user/src/com/google/gwt/dom/client/DOMImplStandardBase.java - gwt - Git at Google

 /*
  * Copyright 2011 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
  * License for the specific language governing permissions and limitations under
  * the License.
  */
 package com.google.gwt.dom.client;

 import com.google.gwt.core.client.JavaScriptObject;

 /**
  * StandardBase implementation of {@link com.google.gwt.user.client.impl.DOMImpl}.
  */
 class DOMImplStandardBase extends DOMImplStandard {

   private static class ClientRect extends JavaScriptObject {

     protected ClientRect() {
     }

     public final int getLeft() {
       return toInt32(getSubPixelLeft());
     }

     public final int getTop() {
       return toInt32(getSubPixelTop());
     }

     private final native double getSubPixelLeft() /*-{
       return this.left;
     }-*/;

     private final native double getSubPixelTop() /*-{
       return this.top;
     }-*/;
   }

   private static native double getAbsoluteLeftUsingOffsets(Element elem) /*-{
     // Unattached elements and elements (or their ancestors) with style
     // 'display: none' have no offsetLeft.
     if (elem.offsetLeft == null) {
       return 0;
     }

     var left = 0;
     var doc = elem.ownerDocument;
     var curr = elem.parentNode;
     if (curr) {
       // This intentionally excludes body which has a null offsetParent.
       while (curr.offsetParent) {
         left -= curr.scrollLeft;

         // In RTL mode, offsetLeft is relative to the left edge of the
         // scrollable area when scrolled all the way to the right, so we need
         // to add back that difference.
         if (doc.defaultView.getComputedStyle(curr, '').getPropertyValue('direction') == 'rtl') {
           left += (curr.scrollWidth - curr.clientWidth);
         }

         curr = curr.parentNode;
       }
     }

     while (elem) {
       left += elem.offsetLeft;

       if (doc.defaultView.getComputedStyle(elem, '')['position'] == 'fixed') {
         left += doc.body.scrollLeft;
         return left;
       }

       // Safari 3 does not include borders with offsetLeft, so we need to add
       // the borders of the parent manually.
       var parent = elem.offsetParent;
       if (parent && $wnd.devicePixelRatio) {
         left += parseInt(doc.defaultView.getComputedStyle(parent, '').getPropertyValue('border-left-width'));
       }

       // Safari bug: a top-level absolutely positioned element includes the
       // body's offset position already.
       if (parent && (parent.tagName == 'BODY') &&
           (elem.style.position == 'absolute')) {
         break;
       }

       elem = parent;
     }
     return left;
   }-*/;

   private static native double getAbsoluteTopUsingOffsets(Element elem) /*-{
     // Unattached elements and elements (or their ancestors) with style
     // 'display: none' have no offsetTop.
     if (elem.offsetTop == null) {
       return 0;
     }

     var top = 0;
     var doc = elem.ownerDocument;
     var curr = elem.parentNode;
     if (curr) {
       // This intentionally excludes body which has a null offsetParent.
       while (curr.offsetParent) {
         top -= curr.scrollTop;
         curr = curr.parentNode;
       }
     }

     while (elem) {
       top += elem.offsetTop;

       if (doc.defaultView.getComputedStyle(elem, '')['position'] == 'fixed') {
         top += doc.body.scrollTop;
         return top;
       }

       // Safari 3 does not include borders with offsetTop, so we need to add the
       // borders of the parent manually.
       var parent = elem.offsetParent;
       if (parent && $wnd.devicePixelRatio) {
         top += parseInt(doc.defaultView.getComputedStyle(parent, '').getPropertyValue('border-top-width'));
       }

       // Safari bug: a top-level absolutely positioned element includes the
       // body's offset position already.
       if (parent && (parent.tagName == 'BODY') &&
           (elem.style.position == 'absolute')) {
         break;
       }

       elem = parent;
     }
     return top;
   }-*/;

   private static native ClientRect getBoundingClientRect(Element element) /*-{
     return element.getBoundingClientRect && element.getBoundingClientRect();
   }-*/;

   /**
    * The type property on a button element is read-only in safari, so we need to
    * set it using setAttribute.
    */
   @Override
   public native ButtonElement createButtonElement(Document doc, String type) /*-{
     var e = doc.createElement("BUTTON");
     e.setAttribute('type', type);
     return e;
   }-*/;

