,17 +165,12 @@ impl Command {
         move_char_right,
         move_line_up,
         move_line_down,
-        move_line_end,
-        move_line_start,
-        move_first_nonwhitespace,
         move_next_word_start,
         move_prev_word_start,
         move_next_word_end,
         move_next_long_word_start,
         move_prev_long_word_start,
         move_next_long_word_end,
-        move_file_start,
-        move_file_end,
         extend_next_word_start,
         extend_prev_word_start,
         extend_next_word_end,
@@ -175,7 +182,6 @@ impl Command {
         find_prev_char,
         extend_till_prev_char,
         extend_prev_char,
-        extend_first_nonwhitespace,
         replace,
         page_up,
         page_down,
@@ -185,8 +191,6 @@ impl Command {
         extend_char_right,
         extend_line_up,
         extend_line_down,
-        extend_line_end,
-        extend_line_start,
         select_all,
         select_regex,
         split_selection,
@@ -196,6 +200,7 @@ impl Command {
         extend_search_next,
         search_selection,
         extend_line,
+        extend_to_line_bounds,
         delete_selection,
         change_selection,
         collapse_selection,
@@ -217,11 +222,17 @@ impl Command {
         goto_definition,
         goto_type_definition,
         goto_implementation,
+        goto_file_start,
+        goto_file_end,
         goto_reference,
         goto_first_diag,
         goto_last_diag,
         goto_next_diag,
         goto_prev_diag,
+        goto_line_start,
+        goto_line_end,
+        goto_line_end_newline,
+        goto_first_nonwhitespace,
         signature_help,
         insert_tab,
         insert_newline,
@@ -376,7 +387,7 @@ fn move_line_down(cx: &mut Context) {
     );
 }
 
-fn move_line_end(cx: &mut Context) {
+fn goto_line_end(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
     doc.set_selection(
         view.id,
@@ -388,12 +399,33 @@ fn move_line_end(cx: &mut Context) {
             let pos = graphemes::nth_prev_grapheme_boundary(text.slice(..), pos, 1);
             let pos = range.head.max(pos).max(text.line_to_char(line));
 
+            Range::new(
+                match doc.mode {
+                    Mode::Normal | Mode::Insert => pos,
+                    Mode::Select => range.anchor,
+                },
+                pos,
+            )
+        }),
+    );
+}
+
+fn goto_line_end_newline(cx: &mut Context) {
+    let (view, doc) = current!(cx.editor);
+
+    doc.set_selection(
+        view.id,
+        doc.selection(view.id).clone().transform(|range| {
+            let text = doc.text();
+            let line = text.char_to_line(range.head);
+
+            let pos = line_end_char_index(&text.slice(..), line);
             Range::new(pos, pos)
         }),
     );
 }
 
-fn move_line_start(cx: &mut Context) {
+fn goto_line_start(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
     doc.set_selection(
         view.id,
@@ -403,12 +435,18 @@ fn move_line_start(cx: &mut Context) {
 
             // adjust to start of the line
             let pos = text.line_to_char(line);
-            Range::new(pos, pos)
+            Range::new(
+                match doc.mode {
+                    Mode::Normal | Mode::Insert => pos,
+                    Mode::Select => range.anchor,
+                },
+                pos,
+            )
         }),
     );
 }
 
-fn move_first_nonwhitespace(cx: &mut Context) {
+fn goto_first_nonwhitespace(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
     doc.set_selection(
         view.id,
@@ -418,7 +456,13 @@ fn move_first_nonwhitespace(cx: &mut Context) {
 
             if let Some(pos) = find_first_non_whitespace_char(text.line(line_idx)) {
                 let pos = pos + text.line_to_char(line_idx);
-                Range::new(pos, pos)
+                Range::new(
+                    match doc.mode {
+                        Mode::Normal | Mode::Insert => pos,
+                        Mode::Select => range.anchor,
+                    },
+                    pos,
+                )
             } else {
                 range
             }
@@ -426,6 +470,37 @@ fn move_first_nonwhitespace(cx: &mut Context) {
     );
 }
 
+fn goto_window(cx: &mut Context, align: Align) {
+    let (view, doc) = current!(cx.editor);
+
+    let scrolloff = PADDING.min(view.area.height as usize / 2); // TODO: user pref
+
+    let last_line = view.last_line(doc);
+
+    let line = match align {
+        Align::Top => (view.first_line + scrolloff),
+        Align::Center => (view.first_line + (view.area.height as usize / 2)),
+        Align::Bottom => last_line.saturating_sub(scrolloff),
+    }
+    .min(last_line.saturating_sub(scrolloff));
+
+    let pos = doc.text().line_to_char(line);
+
+    doc.set_selection(view.id, Selection::point(pos));
+}
+
+fn goto_window_top(cx: &mut Context) {
+    goto_window(cx, Align::Top)
+}
+
+fn goto_window_middle(cx: &mut Context) {
+    goto_window(cx, Align::Center)
+}
+
+fn goto_window_bottom(cx: &mut Context) {
+    goto_window(cx, Align::Bottom)
+}
+
 // TODO: move vs extend could take an extra type Extend/Move that would
 // Range::new(if Move { pos } if Extend { range.anchor }, pos)
 // since these all really do the same thing
@@ -497,13 +572,13 @@ fn move_next_long_word_end(cx: &mut Context) {
     );
 }
 
-fn move_file_start(cx: &mut Context) {
+fn goto_file_start(cx: &mut Context) {
     push_jump(cx.editor);
     let (view, doc) = current!(cx.editor);
     doc.set_selection(view.id, Selection::point(0));
 }
 
-fn move_file_end(cx: &mut Context) {
+fn goto_file_end(cx: &mut Context) {
     push_jump(cx.editor);
     let (view, doc) = current!(cx.editor);
     let text = doc.text();
@@ -683,24 +758,6 @@ fn extend_prev_char(cx: &mut Context) {
     )
 }
 
-fn extend_first_nonwhitespace(cx: &mut Context) {
-    let (view, doc) = current!(cx.editor);
-    doc.set_selection(
-        view.id,
-        doc.selection(view.id).clone().transform(|range| {
-            let text = doc.text();
-            let line_idx = text.char_to_line(range.head);
-
-            if let Some(pos) = find_first_non_whitespace_char(text.line(line_idx)) {
-                let pos = pos + text.line_to_char(line_idx);
-                Range::new(range.anchor, pos)
-            } else {
-                range
-            }
-        }),
-    );
-}
-
 fn replace(cx: &mut Context) {
     let mut buf = [0u8; 4]; // To hold utf8 encoded char.
 
@@ -880,38 +937,6 @@ fn extend_line_down(cx: &mut Context) {
     );
 }
 
-fn extend_line_end(cx: &mut Context) {
-    let (view, doc) = current!(cx.editor);
-    doc.set_selection(
-        view.id,
-        doc.selection(view.id).clone().transform(|range| {
-            let text = doc.text().slice(..);
-            let line = text.char_to_line(range.head);
-
-            let pos = line_end_char_index(&text, line);
-            let pos = graphemes::nth_prev_grapheme_boundary(text, pos, 1);
-            let pos = range.head.max(pos).max(text.line_to_char(line));
-
-            Range::new(range.anchor, pos)
-        }),
-    );
-}
-
-fn extend_line_start(cx: &mut Context) {
-    let (view, doc) = current!(cx.editor);
-    doc.set_selection(
-        view.id,
-        doc.selection(view.id).clone().transform(|range| {
-            let text = doc.text();
-            let line = text.char_to_line(range.head);
-
-            // adjust to start of the line
-            let pos = text.line_to_char(line);
-            Range::new(range.anchor, pos)
-        }),
-    );
-}
-
 fn select_all(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
 
@@ -1055,6 +1080,27 @@ fn extend_line(cx: &mut Context) {
     doc.set_selection(view.id, Selection::single(start, end));
 }
 
+fn extend_to_line_bounds(cx: &mut Context) {
+    let (view, doc) = current!(cx.editor);
+
+    doc.set_selection(
+        view.id,
+        doc.selection(view.id).clone().transform(|range| {
+            let text = doc.text();
+            let start = text.line_to_char(text.char_to_line(range.from()));
+            let end = text
+                .line_to_char(text.char_to_line(range.to()) + 1)
+                .saturating_sub(1);
+
+            if range.anchor < range.head {
+                Range::new(start, end)
+            } else {
+                Range::new(end, start)
+            }
+        }),
+    );
+}
+
 fn delete_selection_impl(reg: &mut Register, doc: &mut Document, view_id: ViewId) {
     let text = doc.text().slice(..);
     let selection = doc.selection(view_id).clone().min_width_1(text);
@@ -1580,6 +1626,24 @@ mod cmd {
         }
     }
 
