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-rw-r--r--src/main/model/css/CssParser.java64
-rw-r--r--src/main/model/html/ElementNode.java17
-rw-r--r--src/main/model/html/HtmlParser.java25
3 files changed, 63 insertions, 43 deletions
diff --git a/src/main/model/css/CssParser.java b/src/main/model/css/CssParser.java
index 25b6752..a382b14 100644
--- a/src/main/model/css/CssParser.java
+++ b/src/main/model/css/CssParser.java
@@ -4,7 +4,10 @@ import org.javatuples.*;
import java.util.*;
-/*
+/**
+ * This class represents the state of and implements an LL(1) CSS parser.
+ * For convenience, the following (slightly wrong) context-free grammar for CSS is below.
+ * <br>
* RULES ::= (RULE)+
* RULE ::= SELECTORS '{' (PROPERTY | (PROPERTY ';')*) '}'
* SELECTORS ::= SELECTOR (COMBINATOR SELECTOR)*
@@ -216,13 +219,14 @@ public class CssParser {
previousChar = '\0';
} else {
// possibly not the best way to handle this, may be better to keep the backslash
- currentValue = currentValue.substring(0, currentValue.length() - 2);
+ currentValue = currentValue.substring(0, currentValue.length() - 1);
currentValue += c;
previousChar = c;
}
break;
default:
currentValue += c;
+ previousChar = c;
break;
}
}
@@ -239,13 +243,14 @@ public class CssParser {
currentValue += c;
previousChar = '\0';
} else {
- currentValue = currentValue.substring(0, currentValue.length() - 2);
+ currentValue = currentValue.substring(0, currentValue.length() - 1);
currentValue += c;
previousChar = c;
}
break;
default:
currentValue += c;
+ previousChar = c;
break;
}
}
@@ -258,7 +263,7 @@ public class CssParser {
* REQUIRES: A string of the form [NUMBER][VALIDUNIT]
* EFFECTS: Returns a number, in pixels, that has been converted appropriately
*/
- private static double parseUnits(String input) {
+ public static double parseUnits(String input) {
String numbers = "";
String units = "";
// imagine making a language without iterable strings, fml
@@ -305,30 +310,29 @@ public class CssParser {
}
/*
- * body {
- * background-color: #f0f0f2;
- * margin: 0;
- * padding: 0;
- * font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI",
- * "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
- *
- * }
- * div {
- * width: 600px;
- * margin: 5em auto;
- * padding: 2em;
- * background-color: #fdfdff;
- * border-radius: 0.5em;
- * box-shadow: 2px 3px 7px 2px rgba(0,0,0,0.02);
- * }
- * a:link, a:visited {
- * color: #38488f;
- * text-decoration: none;
- * }
- * @media (max - width : 700px) {
- * div {
- * margin: 0 auto;
- * width: auto;
- * }
- * }
+body {
+ background-color: #f0f0f2;
+ margin: 0;
+ padding: 0;
+ font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI",
+ "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
+}
+div {
+ width: 600px;
+ margin: 5em auto;
+ padding: 2em;
+ background-color: #fdfdff;
+ border-radius: 0.5em;
+ box-shadow: 2px 3px 7px 2px rgba(0,0,0,0.02);
+}
+a:link, a:visited {
+ color: #38488f;
+ text-decoration: none;
+}
+@media (max - width : 700px) {
+ div {
+ margin: 0 auto;
+ width: auto;
+ }
+}
*/
diff --git a/src/main/model/html/ElementNode.java b/src/main/model/html/ElementNode.java
index a1ad90c..98995d0 100644
--- a/src/main/model/html/ElementNode.java
+++ b/src/main/model/html/ElementNode.java
@@ -28,7 +28,16 @@ public class ElementNode implements Node {
* MODIFIES: this
*/
public ElementNode(String tag, ArrayList<Pair<String, String>> attributes) {
- this(tag, attributes, new ArrayList<Node>());
+ this(tag, attributes, new ArrayList<>());
+ }
+
+ /**
+ * Overloads the constructor for ease of use. Should probably only be used for tests.