   @Override
   public native NativeEvent createKeyCodeEvent(Document doc, String type,
       boolean ctrlKey, boolean altKey, boolean shiftKey, boolean metaKey,
       int keyCode) /*-{
     var evt = this.@com.google.gwt.dom.client.DOMImplStandardBase::createKeyEvent(Lcom/google/gwt/dom/client/Document;Ljava/lang/String;ZZZZZZ)(doc, type, true, true, ctrlKey, altKey, shiftKey, metaKey)
     evt.keyCode = keyCode;
     return evt;
   }-*/;

   @Override
   @Deprecated
   public native NativeEvent createKeyEvent(Document doc, String type,
       boolean canBubble, boolean cancelable, boolean ctrlKey, boolean altKey,
       boolean shiftKey, boolean metaKey, int keyCode, int charCode) /*-{
     var evt = this.@com.google.gwt.dom.client.DOMImplStandardBase::createKeyEvent(Lcom/google/gwt/dom/client/Document;Ljava/lang/String;ZZZZZZ)(doc, type, canBubble, cancelable, ctrlKey, altKey, shiftKey, metaKey)
     evt.keyCode = keyCode;
     evt.charCode = charCode;
     return evt;
   }-*/;

   @Override
   public native NativeEvent createKeyPressEvent(Document doc,
       boolean ctrlKey, boolean altKey, boolean shiftKey, boolean metaKey,
       int charCode) /*-{
     var evt = this.@com.google.gwt.dom.client.DOMImplStandardBase::createKeyEvent(Lcom/google/gwt/dom/client/Document;Ljava/lang/String;ZZZZZZ)(doc, 'keypress', true, true, ctrlKey, altKey, shiftKey, metaKey)
     evt.charCode = charCode;
     return evt;
   }-*/;

   /**
    * Safari 2 does not support {@link ScriptElement#setText(String)}.
    */
   @Override
   public ScriptElement createScriptElement(Document doc, String source) {
     ScriptElement elem = (ScriptElement) createElement(doc, "script");
     elem.setInnerText(source);
     return elem;
   }

   @Override
   public native EventTarget eventGetCurrentTarget(NativeEvent event) /*-{
     return event.currentTarget || $wnd;
   }-*/;

   @Override
   public native int eventGetMouseWheelVelocityY(NativeEvent evt) /*-{
     return Math.round(-evt.wheelDelta / 40) || 0;
   }-*/;

   @Override
   public int getAbsoluteLeft(Element elem) {
     ClientRect rect = getBoundingClientRect(elem);
     double left = rect != null ? rect.getSubPixelLeft()
         + getScrollLeft(elem.getOwnerDocument())
         : getAbsoluteLeftUsingOffsets(elem);
     return toInt32(left);
   }

   @Override
   public int getAbsoluteTop(Element elem) {
     ClientRect rect = getBoundingClientRect(elem);
     double top = rect != null ? rect.getSubPixelTop()
         + getScrollTop(elem.getOwnerDocument())
         : getAbsoluteTopUsingOffsets(elem);
     return toInt32(top);
   }

   @Override
   public int getScrollLeft(Element elem) {
     if (!elem.hasTagName(BodyElement.TAG) && isRTL(elem)) {
       return super.getScrollLeft(elem)
           - (elem.getScrollWidth() - elem.getClientWidth());
     }
     return super.getScrollLeft(elem);
   }

   @Override
   public native int getTabIndex(Element elem) /*-{
     // tabIndex is undefined for divs and other non-focusable elements prior to
     // Safari 4.
     return typeof elem.tabIndex != 'undefined' ? elem.tabIndex : -1;
   }-*/;

   @Override
   public void setScrollLeft(Element elem, int left) {
     if (!elem.hasTagName(BodyElement.TAG) && isRTL(elem)) {
       left += elem.getScrollWidth() - elem.getClientWidth();
     }
     super.setScrollLeft(elem, left);
   }

   protected native boolean isRTL(Element elem) /*-{
     return elem.ownerDocument.defaultView.getComputedStyle(elem, '').direction == 'rtl';
   }-*/;

   private native NativeEvent createKeyEvent(Document doc, String type,
       boolean canBubble, boolean cancelable, boolean ctrlKey, boolean altKey,
       boolean shiftKey, boolean metaKey) /*-{
     // WebKit's KeyboardEvent cannot set or even initialize charCode, keyCode, etc.
     // And UIEvent's charCode and keyCode are read-only.
     // So we "fake" an event using a raw Event and expandos
     var evt = doc.createEvent('Event');
     evt.initEvent(type, canBubble, cancelable);
     evt.ctrlKey = ctrlKey;
     evt.altKey = altKey;
     evt.shiftKey = shiftKey;
     evt.metaKey = metaKey;
     return evt;
   }-*/;
 }
	/*
	* Copyright 2011 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
	* License for the specific language governing permissions and limitations under
	* the License.
	*/
	package com.google.gwt.dom.client;

	import com.google.gwt.core.client.JavaScriptObject;