+    /// Sets the [`Document`]'s encoding..
+    fn set_encoding(cx: &mut compositor::Context, args: &[&str], _: PromptEvent) {
+        let (_, doc) = current!(cx.editor);
+        if let Some(label) = args.first() {
+            doc.set_encoding(label)
+                .unwrap_or_else(|e| cx.editor.set_error(e.to_string()));
+        } else {
+            let encoding = doc.encoding().name().to_string();
+            cx.editor.set_status(encoding)
+        }
+    }
+
+    /// Reload the [`Document`] from its source file.
+    fn reload(cx: &mut compositor::Context, _args: &[&str], _: PromptEvent) {
+        let (view, doc) = current!(cx.editor);
+        doc.reload(view.id).unwrap();
+    }
+
     pub const TYPABLE_COMMAND_LIST: &[TypableCommand] = &[
         TypableCommand {
             name: "quit",
@@ -1763,6 +1827,20 @@ mod cmd {
             fun: show_current_directory,
             completer: None,
         },
+        TypableCommand {
+            name: "encoding",
+            alias: None,
+            doc: "Set encoding based on `https://encoding.spec.whatwg.org`",
+            fun: set_encoding,
+            completer: None,
+        },
+        TypableCommand {
+            name: "reload",
+            alias: None,
+            doc: "Discard changes and reload from the source file.",
+            fun: reload,
+            completer: None,
+        }
     ];
 
     pub static COMMANDS: Lazy<HashMap<&'static str, &'static TypableCommand>> = Lazy::new(|| {
@@ -1955,7 +2033,7 @@ fn symbol_picker(cx: &mut Context) {
 
 // I inserts at the first nonwhitespace character of each line with a selection
 fn prepend_to_line(cx: &mut Context) {
-    move_first_nonwhitespace(cx);
+    goto_first_nonwhitespace(cx);
     let doc = doc_mut!(cx.editor);
     enter_insert_mode(doc);
 }
@@ -2124,7 +2202,7 @@ fn push_jump(editor: &mut Editor) {
     view.jumps.push(jump);
 }
 
-fn switch_to_last_accessed_file(cx: &mut Context) {
+fn goto_last_accessed_file(cx: &mut Context) {
     let alternate_file = view!(cx.editor).last_accessed_doc;
     if let Some(alt) = alternate_file {
         cx.editor.switch(alt, Action::Replace);
@@ -2133,65 +2211,6 @@ fn switch_to_last_accessed_file(cx: &mut Context) {
     }
 }
 
-fn goto_mode(cx: &mut Context) {
-    if let Some(count) = cx.count {
-        push_jump(cx.editor);
-
-        let (view, doc) = current!(cx.editor);
-        let line_idx = std::cmp::min(count.get() - 1, doc.text().len_lines().saturating_sub(2));
-        let pos = doc.text().line_to_char(line_idx);
-        doc.set_selection(view.id, Selection::point(pos));
-        return;
-    }
-
-    cx.on_next_key(move |cx, event| {
-        if let KeyEvent {
-            code: KeyCode::Char(ch),
-            ..
-        } = event
-        {
-            // TODO: temporarily show GOTO in the mode list
-            let doc = doc_mut!(cx.editor);
-            match (doc.mode, ch) {
-                (_, 'g') => move_file_start(cx),
-                (_, 'e') => move_file_end(cx),
-                (_, 'a') => switch_to_last_accessed_file(cx),
-                (Mode::Normal, 'h') => move_line_start(cx),
-                (Mode::Normal, 'l') => move_line_end(cx),
-                (Mode::Select, 'h') => extend_line_start(cx),
-                (Mode::Select, 'l') => extend_line_end(cx),
-                (_, 'd') => goto_definition(cx),
-                (_, 'y') => goto_type_definition(cx),
-                (_, 'r') => goto_reference(cx),
-                (_, 'i') => goto_implementation(cx),
-                (Mode::Normal, 's') => move_first_nonwhitespace(cx),
-                (Mode::Select, 's') => extend_first_nonwhitespace(cx),
-
-                (_, 't') | (_, 'm') | (_, 'b') => {
-                    let (view, doc) = current!(cx.editor);
-
-                    let scrolloff = PADDING.min(view.area.height as usize / 2); // TODO: user pref
-
-                    let last_line = view.last_line(doc);
-
-                    let line = match ch {
-                        't' => (view.first_line + scrolloff),
-                        'm' => (view.first_line + (view.area.height as usize / 2)),
-                        'b' => last_line.saturating_sub(scrolloff),
-                        _ => unreachable!(),
-                    }
-                    .min(last_line.saturating_sub(scrolloff));
-
-                    let pos = doc.text().line_to_char(line);
-
-                    doc.set_selection(view.id, Selection::point(pos));
-                }
-                _ => (),
-            }
-        }
-    })
-}
-
 fn select_mode(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
 
@@ -2211,13 +2230,27 @@ fn select_mode(cx: &mut Context) {
         }),
     );
 
-    doc.mode = Mode::Select;
+    doc_mut!(cx.editor).mode = Mode::Select;
 }
 
 fn exit_select_mode(cx: &mut Context) {
     doc_mut!(cx.editor).mode = Mode::Normal;
 }
 
+fn goto_prehook(cx: &mut Context) -> bool {
+    if let Some(count) = cx.count {
+        push_jump(cx.editor);
+
+        let (view, doc) = current!(cx.editor);
+        let line_idx = std::cmp::min(count.get() - 1, doc.text().len_lines().saturating_sub(1));
+        let pos = doc.text().line_to_char(line_idx);
+        doc.set_selection(view.id, Selection::point(pos));
+        true
+    } else {
+        false
+    }
+}
+
 fn goto_impl(
     editor: &mut Editor,
     compositor: &mut Compositor,
@@ -3457,33 +3490,6 @@ fn select_register(cx: &mut Context) {
     })
 }
 
-fn space_mode(cx: &mut Context) {
-    cx.on_next_key(move |cx, event| {
-        if let KeyEvent {
-            code: KeyCode::Char(ch),
-            ..
-        } = event
-        {
-            // TODO: temporarily show SPC in the mode list
-            match ch {
-                'f' => file_picker(cx),
-                'b' => buffer_picker(cx),
-                's' => symbol_picker(cx),
-                'w' => window_mode(cx),
-                'y' => yank_joined_to_clipboard(cx),
-                'Y' => yank_main_selection_to_clipboard(cx),
-                'p' => paste_clipboard_after(cx),
-                'P' => paste_clipboard_before(cx),
-                'R' => replace_selections_with_clipboard(cx),
-                // ' ' => toggle_alternate_buffer(cx),
-                // TODO: temporary since space mode took its old key
-                ' ' => keep_primary_selection(cx),
-                _ => (),
-            }
-        }
-    })
-}
-
 fn view_mode(cx: &mut Context) {
     cx.on_next_key(move |cx, event| {
         if let KeyEvent {
@@ -3559,6 +3565,9 @@ fn right_bracket_mode(cx: &mut Context) {
     })
 }
 
+use helix_core::surround;
+use helix_core::textobject;
+
 fn match_mode(cx: &mut Context) {
     let count = cx.count;
     cx.on_next_key(move |cx, event| {
@@ -3574,13 +3583,41 @@ fn match_mode(cx: &mut Context) {
                 's' => surround_add(cx),
                 'r' => surround_replace(cx),
                 'd' => surround_delete(cx),
+                'a' => select_textobject(cx, textobject::TextObject::Around),
+                'i' => select_textobject(cx, textobject::TextObject::Inside),
                 _ => (),
             }
         }
     })
 }
 
