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Report correct utf-16 indices in Paragraph.getLineMetrics and Paragra…
…ph.update* (closes #47), removed Paragraph.updateText
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158 changes: 158 additions & 0 deletions
158
examples/lwjgl/src/main/java/org/jetbrains/skija/examples/lwjgl/ParagraphMetricsScene.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| package org.jetbrains.skija.examples.lwjgl; | ||
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| import org.jetbrains.skija.*; | ||
| import org.jetbrains.skija.shaper.*; | ||
| import org.jetbrains.skija.paragraph.*; | ||
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| public class ParagraphMetricsScene implements Scene { | ||
| public FontCollection fc = new FontCollection(); | ||
| public long lastUpdate = 0; | ||
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| public Font inter13; | ||
| public Paint detailsFill; | ||
| public Paint boundariesStroke; | ||
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| public ParagraphMetricsScene() { | ||
| fc.setDefaultFontManager(FontMgr.getDefault()); | ||
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| TypefaceFontProvider fm = new TypefaceFontProvider(); | ||
| Typeface jbMono = Typeface.makeFromFile("fonts/JetBrainsMono-Regular.ttf"); | ||
| fm.registerTypeface(jbMono); | ||
| Typeface inter = Typeface.makeFromFile("fonts/InterHinted-Regular.ttf"); | ||
| fm.registerTypeface(inter, "Interface"); | ||
| fc.setAssetFontManager(fm); | ||
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| inter13 = new Font(inter, 13); | ||
| detailsFill = new Paint().setColor(0xFFCC3333); | ||
| boundariesStroke = new Paint().setColor(0xFFFAA6B2).setMode(PaintMode.STROKE).setStrokeWidth(1f); | ||
| } | ||
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| @Override | ||
| public void draw(Canvas canvas, int width, int height, float dpi, int xpos, int ypos) { | ||
| canvas.translate(30, 30); | ||
| drawSelection(canvas, xpos - 30f, ypos - 30f); | ||
| canvas.translate(0, 30); | ||
| drawIndices(canvas); | ||
| } | ||
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| public void drawSelection(Canvas canvas, float dx, float dy) { | ||
| try (TextStyle defaultTs = new TextStyle().setFontSize(24).setColor(0xFF000000); | ||
| TextStyle largeTs = new TextStyle().setFontSize(36).setColor(0xFF000000); | ||
| TextStyle smallTs = new TextStyle().setFontSize(12).setColor(0xFF000000); | ||
| TextStyle ligaTs = new TextStyle().setFontSize(24).setColor(0xFF000000).setFontFamilies(new String[] { "Interface" }); | ||
| ParagraphStyle ps = new ParagraphStyle(); | ||
| ParagraphBuilder pb = new ParagraphBuilder(ps, fc); | ||
| ParagraphStyle ps2 = new ParagraphStyle().setAlignment(Alignment.RIGHT);) | ||
| { | ||
| // default style | ||
| pb.pushStyle(defaultTs); | ||
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| pb.addText("123 567 "); | ||
| pb.pushStyle(ligaTs); | ||
| pb.addText("<-> "); | ||
| pb.popStyle(); | ||
| pb.addText("👩 👩👩 🧑🏿 🧑🏿🧑🏿 👮♀️ 👮♀️👮♀️ 👩👩👧👧 👩👩👧👧👩👩👧👧\n"); | ||
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| pb.addText("The following "); | ||
| pb.pushStyle(largeTs); | ||
| pb.addText("sentence"); | ||
| pb.popStyle(); | ||
| pb.addText(" is true\n"); | ||
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| pb.pushStyle(largeTs); | ||
| pb.addText("The previous "); | ||
| pb.popStyle(); | ||
| pb.addText("sentence"); | ||
| pb.pushStyle(largeTs); | ||
| pb.addText(" is false\n"); | ||
| pb.popStyle(); | ||
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| pb.setParagraphStyle(ps2); | ||
| pb.pushStyle(defaultTs); | ||
| pb.addText("— Vicious circularity, \n"); | ||
| pb.pushStyle(smallTs); | ||