	/**
	* StandardBase implementation of {@link com.google.gwt.user.client.impl.DOMImpl}.
	*/
	class DOMImplStandardBase extends DOMImplStandard {

	private static class ClientRect extends JavaScriptObject {

	protected ClientRect() {
	}

	public final int getLeft() {
	return toInt32(getSubPixelLeft());
	}

	public final int getTop() {
	return toInt32(getSubPixelTop());
	}

	private final native double getSubPixelLeft() /*-{
	return this.left;
	}-*/;

	private final native double getSubPixelTop() /*-{
	return this.top;
	}-*/;
	}

	private static native double getAbsoluteLeftUsingOffsets(Element elem) /*-{
	// Unattached elements and elements (or their ancestors) with style
	// 'display: none' have no offsetLeft.
	if (elem.offsetLeft == null) {
	return 0;
	}

	var left = 0;
	var doc = elem.ownerDocument;
	var curr = elem.parentNode;
	if (curr) {
	// This intentionally excludes body which has a null offsetParent.
	while (curr.offsetParent) {
	left -= curr.scrollLeft;

	// In RTL mode, offsetLeft is relative to the left edge of the
	// scrollable area when scrolled all the way to the right, so we need
	// to add back that difference.
	if (doc.defaultView.getComputedStyle(curr, '').getPropertyValue('direction') == 'rtl') {
	left += (curr.scrollWidth - curr.clientWidth);
	}

	curr = curr.parentNode;
	}
	}

	while (elem) {
	left += elem.offsetLeft;

	if (doc.defaultView.getComputedStyle(elem, '')['position'] == 'fixed') {
	left += doc.body.scrollLeft;
	return left;
	}

	// Safari 3 does not include borders with offsetLeft, so we need to add
	// the borders of the parent manually.
	var parent = elem.offsetParent;
	if (parent && $wnd.devicePixelRatio) {
	left += parseInt(doc.defaultView.getComputedStyle(parent, '').getPropertyValue('border-left-width'));
	}

	// Safari bug: a top-level absolutely positioned element includes the
	// body's offset position already.
	if (parent && (parent.tagName == 'BODY') &&
	(elem.style.position == 'absolute')) {
	break;
	}

	elem = parent;
	}
	return left;
	}-*/;

	private static native double getAbsoluteTopUsingOffsets(Element elem) /*-{
	// Unattached elements and elements (or their ancestors) with style
	// 'display: none' have no offsetTop.
	if (elem.offsetTop == null) {
	return 0;
	}

	var top = 0;
	var doc = elem.ownerDocument;
	var curr = elem.parentNode;
	if (curr) {
	// This intentionally excludes body which has a null offsetParent.
	while (curr.offsetParent) {
	top -= curr.scrollTop;
	curr = curr.parentNode;
	}
	}

	while (elem) {
	top += elem.offsetTop;

	if (doc.defaultView.getComputedStyle(elem, '')['position'] == 'fixed') {
	top += doc.body.scrollTop;
	return top;
	}

	// Safari 3 does not include borders with offsetTop, so we need to add the
	// borders of the parent manually.
	var parent = elem.offsetParent;
	if (parent && $wnd.devicePixelRatio) {
	top += parseInt(doc.defaultView.getComputedStyle(parent, '').getPropertyValue('border-top-width'));
	}

	// Safari bug: a top-level absolutely positioned element includes the
	// body's offset position already.
	if (parent && (parent.tagName == 'BODY') &&
	(elem.style.position == 'absolute')) {
	break;
	}

	elem = parent;
	}
	return top;
	}-*/;

	private static native ClientRect getBoundingClientRect(Element element) /*-{
	return element.getBoundingClientRect && element.getBoundingClientRect();
	}-*/;

	/**
	* The type property on a button element is read-only in safari, so we need to
	* set it using setAttribute.
	*/
	@Override
	public native ButtonElement createButtonElement(Document doc, String type) /*-{
	var e = doc.createElement("BUTTON");
	e.setAttribute('type', type);
	return e;
	}-*/;

