Initial version of LineWrapSquigglesStrategy - almost works.

diff --git a/.gitattributes b/.gitattributes
index ceda7ad327c2c68e810b08bce65179fc7162a8d1..2e3688a8730c09919343529c466d92fb8945bcfd 100644 (file)
--- a/.gitattributes
+++ b/.gitattributes
@@ -470,6 +470,7 @@ eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/IParent
 eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/IParserFeedback.java -text
 eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/ISelectionWrapper.java -text
 eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/LineBreakListener.java -text
+eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/LineWrapSquigglesStrategy.java -text
 eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/LineWrapSupport.java -text
 eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/MultiPageTaxonEditor.java -text
 eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/ParseListener.java -text

diff --git a/eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/LineWrapSquigglesStrategy.java b/eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/LineWrapSquigglesStrategy.java
new file mode 100644 (file)
index 0000000..e0ac138
--- /dev/null
+++ b/eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/LineWrapSquigglesStrategy.java
@@ -0,0 +1,132 @@
+/**\r
+* Copyright (C) 2007 EDIT\r
+* European Distributed Institute of Taxonomy \r
+* http://www.e-taxonomy.eu\r
+* \r
+* The contents of this file are subject to the Mozilla Public License Version 1.1\r
+* See LICENSE.TXT at the top of this package for the full license terms.\r
+*/\r
+\r
+package eu.etaxonomy.taxeditor.editor;\r
+\r
+import org.apache.log4j.Logger;\r
+import org.eclipse.jface.text.source.Annotation;\r
+import org.eclipse.jface.text.source.AnnotationPainter.SquigglesStrategy;\r
+import org.eclipse.swt.SWT;\r
+import org.eclipse.swt.custom.StyledText;\r
+import org.eclipse.swt.graphics.Color;\r
+import org.eclipse.swt.graphics.GC;\r
+import org.eclipse.swt.graphics.Point;\r
+\r
+/**\r
+ * Adds ability to draw multiline squiggles when a <code>StyledText</code>\r
+ * contains line-wrapping.\r
+ *  \r
+ * @author p.ciardelli\r
+ * @created 21.11.2008\r
+ * @version 1.0\r
+ */\r
+public class LineWrapSquigglesStrategy extends SquigglesStrategy {\r
+       private static final Logger logger = Logger\r
+                       .getLogger(LineWrapSquigglesStrategy.class);\r
+       \r
+       public static final String ID = "linewrap_squigglesstrategy";\r
+\r
+       private GC gc;\r
+\r
+       private Color color;\r
+\r
+       private int lineHeight;\r
+\r
+       private int baseline;\r
+       \r
+       public void draw(Annotation annotation, GC gc, StyledText textWidget, int offset, int length, Color color) {\r
+               \r
+               this.gc = gc;\r
+               this.color = color;\r
+               \r
+               if (gc != null) {\r
+\r
+                       if (length < 1)\r
+                               return;\r
+                       \r
+                       baseline = textWidget.getBaseline(offset);\r
+                       lineHeight = textWidget.getLineHeight(offset);\r
+                       \r
+                       Point right = null;\r
+                       int newLineOffset = 0;\r
+                       \r
+                       for (int i = 1; i <= length; i++) {\r
+                               \r
+                               // If the y of the current offset is different from that of the last offset,\r
+                               //      we are on a new line\r
+                               if (right != null && textWidget.getLocationAtOffset(i).y > right.y) {\r
+                                       \r
+                                       // Save last new line offset to draw squigglies under last line\r
+                                       newLineOffset = i;\r
+                                       \r
+                                       Point left = textWidget.getLocationAtOffset(offset);\r
+                                       \r
+                                       drawPolyline(left, right);\r
+                                       \r
+                                       offset += i;\r
+                               }\r
+                                                               \r
+                               right = textWidget.getLocationAtOffset(i);                                              \r
+                       }\r
+                       \r
+                       drawPolyline(textWidget.getLocationAtOffset(newLineOffset), right);\r
+\r
+               } else {\r
+                       textWidget.redrawRange(offset, length, true);\r
+               }\r
+       }\r
+       \r
+       private void drawPolyline(Point left, Point right) {\r
+               \r
+               int[] polyline= computePolyline(left, right, baseline, lineHeight);\r
+\r
+               gc.setLineWidth(0); // NOTE: 0 means width is 1 but with optimized performance\r
+               gc.setLineStyle(SWT.LINE_SOLID);\r
+               gc.setForeground(color);\r
+               gc.drawPolyline(polyline);\r
+       }\r
+\r
+       private int[] computePolyline(Point left, Point right, int baseline, int lineHeight) {\r
+\r
+               final int WIDTH= 4; // must be even\r
+               final int HEIGHT= 2; // can be any number\r
+\r
+               int peaks= (right.x - left.x) / WIDTH;\r
+               if (peaks == 0 && right.x - left.x > 2)\r
+                       peaks= 1;\r
+\r
+               int leftX= left.x;\r
+\r
+               // compute (number of point) * 2\r
+               int length= ((2 * peaks) + 1) * 2;\r
+               if (length < 0)\r
+                       return new int[0];\r
+\r
+               int[] coordinates= new int[length];\r
+\r
+               // cache peeks' y-coordinates\r
+               int top= left.y + Math.min(baseline + 1, lineHeight - HEIGHT - 1);\r
+               int bottom= top + HEIGHT;\r
+\r
+               // populate array with peek coordinates\r
+               for (int i= 0; i < peaks; i++) {\r
+                       int index= 4 * i;\r
+                       coordinates[index]= leftX + (WIDTH * i);\r
+                       coordinates[index+1]= bottom;\r
+                       coordinates[index+2]= coordinates[index] + WIDTH/2;\r
+                       coordinates[index+3]= top;\r
+               }\r
+\r
+               // the last down flank is missing\r
+               coordinates[length-2]= Math.min(Math.max(0, right.x - 1), left.x + (WIDTH * peaks));\r
+               coordinates[length-1]= bottom;\r
+\r
+               return coordinates;\r
+       }\r
+}\r