1 files changed, 80 insertions, 0 deletions
diff --git a/org.eclipse.jface.text.examples/src/org/eclipse/jface/text/examples/sources/inlined/ColorAnnotation.java b/org.eclipse.jface.text.examples/src/org/eclipse/jface/text/examples/sources/inlined/ColorAnnotation.java
new file mode 100644
index 00000000000..9af22ac48e1
--- /dev/null
+++ b/org.eclipse.jface.text.examples/src/org/eclipse/jface/text/examples/sources/inlined/ColorAnnotation.java
@@ -0,0 +1,80 @@
+/**
+ *  Copyright (c) 2017 Angelo ZERR.
+ *  All rights reserved. This program and the accompanying materials
+ *  are made available under the terms of the Eclipse Public License v1.0
+ *  which accompanies this distribution, and is available at
+ *  http://www.eclipse.org/legal/epl-v10.html
+ *
+ *  Contributors:
+ *  Angelo Zerr <angelo.zerr@gmail.com> - [CodeMining] Provide inline annotations support - Bug 527675
+ */
+package org.eclipse.jface.text.examples.sources.inlined;
+
+import org.eclipse.jface.text.Position;
+import org.eclipse.jface.text.source.inlined.LineContentAnnotation;
+import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.FontMetrics;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Rectangle;
+
+/**
+ * Color annotation displays a colorized square before the rgb declaration.
+ */
+public class ColorAnnotation extends LineContentAnnotation {
+
+	private Color color;
+
+	public ColorAnnotation(Position pos, StyledText styledText) {
+		super(pos, styledText);
+	}
+
+	@Override
+	public int getWidth() {
+		StyledText styledText = super.getTextWidget();
+		return getSquareWidth(styledText);
+	}
+
+	public void setColor(Color color) {
+		this.color = color;
+	}
+
+	@Override
+	public void draw(GC gc, StyledText textWidget, int offset, int length, Color color, int x, int y) {
+		int size = getSquareSize(gc.getFontMetrics());
+		Rectangle rect = new Rectangle(x, y, size, size);
+
+		// Fill square
+		gc.setBackground(this.color);
+		gc.fillRectangle(rect);
+
+		// Draw square box
+		gc.setForeground(textWidget.getForeground());
+		gc.drawRectangle(rect);
+	}
+
+	/**
+	 * Returns the colorized square size.
+	 *
+	 * @param fontMetrics
+	 * @return the colorized square size.
+	 */
+	public static int getSquareSize(FontMetrics fontMetrics) {
+		return fontMetrics.getHeight() - 2 * fontMetrics.getDescent();
+	}
+
+	/**
+	 * Compute width of square
+	 *
+	 * @param styledText
+	 * @return the width of square
+	 */
+	private static int getSquareWidth(StyledText styledText) {
+		GC gc = new GC(styledText);
+		FontMetrics fontMetrics = gc.getFontMetrics();
+		// width = 2 spaces + size width of square
+		int width = 2 * fontMetrics.getAverageCharWidth() + getSquareSize(fontMetrics);
+		gc.dispose();
+		return width;
+	}
+}