	@Override
	public native NativeEvent createKeyCodeEvent(Document doc, String type,
	boolean ctrlKey, boolean altKey, boolean shiftKey, boolean metaKey,
	int keyCode) /*-{
	var evt = this.@com.google.gwt.dom.client.DOMImplStandardBase::createKeyEvent(Lcom/google/gwt/dom/client/Document;Ljava/lang/String;ZZZZZZ)(doc, type, true, true, ctrlKey, altKey, shiftKey, metaKey)
	evt.keyCode = keyCode;
	return evt;
	}-*/;

	@Override
	@Deprecated
	public native NativeEvent createKeyEvent(Document doc, String type,
	boolean canBubble, boolean cancelable, boolean ctrlKey, boolean altKey,
	boolean shiftKey, boolean metaKey, int keyCode, int charCode) /*-{
	var evt = this.@com.google.gwt.dom.client.DOMImplStandardBase::createKeyEvent(Lcom/google/gwt/dom/client/Document;Ljava/lang/String;ZZZZZZ)(doc, type, canBubble, cancelable, ctrlKey, altKey, shiftKey, metaKey)
	evt.keyCode = keyCode;
	evt.charCode = charCode;
	return evt;
	}-*/;

	@Override
	public native NativeEvent createKeyPressEvent(Document doc,
	boolean ctrlKey, boolean altKey, boolean shiftKey, boolean metaKey,
	int charCode) /*-{
	var evt = this.@com.google.gwt.dom.client.DOMImplStandardBase::createKeyEvent(Lcom/google/gwt/dom/client/Document;Ljava/lang/String;ZZZZZZ)(doc, 'keypress', true, true, ctrlKey, altKey, shiftKey, metaKey)
	evt.charCode = charCode;
	return evt;
	}-*/;

	/**
	* Safari 2 does not support {@link ScriptElement#setText(String)}.
	*/
	@Override
	public ScriptElement createScriptElement(Document doc, String source) {
	ScriptElement elem = (ScriptElement) createElement(doc, "script");
	elem.setInnerText(source);
	return elem;
	}

	@Override
	public native EventTarget eventGetCurrentTarget(NativeEvent event) /*-{
	return event.currentTarget \|\| $wnd;
	}-*/;

	@Override
	public native int eventGetMouseWheelVelocityY(NativeEvent evt) /*-{
	return Math.round(-evt.wheelDelta / 40) \|\| 0;
	}-*/;

	@Override
	public int getAbsoluteLeft(Element elem) {
	ClientRect rect = getBoundingClientRect(elem);
	double left = rect != null ? rect.getSubPixelLeft()
	+ getScrollLeft(elem.getOwnerDocument())
	: getAbsoluteLeftUsingOffsets(elem);
	return toInt32(left);
	}

	@Override
	public int getAbsoluteTop(Element elem) {
	ClientRect rect = getBoundingClientRect(elem);
	double top = rect != null ? rect.getSubPixelTop()
	+ getScrollTop(elem.getOwnerDocument())
	: getAbsoluteTopUsingOffsets(elem);
	return toInt32(top);
	}

	@Override
	public int getScrollLeft(Element elem) {
	if (!elem.hasTagName(BodyElement.TAG) && isRTL(elem)) {
	return super.getScrollLeft(elem)
	- (elem.getScrollWidth() - elem.getClientWidth());
	}
	return super.getScrollLeft(elem);
	}

	@Override
	public native int getTabIndex(Element elem) /*-{
	// tabIndex is undefined for divs and other non-focusable elements prior to
	// Safari 4.
	return typeof elem.tabIndex != 'undefined' ? elem.tabIndex : -1;
	}-*/;

	@Override
	public void setScrollLeft(Element elem, int left) {
	if (!elem.hasTagName(BodyElement.TAG) && isRTL(elem)) {
	left += elem.getScrollWidth() - elem.getClientWidth();
	}
	super.setScrollLeft(elem, left);
	}

	protected native boolean isRTL(Element elem) /*-{
	return elem.ownerDocument.defaultView.getComputedStyle(elem, '').direction == 'rtl';
	}-*/;

	private native NativeEvent createKeyEvent(Document doc, String type,
	boolean canBubble, boolean cancelable, boolean ctrlKey, boolean altKey,
	boolean shiftKey, boolean metaKey) /*-{
	// WebKit's KeyboardEvent cannot set or even initialize charCode, keyCode, etc.
	// And UIEvent's charCode and keyCode are read-only.
	// So we "fake" an event using a raw Event and expandos
	var evt = doc.createEvent('Event');
	evt.initEvent(type, canBubble, cancelable);
	evt.ctrlKey = ctrlKey;
	evt.altKey = altKey;
	evt.shiftKey = shiftKey;
	evt.metaKey = metaKey;
	return evt;
	}-*/;
	}