-use helix_core::surround;
+fn select_textobject(cx: &mut Context, objtype: textobject::TextObject) {
+    let count = cx.count();
+    cx.on_next_key(move |cx, event| {
+        if let KeyEvent {
+            code: KeyCode::Char(ch),
+            ..
+        } = event
+        {
+            let (view, doc) = current!(cx.editor);
+
+            doc.set_selection(
+                view.id,
+                doc.selection(view.id).clone().transform(|range| {
+                    let text = doc.text().slice(..);
+                    match ch {
+                        'w' => textobject::textobject_word(text, range, objtype, count),
+                        // TODO: cancel new ranges if inconsistent surround matches across lines
+                        ch if !ch.is_ascii_alphanumeric() => {
+                            textobject::textobject_surround(text, range, objtype, ch, count)
+                        }
+                        _ => range,
+                    }
+                }),
+            );
+        }
+    })
+}
 
 fn surround_add(cx: &mut Context) {
     cx.on_next_key(move |cx, event| {
@@ -3671,3 +3708,132 @@ fn surround_delete(cx: &mut Context) {
         }
     })
 }
+
+/// Do nothing, just for modeinfo.
+fn noop(_cx: &mut Context) -> bool {
+    false
+}
+
+/// Generate modeinfo.
+///
+/// If prehook returns true then it will stop the rest.
+macro_rules! mode_info {
+    // TODO: reuse $mode for $stat
+    (@join $first:expr $(,$rest:expr)*) => {
+        concat!($first, $(", ", $rest),*)
+    };
+    (@name #[doc = $name:literal] $(#[$rest:meta])*) => {
+        $name
+    };
+    {
+        #[doc = $name:literal] $(#[$doc:meta])* $mode:ident, $stat:ident,
+        $(#[doc = $desc:literal] $($key:tt)|+ => $func:expr),+,
+    } => {
+        mode_info! {
+            #[doc = $name]
+            $(#[$doc])*
+            $mode, $stat, noop,
+            $(
+            #[doc = $desc]
+            $($key)|+ => $func
+            ),+,
+        }
+    };
+    {
+        #[doc = $name:literal] $(#[$doc:meta])* $mode:ident, $stat:ident, $prehook:expr,
+        $(#[doc = $desc:literal] $($key:tt)|+ => $func:expr),+,
+    } => {
+        #[doc = $name]
+        $(#[$doc])*
+        #[doc = ""]
+        #[doc = "<table><tr><th>key</th><th>desc</th></tr><tbody>"]
+        $(
+        #[doc = "<tr><td>"]
+        // TODO switch to this once we use rust 1.54
+        // right now it will produce multiple rows
+        // #[doc = mode_info!(@join $($key),+)]
+        $(
+        #[doc = $key]
+        )+
+        // <-
+        #[doc = "</td><td>"]
+        #[doc = $desc]
+        #[doc = "</td></tr>"]
+        )+
+        #[doc = "</tbody></table>"]
+        pub fn $mode(cx: &mut Context) {
+            if $prehook(cx) {
+                return;
+            }
+            static $stat: OnceCell<Info> = OnceCell::new();
+            cx.editor.autoinfo = Some($stat.get_or_init(|| Info::key(
+                $name.trim(),
+                vec![$((&[$($key.parse().unwrap()),+], $desc)),+],
+            )));
+            use helix_core::hashmap;
+            // TODO: try and convert this to match later
+            let map = hashmap! {
+                $($($key.parse::<KeyEvent>().unwrap() => $func as for<'r, 's> fn(&'r mut Context<'s>)),+),*
+            };
+            cx.on_next_key_mode(map);
+        }
+    };
+}
+
+mode_info! {
+    /// space mode
+    space_mode, SPACE_MODE,
+    /// file picker
+    "f" => file_picker,
+    /// buffer picker
+    "b" => buffer_picker,
+    /// symbol picker
+    "s" => symbol_picker,
+    /// window mode
+    "w" => window_mode,
+    /// yank joined to clipboard
+    "y" => yank_joined_to_clipboard,
+    /// yank main selection to clipboard
+    "Y" => yank_main_selection_to_clipboard,
+    /// paste system clipboard after selections
+    "p" => paste_clipboard_after,
+    /// paste system clipboard before selections
+    "P" => paste_clipboard_before,
+    /// replace selections with clipboard
+    "R" => replace_selections_with_clipboard,
+    /// keep primary selection
+    "space" => keep_primary_selection,
+}
+
+mode_info! {
+    /// goto mode
+    ///
+    /// When specified with a count, it will go to that line without entering the mode.
+    goto_mode, GOTO_MODE, goto_prehook,
+    /// file start
+    "g" => goto_file_start,
+    /// file end
+    "e" => goto_file_end,
+    /// line start
+    "h" => goto_line_start,
+    /// line end
+    "l" => goto_line_end,
+    /// line first non blank
+    "s" => goto_first_nonwhitespace,
+    /// definition
+    "d" => goto_definition,
+    /// type references
+    "y" => goto_type_definition,
+    /// references
+    "r" => goto_reference,
+    /// implementation
+    "i" => goto_implementation,
+    /// window top
+    "t" => goto_window_top,
+    /// window middle
+    "m" => goto_window_middle,
+    /// window bottom
+    "b" => goto_window_bottom,
+    /// last accessed file
+    "a" => goto_last_accessed_file,
+}
diff --git a/helix-term/src/job.rs b/helix-term/src/job.rs
index c2873513..2ac41926 100644
--- a/helix-term/src/job.rs
+++ b/helix-term/src/job.rs
@@ -16,9 +16,9 @@ pub struct Job {
 
 #[derive(Default)]
 pub struct Jobs {
-    futures: FuturesUnordered<JobFuture>,
+    pub futures: FuturesUnordered<JobFuture>,
     /// These are the ones that need to complete before we exit.
-    wait_futures: FuturesUnordered<JobFuture>,
+    pub wait_futures: FuturesUnordered<JobFuture>,
 }
 
 impl Job {
@@ -77,11 +77,11 @@ impl Jobs {
         }
     }
 
-    pub fn next_job(
-        &mut self,
-    ) -> impl Future<Output = Option<anyhow::Result<Option<Callback>>>> + '_ {
-        future::select(self.futures.next(), self.wait_futures.next())
-            .map(|either| either.factor_first().0)
+    pub async fn next_job(&mut self) -> Option<anyhow::Result<Option<Callback>>> {
+        tokio::select! {
+            event = self.futures.next() => {  event }
+            event = self.wait_futures.next() => { event }
+        }
     }
 
     pub fn add(&mut self, j: Job) {
diff --git a/helix-term/src/keymap.rs b/helix-term/src/keymap.rs
index 53588a2b..d815e006 100644
--- a/helix-term/src/keymap.rs
+++ b/helix-term/src/keymap.rs
@@ -1,118 +1,25 @@
 pub use crate::commands::Command;
 use crate::config::Config;
 use helix_core::hashmap;
-use helix_view::{
-    document::Mode,
-    input::KeyEvent,
-    keyboard::{KeyCode, KeyModifiers},
-};
+use helix_view::{document::Mode, input::KeyEvent};
 use serde::Deserialize;
 use std::{
     collections::HashMap,
     ops::{Deref, DerefMut},
 };
 
