Providing debug-useful implementation of toString and toSource.
git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@5082 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/user/src/com/google/gwt/core/client/JavaScriptObject.java b/user/src/com/google/gwt/core/client/JavaScriptObject.java
index 03f426c..5c2f9b8 100644
--- a/user/src/com/google/gwt/core/client/JavaScriptObject.java
+++ b/user/src/com/google/gwt/core/client/JavaScriptObject.java
@@ -1,12 +1,12 @@
/*
* Copyright 2008 Google Inc.
- *
+ *
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
- *
+ *
* http://www.apache.org/licenses/LICENSE-2.0
- *
+ *
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
@@ -28,12 +28,19 @@
public class JavaScriptObject {
/**
+ * Call the toSource() on the JSO
+ */
+ public native String toSource() /*-{
+ this.toSource ? this.toSource() : "NO SOURCE";
+ }-*/;
+
+ /**
* Returns a new array.
*/
public static native JavaScriptObject createArray() /*-{
return [];
}-*/;
-
+
/**
* Returns an empty function.
*/
@@ -59,7 +66,7 @@
/**
* A helper method to enable cross-casting from any {@link JavaScriptObject}
* type to any other {@link JavaScriptObject} type.
- *
+ *
* @param <T> the target type
* @return this object as a different type
*/
@@ -67,7 +74,7 @@
public final <T extends JavaScriptObject> T cast() {
return (T) this;
}
-
+
/**
* Returns <code>true</code> if the objects are JavaScript identical
* (triple-equals).
@@ -81,9 +88,9 @@
* Uses a monotonically increasing counter to assign a hash code to the
* underlying JavaScript object. Do not call this method on non-modifiable
* JavaScript objects.
- *
+ *
* TODO: if the underlying object defines a 'hashCode' method maybe use that?
- *
+ *
* @return the hash code of the object
*/
@Override
@@ -92,11 +99,46 @@
}
/**
- * Returns the results of calling <code>toString</code> in JavaScript on the
- * object, if the object implements toString; otherwise returns "[JavaScriptObject]".
+ * catch-all toString in lieu of a better mechanism.
+ * Basic assumption here is that this code is for debugging only!
*/
@Override
public final native String toString() /*-{
- return this.toString ? this.toString() : "[JavaScriptObject]";
+ var defined = function(m) { return typeof m != 'undefined'; };
+ var strip = function(s) { return s.replace(/\r\n/g, ""); };
+ // Output nodes that have outerHTML
+ if (defined(this.outerHTML))
+ return strip(this.outerHTML);
+ // Output nodes that have innerHTML
+ if (defined(this.innerHTML) && this.cloneNode) {
+ $doc.createElement('div').appendChild(this.cloneNode(true)).innerHTML;
+ }
+ // Output text nodes
+ if (defined(this.nodeType) && this.nodeType == 3) {
+ return "'" +
+ this.data.replace(/ /g, "\u25ab").replace(/\u00A0/, "\u25aa") +
+ "'";
+ }
+ // Output IE's TextRange (this code specific to IE7)
+ if (typeof defined(this.htmlText) && this.collapse) {
+ var html = this.htmlText;
+ if (html) {
+ return 'IETextRange [' + strip(html) + ']';
+ } else {
+ // NOTE(lars): using pasteHTML to place a | where the range is collapsed
+ // if *very* useful when debugging. It also, however, in certain very subtle
+ // circumstances change the range being toStringed! If you see different
+ // behaviour in debug vs. release builds (or if logging ranges changes the
+ // behaviour, comment out the 4 of the 6 lines below containing dup.
+ var dup = this.duplicate();
+ dup.pasteHTML('|');
+ var out = 'IETextRange ' + strip(this.parentElement().outerHTML);
+ dup.moveStart('character', -1);
+ dup.pasteHTML('');
+ return out;
+ }
+ }
+ return this.toString ? this.toString() : '[JavaScriptObject]';
}-*/;
+
}