+ * EFFECTS: Constructs a new ElementNode from the arguments provided.
+ * MODIFIES: this
+ */
+ public ElementNode(String tag) {
+ this(tag, new ArrayList<>(), new ArrayList<>());
}
/**
@@ -43,12 +52,16 @@ public class ElementNode implements Node {
return this.tag;
}
+ public ArrayList<Pair<String, String>> getAttributes() {
+ return this.attributes;
+ }
+
public ArrayList<Node> getChildren() {
return this.children;
}
// We implement this method for easy debugging.
public String getData() {
- return getTag();
+ return getTag() + " " + getAttributes().toString();
}
}
diff --git a/src/main/model/html/HtmlParser.java b/src/main/model/html/HtmlParser.java
index e9dc0c4..bfdd57c 100644
--- a/src/main/model/html/HtmlParser.java
+++ b/src/main/model/html/HtmlParser.java
@@ -5,15 +5,18 @@ import java.util.*;
import model.util.Node;
import org.javatuples.*;
-/*
+/**
+ * This class represents the state of and implements an LL(1) HTML parser.
+ * For convenience, the following (defo wrong) context-free grammar for HTML is below.
+ * <br>
* HTML ::= '<!DOCTYPE html>' (NODE)*
- * NODE ::= '<'TAG (' ' WORD '=' ('"'TEXT'"' | TEXT))* '>' (NODE)* '</' TAG '>'
- * | '<'SINGLE_TAG (' ' WORD '=' ('"'TEXT'"' | TEXT))* ('>'|'/>')
+ * NODE ::= '<'TAG (' ' WORD '=' ('"'TEXT'"' | TEXT))* '>' (NODE)* '<\/' TAG '>'
+ * | '<'SELF_CLOSING_TAG (' ' WORD '=' ('"'TEXT'"' | TEXT))* ('>'|'/>')
* | (TEXT | NODE)*
* TEXT ::= UNICODE - {'"'} + {'\"'}
* TAG ::= 'body' | 'div' | ...
- * SINGLE_TAG ::= 'img' | ...
- * (note that \forall T \in SINGLE_TAG, T \notin TAG)
+ * SELF_CLOSING_TAG ::= 'img' | ...
+ * (note that \forall T \in SELF_CLOSING_TAG, T \notin TAG)
*/
public class HtmlParser {
@@ -216,16 +219,16 @@ public class HtmlParser {
*/
private void caseValue(char c) {
switch (c) {
- case '\'':
- state = ParserState.SINGLE_QUOTES;
+ case '\'': state = ParserState.SINGLE_QUOTES;
break;
- case '\"':
- state = ParserState.DOUBLE_QUOTES;
+ case '\"': state = ParserState.DOUBLE_QUOTES;
break;
case ' ': case '\n':
+ state = ParserState.KEY;
currentAttributes.add(new Pair<>(currentKey, currentValue));
currentKey = "";
currentValue = "";
+ break; // THE FOOTGUN DESIGN STRIKES AGAIN
case '>':
if (!currentKey.equals("") || !currentValue.equals("")) {
currentAttributes.add(new Pair<>(currentKey, currentValue));
@@ -251,7 +254,7 @@ public class HtmlParser {
state = ParserState.VALUE;
previousChar = '\0';
} else {
- currentValue = currentValue.substring(0, currentValue.length() - 2);
+ currentValue = currentValue.substring(0, currentValue.length() - 1);
currentValue += c;
previousChar = c;
}
@@ -274,7 +277,7 @@ public class HtmlParser {
state = ParserState.VALUE;
previousChar = '\0';
} else {
- currentValue = currentValue.substring(0, currentValue.length() - 2);
+ currentValue = currentValue.substring(0, currentValue.length() - 1);
currentValue += c;
previousChar = c;
}
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-23 02:51:45 +0000