-// Kakoune-inspired:
-// mode = {
-//      normal = {
-//          q = record_macro
-//          w = (next) word
-//          W = next WORD
-//          e = end of word
-//          E = end of WORD
-//          r = replace
-//          R = replace with yanked
-//          t = 'till char
-//          y = yank
-//          u = undo
-//          U = redo
-//          i = insert
-//          I = INSERT (start of line)
-//          o = open below (insert on new line below)
-//          O = open above (insert on new line above)
-//          p = paste (before cursor)
-//          P = PASTE (after cursor)
-//          ` =
-//          [ = select to text object start (alt = select whole object)
-//          ] = select to text object end
-//          { = extend to inner object start
-//          } = extend to inner object end
-//          a = append
-//          A = APPEND (end of line)
-//          s = split
-//          S = select
-//          d = delete()
-//          f = find_char()
-//          g = goto (gg, G, gc, gd, etc)
-//
-//          h = move_char_left(n)   || arrow-left  = move_char_left(n)
-//          j = move_line_down(n)   || arrow-down  = move_line_down(n)
-//          k = move_line_up(n)     || arrow_up    = move_line_up(n)
-//          l = move_char_right(n)  || arrow-right = move_char_right(n)
-//          : = command line
-//          ; = collapse selection to cursor
-//          " = use register
-//          ` = convert case? (to lower) (alt = swap case)
-//          ~ = convert to upper case
-//          . = repeat last command
-//          \ = disable hook?
-//          / = search
-//          > = indent
-//          < = deindent
-//          % = select whole buffer (in vim = jump to matching bracket)
-//          * = search pattern in selection
-//          ( = rotate main selection backward
-//          ) = rotate main selection forward
-//          - = trim selections? (alt = merge contiguous sel together)
-//          @ = convert tabs to spaces
-//          & = align cursor
-//          ? = extend to next given regex match (alt = to prev)
-//
-//          in kakoune these are alt-h alt-l / gh gl
-//                              select from curs to begin end / move curs to begin end
-//          0 = start of line
-//          ^ = start of line(first non blank char) || Home  = start of line(first non blank char)
-//          $ = end of line                         || End   = end of line
-//
-//          z = save selections
-//          Z = restore selections
-//          x = select line
-//          X = extend line
-//          c = change selected text
-//          C = copy selection?
-//          v = view menu (viewport manipulation)
-//          b = select to previous word start
-//          B = select to previous WORD start
-//
-//
-//
-//
-//
-//
-//          = = align?
-//          + =
-//      }
-//
-//      gd = goto definition
-//      gr = goto reference
-//      [d = previous diagnostic
-//      d] = next diagnostic
-//      [D = first diagnostic
-//      D] = last diagnostic
-// }
-
 #[macro_export]
 macro_rules! key {
     ($key:ident) => {
         KeyEvent {
-            code: KeyCode::$key,
-            modifiers: KeyModifiers::NONE,
+            code: ::helix_view::keyboard::KeyCode::$key,
+            modifiers: ::helix_view::keyboard::KeyModifiers::NONE,
         }
     };
     ($($ch:tt)*) => {
         KeyEvent {
-            code: KeyCode::Char($($ch)*),
-            modifiers: KeyModifiers::NONE,
+            code: ::helix_view::keyboard::KeyCode::Char($($ch)*),
+            modifiers: ::helix_view::keyboard::KeyModifiers::NONE,
         }
     };
 }
@@ -120,8 +27,8 @@ macro_rules! key {
 macro_rules! ctrl {
     ($($ch:tt)*) => {
         KeyEvent {
-            code: KeyCode::Char($($ch)*),
-            modifiers: KeyModifiers::CONTROL,
+            code: ::helix_view::keyboard::KeyCode::Char($($ch)*),
+            modifiers: ::helix_view::keyboard::KeyModifiers::CONTROL,
         }
     };
 }
@@ -129,8 +36,8 @@ macro_rules! ctrl {
 macro_rules! alt {
     ($($ch:tt)*) => {
         KeyEvent {
-            code: KeyCode::Char($($ch)*),
-            modifiers: KeyModifiers::ALT,
+            code: ::helix_view::keyboard::KeyCode::Char($($ch)*),
+            modifiers: ::helix_view::keyboard::KeyModifiers::ALT,
         }
     };
 }
@@ -175,8 +82,8 @@ impl Default for Keymaps {
             key!('r') => Command::replace,
             key!('R') => Command::replace_with_yanked,
 
-            key!(Home) => Command::move_line_start,
-            key!(End) => Command::move_line_end,
+            key!(Home) => Command::goto_line_start,
+            key!(End) => Command::goto_line_end,
 
             key!('w') => Command::move_next_word_start,
             key!('b') => Command::move_prev_word_start,
@@ -213,7 +120,9 @@ impl Default for Keymaps {
             alt!(';') => Command::flip_selections,
             key!('%') => Command::select_all,
             key!('x') => Command::extend_line,
-            // extend_to_whole_line, crop_to_whole_line
+            key!('x') => Command::extend_line,
+            key!('X') => Command::extend_to_line_bounds,
+            // crop_to_whole_line
 
 
             key!('m') => Command::match_mode,
@@ -307,8 +216,8 @@ impl Default for Keymaps {
 
                 key!('T') => Command::extend_till_prev_char,
                 key!('F') => Command::extend_prev_char,
-                key!(Home) => Command::extend_line_start,
-                key!(End) => Command::extend_line_end,
+                key!(Home) => Command::goto_line_start,
+                key!(End) => Command::goto_line_end,
                 key!(Esc) => Command::exit_select_mode,
             )
             .into_iter(),
@@ -331,8 +240,8 @@ impl Default for Keymaps {
                 key!(Right) => Command::move_char_right,
                 key!(PageUp) => Command::page_up,
                 key!(PageDown) => Command::page_down,
-                key!(Home) => Command::move_line_start,
-                key!(End) => Command::move_line_end,
+                key!(Home) => Command::goto_line_start,
+                key!(End) => Command::goto_line_end_newline,
                 ctrl!('x') => Command::completion,
                 ctrl!('w') => Command::delete_word_backward,
             ),
@@ -352,6 +261,7 @@ pub fn merge_keys(mut config: Config) -> Config {
 
 #[test]
 fn merge_partial_keys() {
+    use helix_view::keyboard::{KeyCode, KeyModifiers};
     let config = Config {
         keys: Keymaps(hashmap! {
             Mode::Normal => hashmap! {
diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs
index dab654ad..d374d9b6 100644
--- a/helix-term/src/ui/editor.rs
+++ b/helix-term/src/ui/editor.rs
@@ -738,6 +738,11 @@ impl Component for EditorView {
             self.render_view(doc, view, area, surface, &cx.editor.theme, is_focused);
         }
 
+        if let Some(info) = std::mem::take(&mut cx.editor.autoinfo) {
+            info.render(area, surface, cx);
+            cx.editor.autoinfo = Some(info);
+        }
+
         // render status msg
         if let Some((status_msg, severity)) = &cx.editor.status_msg {
             use helix_view::editor::Severity;
@@ -756,8 +761,7 @@ impl Component for EditorView {
         }
 
         if let Some(completion) = &self.completion {
-            completion.render(area, surface, cx)
-            // render completion here
+            completion.render(area, surface, cx);
         }
     }
 
diff --git a/helix-term/src/ui/info.rs b/helix-term/src/ui/info.rs
new file mode 100644
index 00000000..e5f20562
--- /dev/null
+++ b/helix-term/src/ui/info.rs
@@ -0,0 +1,30 @@
+use crate::compositor::{Component, Context};
+use helix_view::graphics::Rect;
+use helix_view::info::Info;
+use tui::buffer::Buffer as Surface;
+use tui::widgets::{Block, Borders, Widget};
+
+impl Component for Info {
+    fn render(&self, viewport: Rect, surface: &mut Surface, cx: &mut Context) {
+        let style = cx.editor.theme.get("ui.popup");
+        let block = Block::default()
+            .title(self.title)
+            .borders(Borders::ALL)
+            .border_style(style);
+        let Info { width, height, .. } = self;
+        let (w, h) = (*width + 2, *height + 2);
+        // -2 to subtract command line + statusline. a bit of a hack, because of splits.
+        let area = viewport.intersection(Rect::new(
+            viewport.width.saturating_sub(w),
+            viewport.height.saturating_sub(h + 2),
+            w,
+            h,
+        ));
+        surface.clear_with(area, style);
+        let Rect { x, y, .. } = block.inner(area);
+        for (y, line) in (y..).zip(self.text.lines()) {
+            surface.set_string(x, y, line, style);
+        }
+        block.render(area, surface);
+    }
+}
diff --git a/helix-term/src/ui/mod.rs b/helix-term/src/ui/mod.rs
index 7111c968..288d3d2e 100644
--- a/helix-term/src/ui/mod.rs
+++ b/helix-term/src/ui/mod.rs
@@ -1,5 +1,6 @@
 mod completion;
 mod editor;
+mod info;
 mod markdown;
 mod menu;
 mod picker;
diff --git a/helix-tui/Cargo.toml b/helix-tui/Cargo.toml
index dde2eafe..7f98144c 100644
--- a/helix-tui/Cargo.toml
+++ b/helix-tui/Cargo.toml
@@ -19,7 +19,6 @@ default = ["crossterm"]
 bitflags = "1.0"
 cassowary = "0.3"
 unicode-segmentation = "1.2"
-unicode-width = "0.1"
 crossterm = { version = "0.20", optional = true }
 serde = { version = "1", "optional" = true, features = ["derive"]}
 helix-view = { version = "0.3", path = "../helix-view", features = ["term"] }
diff --git a/helix-tui/src/backend/test.rs b/helix-tui/src/backend/test.rs
index a03bcd8e..3f56b49c 100644
--- a/helix-tui/src/backend/test.rs
+++ b/helix-tui/src/backend/test.rs
@@ -2,9 +2,9 @@ use crate::{
     backend::Backend,
     buffer::{Buffer, Cell},
 };
+use helix_core::unicode::width::UnicodeWidthStr;
 use helix_view::graphics::{CursorKind, Rect};
 use std::{fmt::Write, io};
-use unicode_width::UnicodeWidthStr;
 
