Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.g2d / src / org / simantics / g2d / element / handler / impl / TextEditorImpl.java

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/TextEditorImpl.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/TextEditorImpl.java
new file mode 100644 (file)
index 0000000..90239c3
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/TextEditorImpl.java
@@ -0,0 +1,117 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.g2d.element.handler.impl;\r
+\r
+import org.simantics.g2d.element.ElementUtils;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.TextEditor;\r
+import org.simantics.g2d.utils.TextSegment;\r
+import org.simantics.utils.datastructures.hints.IHintContext.Key;\r
+import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;\r
+\r
+public class TextEditorImpl implements TextEditor {\r
+\r
+    private static final long      serialVersionUID = 7183657432363119779L;\r
+\r
+    public static final TextEditor INSTANCE         = new TextEditorImpl();\r
+\r
+    public static final Key        ACTIVE           = new KeyOf(Boolean.class, "TEXT_EDITOR_ACTIVE");\r
+    public static final Key        TEXT             = new KeyOf(String.class, "TEXT_EDIT_TEXT");\r
+    public static final Key        MODIFIER         = new KeyOf(Modifier.class, "TEXT_MODIFIER");\r
+    public static final Key        TEXT_SELECTION   = new KeyOf(TextSegment.class, "TEXT_SELECTION");\r
+    public static final Key        CARET_POS        = new KeyOf(Integer.class, "CARET_POS");\r
+\r
+    @Override\r
+    public boolean isActive(IElement e) {\r
+        return ElementUtils.getHintOrDefault(e, ACTIVE, Boolean.FALSE);\r
+    }\r
+\r
+    @Override\r
+    public void setActive(IElement e, boolean value) {\r
+        ElementUtils.setOrRemoveHint(e, ACTIVE, value ? Boolean.TRUE : null);\r
+        if (!value) {\r
+            e.removeHint(CARET_POS);\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public String getText(IElement e) {\r
+        return e.getHint(TEXT);\r
+    }\r
+\r
+    @Override\r
+    public void setText(IElement e, String text) {\r
+        ElementUtils.setOrRemoveHint(e, TEXT, text);\r
+    }\r
+\r
+    @Override\r
+    public Modifier getModifier(IElement e) {\r
+        return e.getHint(MODIFIER);\r
+    }\r
+\r
+    @Override\r
+    public void setModifier(IElement e, org.simantics.g2d.element.handler.TextEditor.Modifier modifier) {\r
+        ElementUtils.setOrRemoveHint(e, MODIFIER, modifier);\r
+    }\r
+\r
+    @Override\r
+    public Integer getCaretPosition(IElement e) {\r
+        Integer pos = e.getHint(CARET_POS);\r
+        return pos;\r
+    }\r
+\r
+    @Override\r
+    public TextSegment getSelection(IElement e) {\r
+        return e.getHint(TEXT_SELECTION);\r
+    }\r
+\r
+    private static boolean isValidCaretPosition(String s, int pos) {\r
+        int l = s.length();\r
+        return pos >= 0 && pos <= l; \r
+    }\r
+\r
+    private static void assertValidCaretPosition(String s, int pos) {\r
+        boolean valid = isValidCaretPosition(s, pos);\r
+        if (!valid)\r
+            throw new IllegalArgumentException("caret position " + pos + " is out of bounds in text '" + s + "'");\r
+    }\r
+\r
+    @Override\r
+    public void setCaretPosition(IElement e, Integer position) {\r
+        if (position == null) {\r
+            e.removeHint(CARET_POS);\r
+        } else {\r
+            String text = getText(e);\r
+            Integer old = e.getHint(CARET_POS);\r
+            if (position.equals(old))\r
+                return;\r
+            assertValidCaretPosition(text, position);\r
+            e.setHint(CARET_POS, position);\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public void setSelection(IElement e, TextSegment segment) {\r
+        if (segment == null) {\r
+            e.removeHint(TEXT_SELECTION);\r
+        } else {\r
+            String text = getText(e);\r
+            TextSegment old = e.getHint(TEXT_SELECTION);\r
+            if (segment.equals(old))\r
+                return;\r
+            if (!segment.existsIn(text))\r
+                throw new IllegalArgumentException("segment " + segment + " does not exist in text '" + text + "'");\r
+            e.setHint(TEXT_SELECTION, segment);\r
+        }\r
+    }\r
+\r
+}\r