| pb.addText(" or infinite regress"); | ||
| pb.popStyle(); | ||
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| try (Paragraph p = pb.build();) { | ||
| p.layout(600f); | ||
|
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| // getLineMetrics | ||
| for (LineMetrics lm: p.getLineMetrics()) { | ||
| canvas.drawRect(Rect.makeXYWH((float) lm.getLeft(), | ||
| (float) (lm.getBaseline() - lm.getAscent()), | ||
| (float) lm.getWidth(), | ||
| (float) (lm.getAscent() + lm.getDescent())), boundariesStroke); | ||
| canvas.drawLine((float) lm.getLeft(), (float) lm.getBaseline(), (float) (lm.getLeft() + lm.getWidth()), (float) lm.getBaseline(), boundariesStroke); | ||
| } | ||
|
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| // getGlyphPositionAtCoordinate | ||
| int glyphx = p.getGlyphPositionAtCoordinate(dx, dy).getPosition(); | ||
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| try (var blue = new Paint().setColor(0x80b3d7ff); | ||
| var orange = new Paint().setColor(0x80ffd7b3);) { | ||
|
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| // getRectsForRange | ||
| for (TextBox box: p.getRectsForRange(0, glyphx, RectHeightMode.TIGHT, RectWidthMode.TIGHT)) { | ||
| canvas.drawRect(box.getRect(), blue); | ||
| } | ||
|
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| // getWordBoundary | ||
| IRange word = p.getWordBoundary(glyphx); | ||
| for (TextBox box: p.getRectsForRange(word.getStart(), word.getEnd(), RectHeightMode.TIGHT, RectWidthMode.TIGHT)) { | ||
| canvas.drawRect(box.getRect(), orange); | ||
| } | ||
| } | ||
| p.paint(canvas, 0, 0); | ||
| canvas.drawString("idx: " + glyphx, 630, 20, inter13, detailsFill); | ||
| canvas.translate(0, p.getHeight()); | ||
| } | ||
| } | ||
| } | ||
|
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| public void paintParagraph(Canvas canvas, Paragraph paragraph) { | ||
| paragraph.layout(600f); | ||
| paragraph.paint(canvas, 0, 0); | ||
| for (LineMetrics lm: paragraph.getLineMetrics()) { | ||
| canvas.drawRect(Rect.makeXYWH((float) lm.getLeft(), | ||
| (float) (lm.getBaseline() - lm.getAscent()), | ||
| (float) lm.getWidth(), | ||
| (float) (lm.getAscent() + lm.getDescent())), boundariesStroke); | ||
| canvas.drawLine((float) lm.getLeft(), (float) lm.getBaseline(), (float) (lm.getLeft() + lm.getWidth()), (float) lm.getBaseline(), boundariesStroke); | ||
|
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| canvas.drawString( | ||
| String.format("start=%d, end w/o space=%d, end=%d, end w/ newline=%d", | ||
| lm.getStartIndex(), | ||
| lm.getEndExcludingWhitespaces(), | ||
| lm.getEndIndex(), | ||
| lm.getEndIncludingNewline()), | ||
| 150, (float) lm.getBaseline(), inter13, detailsFill); | ||
| } | ||
| canvas.translate(0, paragraph.getHeight()); | ||
| } | ||
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| public void drawIndices(Canvas canvas) { | ||
| try (TextStyle defaultTs = new TextStyle().setFontSize(16).setColor(0xFF000000).setFontFamilies(new String[] { "Interface" }).setHeight(1.5f); | ||
| ParagraphStyle ps = new ParagraphStyle(); | ||
| ParagraphBuilder pb = new ParagraphBuilder(ps, fc);) | ||
| { | ||
| pb.pushStyle(defaultTs); | ||
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| String text = "12345\n" | ||
| + "абвгд\n" | ||
| + "space \n" | ||
| + "\\r\\n\r\n" | ||
| + "\\n\\n\n\n" | ||
| + "👩👩👩👩👩\n" | ||
| + "<-><->\n" | ||
| + "🧑🏿🧑🏿🧑🏿🧑🏿🧑🏿\n" | ||
| + "👮♀️👮♀️👮♀️👮♀️👮♀️\n" | ||
| + "👩👩👧👧👩👩👧👧👩👩👧👧👩👩👧👧👩👩👧👧"; | ||
|
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| pb.addText(text); | ||
| try (Paragraph paragraph = pb.build();) { | ||
| paintParagraph(canvas, paragraph); | ||
| } | ||
| } | ||
| } | ||
| } |
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