 /// A backend used for the integration tests.
 #[derive(Debug)]
diff --git a/helix-tui/src/buffer.rs b/helix-tui/src/buffer.rs
index 3a7ad144..377e3e39 100644
--- a/helix-tui/src/buffer.rs
+++ b/helix-tui/src/buffer.rs
@@ -1,7 +1,7 @@
 use crate::text::{Span, Spans};
+use helix_core::unicode::width::UnicodeWidthStr;
 use std::cmp::min;
 use unicode_segmentation::UnicodeSegmentation;
-use unicode_width::UnicodeWidthStr;
 
 use helix_view::graphics::{Color, Modifier, Rect, Style};
 
diff --git a/helix-tui/src/text.rs b/helix-tui/src/text.rs
index 4af6b09d..b8e52479 100644
--- a/helix-tui/src/text.rs
+++ b/helix-tui/src/text.rs
@@ -47,10 +47,10 @@
 //! ]);
 //! ```
 use helix_core::line_ending::str_is_line_ending;
+use helix_core::unicode::width::UnicodeWidthStr;
 use helix_view::graphics::Style;
 use std::borrow::Cow;
 use unicode_segmentation::UnicodeSegmentation;
-use unicode_width::UnicodeWidthStr;
 
 /// A grapheme associated to a style.
 #[derive(Debug, Clone, PartialEq)]
diff --git a/helix-tui/src/widgets/paragraph.rs b/helix-tui/src/widgets/paragraph.rs
index bdfb5b9a..fee35d25 100644
--- a/helix-tui/src/widgets/paragraph.rs
+++ b/helix-tui/src/widgets/paragraph.rs
@@ -7,9 +7,9 @@ use crate::{
         Block, Widget,
     },
 };
+use helix_core::unicode::width::UnicodeWidthStr;
 use helix_view::graphics::{Rect, Style};
 use std::iter;
-use unicode_width::UnicodeWidthStr;
 
 fn get_line_offset(line_width: u16, text_area_width: u16, alignment: Alignment) -> u16 {
     match alignment {
diff --git a/helix-tui/src/widgets/reflow.rs b/helix-tui/src/widgets/reflow.rs
index ae561a4f..21847783 100644
--- a/helix-tui/src/widgets/reflow.rs
+++ b/helix-tui/src/widgets/reflow.rs
@@ -1,7 +1,7 @@
 use crate::text::StyledGrapheme;
 use helix_core::line_ending::str_is_line_ending;
+use helix_core::unicode::width::UnicodeWidthStr;
 use unicode_segmentation::UnicodeSegmentation;
-use unicode_width::UnicodeWidthStr;
 
 const NBSP: &str = "\u{00a0}";
 
diff --git a/helix-tui/src/widgets/table.rs b/helix-tui/src/widgets/table.rs
index ee5147b7..1ee4286a 100644
--- a/helix-tui/src/widgets/table.rs
+++ b/helix-tui/src/widgets/table.rs
@@ -9,9 +9,9 @@ use cassowary::{
     WeightedRelation::*,
     {Expression, Solver},
 };
+use helix_core::unicode::width::UnicodeWidthStr;
 use helix_view::graphics::{Rect, Style};
 use std::collections::HashMap;
-use unicode_width::UnicodeWidthStr;
 
 /// A [`Cell`] contains the [`Text`] to be displayed in a [`Row`] of a [`Table`].
 ///
diff --git a/helix-view/src/document.rs b/helix-view/src/document.rs
index 86f3dfb8..b917b902 100644
--- a/helix-view/src/document.rs
+++ b/helix-view/src/document.rs
@@ -70,7 +70,6 @@ pub enum IndentStyle {
 }
 
 pub struct Document {
-    // rope + selection
     pub(crate) id: DocumentId,
     text: Rope,
     pub(crate) selections: HashMap<ViewId, Selection>,
@@ -307,6 +306,19 @@ pub async fn to_writer<'a, W: tokio::io::AsyncWriteExt + Unpin + ?Sized>(
     Ok(())
 }
 
+/// Inserts the final line ending into `rope` if it's missing. [Why?](https://stackoverflow.com/questions/729692/why-should-text-files-end-with-a-newline)
+pub fn with_line_ending(rope: &mut Rope) -> LineEnding {
+    // search for line endings
+    let line_ending = auto_detect_line_ending(rope).unwrap_or(DEFAULT_LINE_ENDING);
+
+    // add missing newline at the end of file
+    if rope.len_bytes() == 0 || !char_is_line_ending(rope.char(rope.len_chars() - 1)) {
+        rope.insert(rope.len_chars(), line_ending.as_str());
+    }
+
+    line_ending
+}
+
 /// Like std::mem::replace() except it allows the replacement value to be mapped from the
 /// original value.
 fn take_with<T, F>(mut_ref: &mut T, closure: F)
@@ -395,12 +407,13 @@ pub fn normalize_path(path: &Path) -> PathBuf {
 /// This function is used instead of `std::fs::canonicalize` because we don't want to verify
 /// here if the path exists, just normalize it's components.
 pub fn canonicalize_path(path: &Path) -> std::io::Result<PathBuf> {
-    let normalized = normalize_path(path);
-    if normalized.is_absolute() {
-        Ok(normalized)
+    let path = if path.is_relative() {
+        std::env::current_dir().map(|current_dir| current_dir.join(path))?
     } else {
-        std::env::current_dir().map(|current_dir| current_dir.join(normalized))
-    }
+        path.to_path_buf()
+    };
+
+    Ok(normalize_path(&path))
 }
 
 use helix_lsp::lsp;
@@ -448,7 +461,8 @@ impl Document {
         }
 
         let mut file = std::fs::File::open(&path).context(format!("unable to open {:?}", path))?;
-        let (rope, encoding) = from_reader(&mut file, encoding)?;
+        let (mut rope, encoding) = from_reader(&mut file, encoding)?;
+        let line_ending = with_line_ending(&mut rope);
 
         let mut doc = Self::from(rope, Some(encoding));
 
@@ -458,9 +472,9 @@ impl Document {
             doc.detect_language(theme, loader);
         }
 
-        // Detect indentation style and line ending.
+        // Detect indentation style and set line ending.
         doc.detect_indent_style();
-        doc.line_ending = auto_detect_line_ending(&doc.text).unwrap_or(DEFAULT_LINE_ENDING);
+        doc.line_ending = line_ending;
 
         Ok(doc)
     }
@@ -578,6 +592,45 @@ impl Document {
         }
     }
 
+    /// Reload the document from its path.
+    pub fn reload(&mut self, view_id: ViewId) -> Result<(), Error> {
+        let encoding = &self.encoding;
+        let path = self.path().filter(|path| path.exists());
+
+        // If there is no path or the path no longer exists.
+        if path.is_none() {
+            return Err(anyhow!("can't find file to reload from"));
+        }
+
+        let mut file = std::fs::File::open(path.unwrap())?;
+        let (mut rope, ..) = from_reader(&mut file, Some(encoding))?;
+        let line_ending = with_line_ending(&mut rope);
+
+        let transaction = helix_core::diff::compare_ropes(self.text(), &rope);
+        self.apply(&transaction, view_id);
+        self.append_changes_to_history(view_id);
+
+        // Detect indentation style and set line ending.
+        self.detect_indent_style();
+        self.line_ending = line_ending;
+
+        Ok(())
+    }
+
+    /// Sets the [`Document`]'s encoding with the encoding correspondent to `label`.
+    pub fn set_encoding(&mut self, label: &str) -> Result<(), Error> {
+        match encoding_rs::Encoding::for_label(label.as_bytes()) {
+            Some(encoding) => self.encoding = encoding,
+            None => return Err(anyhow::anyhow!("unknown encoding")),
+        }
+        Ok(())
+    }
+
+    /// Returns the [`Document`]'s current encoding.
+    pub fn encoding(&self) -> &'static encoding_rs::Encoding {
+        self.encoding
+    }
+
     fn detect_indent_style(&mut self) {
         // Build a histogram of the indentation *increases* between
         // subsequent lines, ignoring lines that are all whitespace.
@@ -996,14 +1049,11 @@ impl Document {
         let cwdir = std::env::current_dir().expect("couldn't determine current directory");
 
         self.path.as_ref().map(|path| {
-            let path = fold_home_dir(path);
-            if path.is_relative() {
-                path
-            } else {
-                path.strip_prefix(cwdir)
-                    .map(|p| p.to_path_buf())
-                    .unwrap_or(path)
-            }
+            let mut path = path.as_path();
+            if path.is_absolute() {
+                path = path.strip_prefix(cwdir).unwrap_or(path)
+            };
+            fold_home_dir(path)
         })
     }
 
diff --git a/helix-view/src/editor.rs b/helix-view/src/editor.rs
index a16cc50f..4f01cce4 100644
--- a/helix-view/src/editor.rs
+++ b/helix-view/src/editor.rs
@@ -1,6 +1,7 @@
 use crate::{
     clipboard::{get_clipboard_provider, ClipboardProvider},
     graphics::{CursorKind, Rect},
+    info::Info,
     theme::{self, Theme},
     tree::Tree,
     Document, DocumentId, RegisterSelection, View, ViewId,
@@ -32,6 +33,7 @@ pub struct Editor {
     pub syn_loader: Arc<syntax::Loader>,
     pub theme_loader: Arc<theme::Loader>,
 
