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Extract IndentGuideRenderer into a separate class
GitOrigin-RevId: 63f936407d95ed340b978fb7d4c6de4fbb8d94ab
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platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/IndentGuideRenderer.java
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| @@ -0,0 +1,137 @@ | ||
| package com.intellij.codeInsight.daemon.impl; | ||
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| import com.intellij.openapi.editor.*; | ||
| import com.intellij.openapi.editor.colors.EditorColors; | ||
| import com.intellij.openapi.editor.colors.EditorColorsScheme; | ||
| import com.intellij.openapi.editor.ex.EditorEx; | ||
| import com.intellij.openapi.editor.impl.EditorImpl; | ||
| import com.intellij.openapi.editor.impl.view.EditorPainter; | ||
| import com.intellij.openapi.editor.impl.view.VisualLinesIterator; | ||
| import com.intellij.openapi.editor.markup.CustomHighlighterRenderer; | ||
| import com.intellij.openapi.editor.markup.RangeHighlighter; | ||
| import com.intellij.ui.paint.LinePainter2D; | ||
| import com.intellij.util.text.CharArrayUtil; | ||
| import org.jetbrains.annotations.NotNull; | ||
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| import java.awt.*; | ||
| import java.util.List; | ||
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| public class IndentGuideRenderer implements CustomHighlighterRenderer { | ||
| @Override | ||
| public final void paint(@NotNull Editor editor, @NotNull RangeHighlighter highlighter, @NotNull Graphics g) { | ||
| int startOffset = highlighter.getStartOffset(); | ||
| final Document doc = highlighter.getDocument(); | ||
| if (startOffset >= doc.getTextLength()) return; | ||
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| final int endOffset = highlighter.getEndOffset(); | ||
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| int off; | ||
| int startLine = doc.getLineNumber(startOffset); | ||
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| final CharSequence chars = doc.getCharsSequence(); | ||
| do { | ||
| int start = doc.getLineStartOffset(startLine); | ||
| int end = doc.getLineEndOffset(startLine); | ||
| off = CharArrayUtil.shiftForward(chars, start, end, " \t"); | ||
| startLine--; | ||
| } | ||
| while (startLine > 1 && off < doc.getTextLength() && chars.charAt(off) == '\n'); | ||
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| final VisualPosition startPosition = editor.offsetToVisualPosition(off); | ||
| int indentColumn = startPosition.column; | ||
| if (indentColumn <= 0) return; | ||
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| final FoldingModel foldingModel = editor.getFoldingModel(); | ||
| if (foldingModel.isOffsetCollapsed(off)) return; | ||
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| final FoldRegion headerRegion = foldingModel.getCollapsedRegionAtOffset(doc.getLineEndOffset(doc.getLineNumber(off))); | ||
| final FoldRegion tailRegion = foldingModel.getCollapsedRegionAtOffset(doc.getLineStartOffset(doc.getLineNumber(endOffset))); | ||
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| if (tailRegion != null && tailRegion == headerRegion) return; | ||
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| final boolean selected = isSelected(editor, endOffset, off, indentColumn); | ||
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| int lineHeight = editor.getLineHeight(); | ||
| Point start = editor.visualPositionToXY(startPosition); | ||
| start.y += lineHeight; | ||
| final VisualPosition endPosition = editor.offsetToVisualPosition(endOffset); | ||
| Point end = editor.visualPositionToXY(endPosition); | ||
| int maxY = end.y; | ||
| if (endPosition.line == editor.offsetToVisualPosition(doc.getTextLength()).line) { | ||
| maxY += lineHeight; | ||
| } | ||
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| Rectangle clip = g.getClipBounds(); | ||
| if (clip != null) { | ||
| if (clip.y >= maxY || clip.y + clip.height <= start.y) { | ||
| return; | ||
| } | ||
| maxY = Math.min(maxY, clip.y + clip.height); | ||
| } | ||
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| if (start.y >= maxY) return; | ||
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| int targetX = Math.max(0, start.x + EditorPainter.getIndentGuideShift(editor)); | ||
| final EditorColorsScheme scheme = editor.getColorsScheme(); | ||
| g.setColor(scheme.getColor(selected ? EditorColors.SELECTED_INDENT_GUIDE_COLOR : EditorColors.INDENT_GUIDE_COLOR)); | ||
| // There is a possible case that indent line intersects soft wrap-introduced text. Example: | ||
| // this is a long line <soft-wrap> | ||
| // that| is soft-wrapped | ||
| // | | ||
| // | <- vertical indent | ||
| // | ||
| // Also it's possible that no additional intersections are added because of soft wrap: | ||
| // this is a long line <soft-wrap> | ||
| // | that is soft-wrapped | ||
| // | | ||
| // | <- vertical indent | ||
| // We want to use the following approach then: | ||
| // 1. Show only active indent if it crosses soft wrap-introduced text; | ||
| // 2. Show indent as is if it doesn't intersect with soft wrap-introduced text; | ||
| List<? extends SoftWrap> softWraps = ((EditorEx)editor).getSoftWrapModel().getRegisteredSoftWraps(); | ||
| if (selected || softWraps.isEmpty()) { | ||
| LinePainter2D.paint((Graphics2D)g, targetX, start.y, targetX, maxY - 1); | ||
| } | ||
| else { | ||
| int startY = start.y; | ||
| int startVisualLine = startPosition.line + 1; | ||
| if (clip != null && startY < clip.y) { | ||
| startY = clip.y; | ||
| startVisualLine = editor.yToVisualLine(clip.y); | ||
| } | ||
| VisualLinesIterator it = new VisualLinesIterator((EditorImpl)editor, startVisualLine); | ||
| while (!it.atEnd()) { | ||
| int currY = it.getY(); | ||
| if (currY >= startY) { | ||
| if (currY >= maxY) break; | ||
| if (it.startsWithSoftWrap()) { | ||
| SoftWrap softWrap = softWraps.get(it.getStartOrPrevWrapIndex()); | ||
| if (softWrap.getIndentInColumns() < indentColumn) { | ||
| if (startY < currY) { | ||
| LinePainter2D.paint((Graphics2D)g, targetX, startY, targetX, currY - 1); | ||
| } | ||
| startY = currY + lineHeight; | ||
| } | ||
| } | ||
| } | ||
| it.advance(); | ||
| } | ||
| if (startY < maxY) { | ||
| LinePainter2D.paint((Graphics2D)g, targetX, startY, targetX, maxY - 1); | ||
| } | ||
| } | ||
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| } | ||
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| protected boolean isSelected(@NotNull Editor editor, int endOffset, int off, int indentColumn) { | ||
| final IndentGuideDescriptor guide = editor.getIndentsModel().getCaretIndentGuide(); | ||
| if (guide == null) return false; | ||
| return isCaretOnGuide(editor, endOffset, off, indentColumn); | ||
| } | ||
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| protected final boolean isCaretOnGuide(@NotNull Editor editor, int endOffset, int off, int indentColumn) { | ||
| final CaretModel caretModel = editor.getCaretModel(); | ||
| final int caretOffset = caretModel.getOffset(); | ||
| return caretOffset >= off && caretOffset < endOffset && caretModel.getLogicalPosition().column == indentColumn; | ||
| } | ||
| } |
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