From 8695415fbfe927250f68e93793660e3c4e4a70b4 Mon Sep 17 00:00:00 2001
From: Blaž Hrastnik
Date: Sun, 13 Dec 2020 12:23:50 +0900
Subject: wip: Move to new rendering structure.

---
 helix-term/src/prompt.rs | 72 ++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 66 insertions(+), 6 deletions(-)

(limited to 'helix-term/src/prompt.rs')

diff --git a/helix-term/src/prompt.rs b/helix-term/src/prompt.rs
index 689eac66..4747c9f5 100644
--- a/helix-term/src/prompt.rs
+++ b/helix-term/src/prompt.rs
@@ -1,9 +1,7 @@
-use crate::{
-    application::Renderer,
-    compositor::{Component, Context, EventResult},
-};
+use crate::compositor::{Component, Context, EventResult};
 use crossterm::event::{Event, KeyCode, KeyEvent, KeyModifiers};
 use helix_view::Editor;
+use helix_view::Theme;
 use std::string::String;
 
 pub struct Prompt {
@@ -85,6 +83,68 @@ impl Prompt {
     }
 }
 
+use tui::{
+    buffer::Buffer as Surface,
+    layout::Rect,
+    style::{Color, Modifier, Style},
+};
+
+const BASE_WIDTH: u16 = 30;
+use crate::application::text_color;
+
+impl Prompt {
+    pub fn render_prompt(&self, area: Rect, surface: &mut Surface, theme: &Theme) {
+        // completion
+        if !self.completion.is_empty() {
+            // TODO: find out better way of clearing individual lines of the screen
+            let mut row = 0;
+            let mut col = 0;
+            let max_col = area.width / BASE_WIDTH;
+            let col_height = ((self.completion.len() as u16 + max_col - 1) / max_col);
+
+            for i in (3..col_height + 3) {
+                surface.set_string(
+                    0,
+                    area.height - i as u16,
+                    " ".repeat(area.width as usize),
+                    text_color(),
+                );
+            }
+            surface.set_style(
+                Rect::new(0, area.height - col_height - 2, area.width, col_height),
+                theme.get("ui.statusline"),
+            );
+            for (i, command) in self.completion.iter().enumerate() {
+                let color = if self.completion_selection_index.is_some()
+                    && i == self.completion_selection_index.unwrap()
+                {
+                    Style::default().bg(Color::Rgb(104, 060, 232))
+                } else {
+                    text_color()
+                };
+                surface.set_stringn(
+                    1 + col * BASE_WIDTH,
+                    area.height - col_height - 2 + row,
+                    &command,
+                    BASE_WIDTH as usize - 1,
+                    color,
+                );
+                row += 1;
+                if row > col_height - 1 {
+                    row = 0;
+                    col += 1;
+                }
+                if col > max_col {
+                    break;
+                }
+            }
+        }
+        // render buffer text
+        surface.set_string(1, area.height - 1, &self.prompt, text_color());
+        surface.set_string(2, area.height - 1, &self.line, text_color());
+    }
+}
+
 impl Component for Prompt {
     fn handle_event(&mut self, event: Event, cx: &mut Context) -> EventResult {
         let event = match event {
@@ -137,7 +197,7 @@ impl Component for Prompt {
         EventResult::Consumed(None)
     }
 
-    fn render(&mut self, renderer: &mut Renderer, cx: &mut Context) {
-        renderer.render_prompt(self, &cx.editor.theme)
+    fn render(&self, area: Rect, surface: &mut Surface, cx: &mut Context) {
+        self.render_prompt(area, surface, &cx.editor.theme)
     }
 }
-- 
cgit v1.2.3-70-g09d2