+    pub autoinfo: Option<&'static Info>,
     pub status_msg: Option<(String, Severity)>,
 }
 
@@ -64,6 +66,7 @@ impl Editor {
             theme_loader: themes,
             registers: Registers::default(),
             clipboard_provider: get_clipboard_provider(),
+            autoinfo: None,
             status_msg: None,
         }
     }
diff --git a/helix-view/src/info.rs b/helix-view/src/info.rs
new file mode 100644
index 00000000..f3df50fe
--- /dev/null
+++ b/helix-view/src/info.rs
@@ -0,0 +1,57 @@
+use crate::input::KeyEvent;
+use helix_core::unicode::width::UnicodeWidthStr;
+use std::fmt::Write;
+
+#[derive(Debug)]
+/// Info box used in editor. Rendering logic will be in other crate.
+pub struct Info {
+    /// Title kept as static str for now.
+    pub title: &'static str,
+    /// Text body, should contains newline.
+    pub text: String,
+    /// Body width.
+    pub width: u16,
+    /// Body height.
+    pub height: u16,
+}
+
+impl Info {
+    pub fn key(title: &'static str, body: Vec<(&[KeyEvent], &'static str)>) -> Info {
+        let (lpad, mpad, rpad) = (1, 2, 1);
+        let keymaps_width: u16 = body
+            .iter()
+            .map(|r| r.0.iter().map(|e| e.width() as u16 + 2).sum::<u16>() - 2)
+            .max()
+            .unwrap();
+        let mut text = String::new();
+        let mut width = 0;
+        let height = body.len() as u16;
+        for (keyevents, desc) in body {
+            let keyevent = keyevents[0];
+            let mut left = keymaps_width - keyevent.width() as u16;
+            for _ in 0..lpad {
+                text.push(' ');
+            }
+            write!(text, "{}", keyevent).ok();
+            for keyevent in &keyevents[1..] {
+                write!(text, ", {}", keyevent).ok();
+                left -= 2 + keyevent.width() as u16;
+            }
+            for _ in 0..left + mpad {
+                text.push(' ');
+            }
+            let desc = desc.trim();
+            let w = lpad + keymaps_width + mpad + (desc.width() as u16) + rpad;
+            if w > width {
+                width = w;
+            }
+            writeln!(text, "{}", desc).ok();
+        }
+        Info {
+            title,
+            text,
+            width,
+            height,
+        }
+    }
+}
diff --git a/helix-view/src/input.rs b/helix-view/src/input.rs
index 5f61ce14..2847bb69 100644
--- a/helix-view/src/input.rs
+++ b/helix-view/src/input.rs
@@ -1,5 +1,6 @@
 //! Input event handling, currently backed by crossterm.
 use anyhow::{anyhow, Error};
+use helix_core::unicode::width::UnicodeWidthStr;
 use serde::de::{self, Deserialize, Deserializer};
 use std::fmt;
 
@@ -13,6 +14,32 @@ pub struct KeyEvent {
     pub modifiers: KeyModifiers,
 }
 
+pub(crate) mod keys {
+    pub(crate) const BACKSPACE: &str = "backspace";
+    pub(crate) const ENTER: &str = "ret";
+    pub(crate) const LEFT: &str = "left";
+    pub(crate) const RIGHT: &str = "right";
+    pub(crate) const UP: &str = "up";
+    pub(crate) const DOWN: &str = "down";
+    pub(crate) const HOME: &str = "home";
+    pub(crate) const END: &str = "end";
+    pub(crate) const PAGEUP: &str = "pageup";
+    pub(crate) const PAGEDOWN: &str = "pagedown";
+    pub(crate) const TAB: &str = "tab";
+    pub(crate) const BACKTAB: &str = "backtab";
+    pub(crate) const DELETE: &str = "del";
+    pub(crate) const INSERT: &str = "ins";
+    pub(crate) const NULL: &str = "null";
+    pub(crate) const ESC: &str = "esc";
+    pub(crate) const SPACE: &str = "space";
+    pub(crate) const LESS_THAN: &str = "lt";
+    pub(crate) const GREATER_THAN: &str = "gt";
+    pub(crate) const PLUS: &str = "plus";
+    pub(crate) const MINUS: &str = "minus";
+    pub(crate) const SEMICOLON: &str = "semicolon";
+    pub(crate) const PERCENT: &str = "percent";
+}
+
 impl fmt::Display for KeyEvent {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> std::fmt::Result {
         f.write_fmt(format_args!(
@@ -34,28 +61,29 @@ impl fmt::Display for KeyEvent {
             },
         ))?;
         match self.code {
-            KeyCode::Backspace => f.write_str("backspace")?,
-            KeyCode::Enter => f.write_str("ret")?,
-            KeyCode::Left => f.write_str("left")?,
-            KeyCode::Right => f.write_str("right")?,
-            KeyCode::Up => f.write_str("up")?,
-            KeyCode::Down => f.write_str("down")?,
-            KeyCode::Home => f.write_str("home")?,
-            KeyCode::End => f.write_str("end")?,
-            KeyCode::PageUp => f.write_str("pageup")?,
-            KeyCode::PageDown => f.write_str("pagedown")?,
-            KeyCode::Tab => f.write_str("tab")?,
-            KeyCode::BackTab => f.write_str("backtab")?,
-            KeyCode::Delete => f.write_str("del")?,
-            KeyCode::Insert => f.write_str("ins")?,
-            KeyCode::Null => f.write_str("null")?,
-            KeyCode::Esc => f.write_str("esc")?,
-            KeyCode::Char('<') => f.write_str("lt")?,
-            KeyCode::Char('>') => f.write_str("gt")?,
-            KeyCode::Char('+') => f.write_str("plus")?,
-            KeyCode::Char('-') => f.write_str("minus")?,
-            KeyCode::Char(';') => f.write_str("semicolon")?,
-            KeyCode::Char('%') => f.write_str("percent")?,
+            KeyCode::Backspace => f.write_str(keys::BACKSPACE)?,
+            KeyCode::Enter => f.write_str(keys::ENTER)?,
+            KeyCode::Left => f.write_str(keys::LEFT)?,
+            KeyCode::Right => f.write_str(keys::RIGHT)?,
+            KeyCode::Up => f.write_str(keys::UP)?,
+            KeyCode::Down => f.write_str(keys::DOWN)?,
+            KeyCode::Home => f.write_str(keys::HOME)?,
+            KeyCode::End => f.write_str(keys::END)?,
+            KeyCode::PageUp => f.write_str(keys::PAGEUP)?,
+            KeyCode::PageDown => f.write_str(keys::PAGEDOWN)?,
+            KeyCode::Tab => f.write_str(keys::TAB)?,
+            KeyCode::BackTab => f.write_str(keys::BACKTAB)?,
+            KeyCode::Delete => f.write_str(keys::DELETE)?,
+            KeyCode::Insert => f.write_str(keys::INSERT)?,
+            KeyCode::Null => f.write_str(keys::NULL)?,
+            KeyCode::Esc => f.write_str(keys::ESC)?,
+            KeyCode::Char(' ') => f.write_str(keys::SPACE)?,
+            KeyCode::Char('<') => f.write_str(keys::LESS_THAN)?,
+            KeyCode::Char('>') => f.write_str(keys::GREATER_THAN)?,
+            KeyCode::Char('+') => f.write_str(keys::PLUS)?,
+            KeyCode::Char('-') => f.write_str(keys::MINUS)?,
+            KeyCode::Char(';') => f.write_str(keys::SEMICOLON)?,
+            KeyCode::Char('%') => f.write_str(keys::PERCENT)?,
             KeyCode::F(i) => f.write_fmt(format_args!("F{}", i))?,
             KeyCode::Char(c) => f.write_fmt(format_args!("{}", c))?,
         };
@@ -63,34 +91,83 @@ impl fmt::Display for KeyEvent {
     }
 }
 
