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123 changes: 121 additions & 2 deletions
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convex-gui/src/main/java/convex/gui/utils/CVXHighlighter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,7 +1,126 @@ | ||
| package convex.gui.utils; | ||
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| import java.awt.Color; | ||
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| import javax.swing.JTextPane; | ||
| import javax.swing.text.AttributeSet; | ||
| import javax.swing.text.SimpleAttributeSet; | ||
| import javax.swing.text.StyleConstants; | ||
| import javax.swing.text.StyleContext; | ||
| import javax.swing.text.StyledDocument; | ||
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| import org.antlr.v4.runtime.CharStream; | ||
| import org.antlr.v4.runtime.CharStreams; | ||
| import org.antlr.v4.runtime.CommonTokenStream; | ||
| import org.antlr.v4.runtime.Token; | ||
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| import convex.core.lang.reader.antlr.ConvexLexer; | ||
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| public class CVXHighlighter { | ||
| public static void highlight() { | ||
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| static StyleContext sc = StyleContext.getDefaultStyleContext(); | ||
| static AttributeSet BASE = sc.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Italic, false); | ||
| static AttributeSet ITALIC = sc.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Italic, true); | ||
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| static AttributeSet NORMAL = sc.addAttribute(BASE, StyleConstants.Foreground, Color.LIGHT_GRAY); | ||
| static AttributeSet STRING = sc.addAttribute(ITALIC, StyleConstants.Foreground, Color.CYAN); | ||
| static AttributeSet KEYWORD = sc.addAttribute(BASE, StyleConstants.Foreground, Color.PINK); | ||
| static AttributeSet SYMBOL = NORMAL; | ||
| static AttributeSet NUMBER = sc.addAttribute(BASE, StyleConstants.Foreground, Color.ORANGE); | ||
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| private static final AttributeSet[] PARENS = new AttributeSet[10]; | ||
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| static { | ||
| for (int i=0; i<PARENS.length; i++) { | ||
| Color c=Color.getHSBColor((0.1f*i), 1, 1); | ||
| c=c.brighter(); | ||
| AttributeSet aset = sc.addAttribute(BASE, StyleConstants.Foreground, c); | ||
| PARENS[i]=aset; | ||
| } | ||
| } | ||
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| public static void highlight(JTextPane inputArea, int start, int end) { | ||
| try { | ||
| // Get range of text to format | ||
| StyledDocument d=inputArea.getStyledDocument(); | ||
| int dlen=d.getLength(); | ||
| end=Math.min(end, dlen); // ensure in bounds | ||
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| String input=d.getText(start, end-start); | ||
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| CharStream cs=CharStreams.fromString(input); | ||
| ConvexLexer lexer=new ConvexLexer(cs); | ||
| lexer.removeErrorListeners(); | ||
| CommonTokenStream tokens = new CommonTokenStream(lexer); | ||
| tokens.fill(); | ||
| //ConvexParser parser = new ConvexParser(tokens); | ||
| //parser.removeErrorListeners(); | ||
| //ParseTree pt = parser.forms(); | ||
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| int tcount=tokens.size(); | ||
| int nest=0; | ||
| for (int i=0; i<tcount; i++) { | ||
| Token tok=tokens.get(i); | ||
| int tstart=start+tok.getStartIndex(); | ||
| int tend=start+tok.getStopIndex()+1; | ||
| int tlen=tend-tstart; | ||
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| if (tlen>0) { | ||
| char c=input.charAt(tstart-start); | ||
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| AttributeSet aset=NORMAL; | ||
| switch (c) { | ||
| case '"': { | ||
| aset=STRING; break; | ||
| } | ||
| case ':': { | ||
| aset=KEYWORD; break; | ||
| } | ||
| case '(':{ | ||
| aset=getParen(nest++); break; | ||
| } | ||
| case ')': { | ||
| aset=getParen(--nest); break; | ||
| } | ||
| case '[':{ | ||
| nest+=3; | ||
| aset=getParen(nest++); break; | ||
| } | ||
| case ']': { | ||
| aset=getParen(--nest); | ||
| nest-=3; break; | ||
| } | ||
| case '{':{ | ||
| nest+=6; | ||
| aset=getParen(nest++); break; | ||
| } | ||
| case '}': { | ||
| aset=getParen(--nest); | ||
| nest-=6; break; | ||
| } | ||
| // Whitespace uses paren colour, this colours commas! | ||
| case ' ': case '\t': case ',': { | ||
| aset=getParen(nest); | ||
| break; | ||
| } | ||
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| default: { | ||
| if (Character.isDigit(c)) { | ||
| aset=NUMBER; break; | ||
| } | ||
| } | ||
| } | ||
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| d.setCharacterAttributes(tstart, tlen, aset, false); | ||
| } | ||
| } | ||
| } catch (Exception t) { | ||
| t.printStackTrace(); | ||
| } | ||
| } | ||
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| private static AttributeSet getParen(int i) { | ||
| if (i<0) i=0; | ||
| return PARENS[i%PARENS.length]; | ||
| } | ||
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| } |