+impl UnicodeWidthStr for KeyEvent {
+    fn width(&self) -> usize {
+        use helix_core::unicode::width::UnicodeWidthChar;
+        let mut width = match self.code {
+            KeyCode::Backspace => keys::BACKSPACE.len(),
+            KeyCode::Enter => keys::ENTER.len(),
+            KeyCode::Left => keys::LEFT.len(),
+            KeyCode::Right => keys::RIGHT.len(),
+            KeyCode::Up => keys::UP.len(),
+            KeyCode::Down => keys::DOWN.len(),
+            KeyCode::Home => keys::HOME.len(),
+            KeyCode::End => keys::END.len(),
+            KeyCode::PageUp => keys::PAGEUP.len(),
+            KeyCode::PageDown => keys::PAGEDOWN.len(),
+            KeyCode::Tab => keys::TAB.len(),
+            KeyCode::BackTab => keys::BACKTAB.len(),
+            KeyCode::Delete => keys::DELETE.len(),
+            KeyCode::Insert => keys::INSERT.len(),
+            KeyCode::Null => keys::NULL.len(),
+            KeyCode::Esc => keys::ESC.len(),
+            KeyCode::Char(' ') => keys::SPACE.len(),
+            KeyCode::Char('<') => keys::LESS_THAN.len(),
+            KeyCode::Char('>') => keys::GREATER_THAN.len(),
+            KeyCode::Char('+') => keys::PLUS.len(),
+            KeyCode::Char('-') => keys::MINUS.len(),
+            KeyCode::Char(';') => keys::SEMICOLON.len(),
+            KeyCode::Char('%') => keys::PERCENT.len(),
+            KeyCode::F(1..=9) => 2,
+            KeyCode::F(_) => 3,
+            KeyCode::Char(c) => c.width().unwrap_or(0),
+        };
+        if self.modifiers.contains(KeyModifiers::SHIFT) {
+            width += 2;
+        }
+        if self.modifiers.contains(KeyModifiers::ALT) {
+            width += 2;
+        }
+        if self.modifiers.contains(KeyModifiers::CONTROL) {
+            width += 2;
+        }
+        width
+    }
+
+    fn width_cjk(&self) -> usize {
+        self.width()
+    }
+}
+
 impl std::str::FromStr for KeyEvent {
     type Err = Error;
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         let mut tokens: Vec<_> = s.split('-').collect();
         let code = match tokens.pop().ok_or_else(|| anyhow!("Missing key code"))? {
-            "backspace" => KeyCode::Backspace,
-            "space" => KeyCode::Char(' '),
-            "ret" => KeyCode::Enter,
-            "lt" => KeyCode::Char('<'),
-            "gt" => KeyCode::Char('>'),
-            "plus" => KeyCode::Char('+'),
-            "minus" => KeyCode::Char('-'),
-            "semicolon" => KeyCode::Char(';'),
-            "percent" => KeyCode::Char('%'),
-            "left" => KeyCode::Left,
-            "right" => KeyCode::Right,
-            "up" => KeyCode::Down,
-            "home" => KeyCode::Home,
-            "end" => KeyCode::End,
-            "pageup" => KeyCode::PageUp,
-            "pagedown" => KeyCode::PageDown,
-            "tab" => KeyCode::Tab,
-            "backtab" => KeyCode::BackTab,
-            "del" => KeyCode::Delete,
-            "ins" => KeyCode::Insert,
-            "null" => KeyCode::Null,
-            "esc" => KeyCode::Esc,
+            keys::BACKSPACE => KeyCode::Backspace,
+            keys::ENTER => KeyCode::Enter,
+            keys::LEFT => KeyCode::Left,
+            keys::RIGHT => KeyCode::Right,
+            keys::UP => KeyCode::Up,
+            keys::DOWN => KeyCode::Down,
+            keys::HOME => KeyCode::Home,
+            keys::END => KeyCode::End,
+            keys::PAGEUP => KeyCode::PageUp,
+            keys::PAGEDOWN => KeyCode::PageDown,
+            keys::TAB => KeyCode::Tab,
+            keys::BACKTAB => KeyCode::BackTab,
+            keys::DELETE => KeyCode::Delete,
+            keys::INSERT => KeyCode::Insert,
+            keys::NULL => KeyCode::Null,
+            keys::ESC => KeyCode::Esc,
+            keys::SPACE => KeyCode::Char(' '),
+            keys::LESS_THAN => KeyCode::Char('<'),
+            keys::GREATER_THAN => KeyCode::Char('>'),
+            keys::PLUS => KeyCode::Char('+'),
+            keys::MINUS => KeyCode::Char('-'),
+            keys::SEMICOLON => KeyCode::Char(';'),
+            keys::PERCENT => KeyCode::Char('%'),
             single if single.len() == 1 => KeyCode::Char(single.chars().next().unwrap()),
             function if function.len() > 1 && function.starts_with('F') => {
                 let function: String = function.chars().skip(1).collect();
diff --git a/helix-view/src/lib.rs b/helix-view/src/lib.rs
index caed2952..9bcc0b7d 100644
--- a/helix-view/src/lib.rs
+++ b/helix-view/src/lib.rs
@@ -5,6 +5,7 @@ pub mod clipboard;
 pub mod document;
 pub mod editor;
 pub mod graphics;
+pub mod info;
 pub mod input;
 pub mod keyboard;
 pub mod register_selection;
diff --git a/languages.toml b/languages.toml
index f7564c88..204a5987 100644
--- a/languages.toml
+++ b/languages.toml
@@ -165,6 +165,15 @@ roots = []
 
 indent = { tab-width = 4, unit = "\t" }
 
+[[language]]
+name = "julia"
+scope = "source.julia"
+injection-regex = "julia"
+file-types = ["jl"]
+roots = []
+language-server = { command = "julia", args = [ "--startup-file=no", "--history-file=no", "-e", "using LanguageServer;using Pkg;import StaticLint;import SymbolServer;env_path = dirname(Pkg.Types.Context().env.project_file);server = LanguageServer.LanguageServerInstance(stdin, stdout, env_path, \"\");server.runlinter = true;run(server);" ] }
+indent = { tab-width = 2, unit = "  " }
+
 # [[language]]
 # name = "haskell"
 # scope = "source.haskell"
diff --git a/runtime/queries/julia/folds.scm b/runtime/queries/julia/folds.scm
new file mode 100644
index 00000000..91eede5f
--- /dev/null
+++ b/runtime/queries/julia/folds.scm
@@ -0,0 +1,11 @@
+[
+ (module_definition)
+ (struct_definition)
+ (macro_definition)
+ (function_definition)
+ (compound_expression) ; begin blocks
+ (let_statement)
+ (if_statement)
+ (for_statement)
+ (while_statement)
+] @fold
diff --git a/runtime/queries/julia/highlights.scm b/runtime/queries/julia/highlights.scm
new file mode 100644
index 00000000..a53dabe5
--- /dev/null
+++ b/runtime/queries/julia/highlights.scm
@@ -0,0 +1,180 @@
+(identifier) @variable
+;; In case you want type highlighting based on Julia naming conventions (this might collide with mathematical notation)
+;((identifier) @type ; exception: mark `A_foo` sort of identifiers as variables
+  ;(match? @type "^[A-Z][^_]"))
+((identifier) @constant
+  (match? @constant "^[A-Z][A-Z_]{2}[A-Z_]*$"))
+
+[
+  (triple_string)
+  (string)
+] @string
+
+(string
+  prefix: (identifier) @constant.builtin)
+
+(macro_identifier) @function.macro
+(macro_identifier (identifier) @function.macro) ; for any one using the variable highlight
+(macro_definition
+  name: (identifier) @function.macro
+  ["macro" "end" @keyword])
+
+(field_expression
+  (identifier)
+  (identifier) @field .)
+
+(function_definition
+  name: (identifier) @function)
+(call_expression
+  (identifier) @function)
+(call_expression
+  (field_expression (identifier) @method .))
+(broadcast_call_expression
+  (identifier) @function)
+(broadcast_call_expression
+  (field_expression (identifier) @method .))
+(parameter_list
+  (identifier) @parameter)
+(parameter_list
+  (optional_parameter .
+    (identifier) @parameter))
+(typed_parameter
+  (identifier) @parameter
+  (identifier) @type)
+(type_parameter_list
+  (identifier) @type)
+(typed_parameter
+  (identifier) @parameter
+  (parameterized_identifier) @type)
+(function_expression
+  . (identifier) @parameter)
+(spread_parameter) @parameter
+(spread_parameter
+  (identifier) @parameter)
+(named_argument
+    . (identifier) @parameter)
+(argument_list
+  (typed_expression
+    (identifier) @parameter
+    (identifier) @type))
+(argument_list
+  (typed_expression
+    (identifier) @parameter
+    (parameterized_identifier) @type))
+
+;; Symbol expressions (:my-wanna-be-lisp-keyword)
+(quote_expression
+ (identifier)) @symbol
+
+;; Parsing error! foo (::Type) get's parsed as two quote expressions
+(argument_list 
+  (quote_expression
+    (quote_expression
+      (identifier) @type)))
+
+(type_argument_list
+  (identifier) @type)
+(parameterized_identifier (_)) @type
+(argument_list
+  (typed_expression . (identifier) @parameter))
+
+(typed_expression
+  (identifier) @type .)
+(typed_expression
+  (parameterized_identifier) @type .)
+
+(struct_definition
+  name: (identifier) @type)
+
+(number) @number
+(range_expression
+    (identifier) @number
+      (eq? @number "end"))
+(range_expression
+  (_
+    (identifier) @number
+      (eq? @number "end")))
+(coefficient_expression
+  (number)
+  (identifier) @constant.builtin)
+
+;; TODO: operators.
+;; Those are a bit difficult to implement since the respective nodes are hidden right now (_power_operator)
+;; and heavily use Unicode chars (support for those are bad in vim/lua regexes)
+;[;
+    ;(power_operator);
+    ;(times_operator);
+    ;(plus_operator);
+    ;(arrow_operator);
+    ;(comparison_operator);
+    ;(assign_operator);
+;] @operator ;
+
+"end" @keyword
+
+(if_statement
+  ["if" "end"] @conditional)
+(elseif_clause
+  ["elseif"] @conditional)
+(else_clause
+  ["else"] @conditional)
+(ternary_expression
+  ["?" ":"] @conditional)
+
+(function_definition ["function" "end"] @keyword.function)
+
+(comment) @comment
+
+[
+  "const"
+  "return"
+  "macro"
+  "struct"
+  "primitive"
+  "type"
+] @keyword
+
+((identifier) @keyword (#any-of? @keyword "global" "local"))
+
+(compound_expression
+  ["begin" "end"] @keyword)
+(try_statement
+  ["try" "end" ] @exception)
+(finally_clause
+  "finally" @exception)
+(catch_clause
+  "catch" @exception)
+(quote_statement
+  ["quote" "end"] @keyword)
+(let_statement
+  ["let" "end"] @keyword)
+(for_statement
+  ["for" "end"] @repeat)
+(while_statement
+  ["while" "end"] @repeat)
+(break_statement) @repeat
+(continue_statement) @repeat
+(for_binding
+  "in" @repeat)
+(for_clause
+  "for" @repeat)
+(do_clause
+  ["do" "end"] @keyword)
+
+(export_statement
+  ["export"] @include)
+
+[
+  "using"
+  "module"
+  "import"
+] @include
+
+((identifier) @include (#eq? @include "baremodule"))
+
+(((identifier) @constant.builtin) (match? @constant.builtin "^(nothing|Inf|NaN)$"))
+(((identifier) @boolean) (eq? @boolean "true"))
+(((identifier) @boolean) (eq? @boolean "false"))
+
+["::" ":" "." "," "..." "!"] @punctuation.delimiter
+["[" "]" "(" ")" "{" "}"] @punctuation.bracket
diff --git a/runtime/queries/julia/injections.scm b/runtime/queries/julia/injections.scm
new file mode 100644
index 00000000..be2412c0
--- /dev/null
+++ b/runtime/queries/julia/injections.scm
@@ -0,0 +1,5 @@
+; TODO: re-add when markdown is added.
+; ((triple_string) @markdown
+;   (#offset! @markdown 0 3 0 -3))
+
+(comment) @comment
diff --git a/runtime/queries/julia/locals.scm b/runtime/queries/julia/locals.scm
new file mode 100644
index 00000000..f8b34f71
--- /dev/null
+++ b/runtime/queries/julia/locals.scm
@@ -0,0 +1,59 @@
+
+(import_statement
+ (identifier) @definition.import)
+(variable_declaration
+ (identifier) @definition.var)
+(variable_declaration
+ (tuple_expression
+  (identifier) @definition.var))
+(for_binding
+ (identifier) @definition.var)
+(for_binding
+ (tuple_expression
+  (identifier) @definition.var))
+
+(assignment_expression
+ (tuple_expression
+  (identifier) @definition.var))
+(assignment_expression
+ (bare_tuple_expression
+  (identifier) @definition.var))
+(assignment_expression
+ (identifier) @definition.var)
+
+(type_parameter_list
+  (identifier) @definition.type)
+(type_argument_list
+  (identifier) @definition.type)
+(struct_definition
+  name: (identifier) @definition.type)
+
+(parameter_list
+ (identifier) @definition.parameter)
+(typed_parameter
+ (identifier) @definition.parameter
+ (identifier))
+(function_expression
+ . (identifier) @definition.parameter)
+(argument_list
+ (typed_expression
+  (identifier) @definition.parameter
+  (identifier)))
+(spread_parameter
+ (identifier) @definition.parameter)
+
+(function_definition
+ name: (identifier) @definition.function) @scope
+(macro_definition 
+ name: (identifier) @definition.macro) @scope
+
+(identifier) @reference
+
+[
+  (try_statement)
+  (finally_clause)
+  (quote_statement)
+  (let_statement)
+  (compound_expression)
+  (for_statement)
+] @scope
diff --git a/runtime/themes/onedark.toml b/runtime/themes/onedark.toml
index f478b05f..508109dd 100644
--- a/runtime/themes/onedark.toml
+++ b/runtime/themes/onedark.toml
@@ -29,16 +29,26 @@
 "warning" = { fg = "#e5c07b", modifiers = ['bold'] }
 "error" = { fg = "#e06c75", modifiers = ['bold'] }
 
-"ui.menu.selected" = { fg = "#282C34", bg = "#61AFEF" }
 "ui.background" = { fg = "#ABB2BF", bg = "#282C34" }
-"ui.help" = { bg = "#3E4452" }
+
+"ui.cursor" = { fg = "#ABB2BF", modifiers = ["reversed"] }
+"ui.cursor.primary" = { fg = "#ABB2BF", modifiers = ["reversed"] }
+"ui.cursor.match" = { fg = "#61AFEF", modifiers = ['underlined']}
+
+"ui.selection" = { bg = "#5C6370" }
+"ui.selection.primary" = { bg = "#3E4452" }
+
 "ui.linenr" = { fg = "#4B5263", modifiers = ['dim'] }
 "ui.linenr.selected" = { fg = "#ABB2BF" }
-"ui.popup" = { bg = "#3E4452" }
+
 "ui.statusline" = { fg = "#ABB2BF", bg = "#2C323C" }
-"ui.statusline.inactive" = { fg = "#ABB2Bf", bg = "#2C323C" }
-"ui.selection" = { bg = "#3E4452" }
+"ui.statusline.inactive" = { fg = "#5C6370", bg = "#2C323C" }
+
 "ui.text" = { fg = "#ABB2BF", bg = "#282C34" }
 "ui.text.focus" = { fg = "#ABB2BF", bg = "#2C323C", modifiers = ['bold'] }
+
+"ui.help" = { bg = "#3E4452" }
+"ui.popup" = { bg = "#3E4452" }
 "ui.window" = { bg = "#3E4452" }
-# "ui.cursor.match"  # TODO might want to override this because dimmed is not widely supported
+"ui.menu.selected" = { fg = "#282C34", bg = "#61AFEF" }
+