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Rich Internet Application Framework for GWT
/*
* Ext GWT - Ext for GWT
* Copyright(c) 2007, 2008, Ext JS, LLC.
* [email protected]
*
* http://extjs.com/license
*/
package com.extjs.gxt.ui.client;
import com.extjs.gxt.ui.client.Style.Scroll;
import com.extjs.gxt.ui.client.core.El;
import com.extjs.gxt.ui.client.util.Rectangle;
import com.extjs.gxt.ui.client.util.Size;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.Html;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.RootPanel;
/**
* Provides additional static methods that allow you to manipulate the browser's
* Document Object Model (DOM).
*
* @see DOM
*/
public class XDOM {
/**
* Returns true if the browser uses a visible box.
*/
public static boolean isVisibleBox;
static El bodyEl = new El(getBody());
private static int scrollBarHeight = Style.DEFAULT;
private static int AUTO_ID = 0;
private static int Z_INDEX = 1000;
static {
GXT.init();
isVisibleBox = isVisibleBoxInternal();
}
/**
* Creates an element form the given markup.
*
* @param html the markup
* @return the new element
*/
public static Element create(String html) {
Element div = DOM.createDiv();
DOM.setInnerHTML(div, html);
Element firstChild = DOM.getFirstChild(div);
// support text node creation
return (firstChild != null) ? firstChild : div;
}
/**
* Returns the body element.
*
* @return the body
*/
public static native Element getBody() /*-{
return $doc.body;
}-*/;
/**
* Returns the body El.
*
* @return the body
*/
public static El getBodyEl() {
return bodyEl;
}
/**
* Reloads the page.
*/
public native static void reload() /*-{
$wnd.location.reload();
}-*/;
/**
* Returns the body elements horizontal scroll.
*
* @return the scroll amount in pixels
*/
public static native int getBodyScrollLeft() /*-{
return $doc.body.scrollLeft;
}-*/;
/**
* Return the body elements vertical scroll.
*
* @return the scroll amount in pixels
*/
public static native int getBodyScrollTop() /*-{
return $doc.body.scrollTop;
}-*/;
/**
* Returns the element's bounds.
*
* @param elem the element
* @param content true to adjust for box model issues
* @return the elements bounds
*/
public static Rectangle getBounds(Element elem, boolean content) {
int x = DOM.getAbsoluteLeft(elem);
int y = DOM.getAbsoluteTop(elem);
int width = El.fly(elem).getWidth();
int height = El.fly(elem).getHeight();
if (content) {
x += El.fly(elem).getBorderWidth("l");
y += El.fly(elem).getBorderWidth("t");
width -= El.fly(elem).getFrameWidth("lr");
height -= El.fly(elem).getFrameWidth("tb");
}
width = Math.max(0, width);
height = Math.max(0, height);
return new Rectangle(x, y, width, height);
}
/**
* Returns the document element.
*
* @return the docuemnt
*/
public static native Element getDocument() /*-{
return $doc;
}-*/;
/**
* Returns the element with the unique id.
*
* @param id the id
* @return the element, or null if no match
*/
public static Element getElementById(String id) {
try {
return DOM.getElementById(id);
} catch (Exception e) {
return null;
}
}
/**
* Returns the HTML head element.
*
* @return the head
*/
public static native Element getHead() /*-{
return $doc.getElementsByTagName('head')[0];
}-*/;
/**
* Returns the width of the scroll bar.
*
* @return the scroll bar width
*/
public static int getScrollBarWidth() {
if (scrollBarHeight == Style.DEFAULT) {
scrollBarHeight = getScrollBarWidthInternal();
}
return scrollBarHeight;
}
/**
* Increments and returns the top z-index value.
*
* @return the z-index
*/
public static int getTopZIndex() {
return ++Z_INDEX;
}
/**
* Returns an unique id.
*
* @return the id
*/
public static String getUniqueId() {
return "my-" + AUTO_ID++;
}
/**
* Returns the viewports size.
*
* @return the size
*/
public static native Size getViewportSize() /*-{
var vw;
var vh;
if (typeof $wnd.innerWidth != 'undefined') {
vw = $wnd.innerWidth;
vh = $wnd.innerHeight;
} else if (typeof $doc.documentElement != 'undefined'
&& typeof $doc.documentElement.clientWidth !=
'undefined' && $doc.documentElement.clientWidth != 0) {
vw = $doc.documentElement.clientWidth;
vh = $doc.documentElement.clientHeight;
} else {
vw = $doc.getElementsByTagName('body')[0].clientWidth;
vh = $doc.getElementsByTagName('body')[0].clientHeight;
}
var size = @com.extjs.gxt.ui.client.util.Size::newInstance(II)(vw, vh);
return size;
}-*/;
/**
* Inserts this element after the passed element in the DOM.
*
* @param elem the element
* @param after the element to insert after
*/
public native static void insertAfter(Element elem, Element after) /*-{
after.parentNode.insertBefore(elem, after.nextSibling);
}-*/;
/**
* Sets the element's style name.
*
* @param elem the element
* @param style the style name
*/
public static void setStyleName(Element elem, String style) {
DOM.setElementProperty(elem, "className", style);
}
private static int getScrollBarWidthInternal() {
LayoutContainer wc = new LayoutContainer();
RootPanel.get().add(wc);
wc.el().setVisibility(false);
wc.setScrollMode(Scroll.AUTO);
wc.setSize(300, 300);
Html html = new Html("sdff");
html.setHeight("284");
html.setWidth("500");
wc.add(html);
int height = 17;
for (int i = 280; i < 300; i++) {
html.setHeight("" + i);
wc.setVScrollPosition(20);
if (wc.getVScrollPosition() == 1) {
height = 300 - i + 1;
}
}
RootPanel.get().remove(wc);
return height;
}
private static native boolean isVisibleBoxInternal() /*-{
if (!$wnd.isVisibleBox) {
var d = $wnd.document;
var test = d.createElement('div');
d.body.appendChild(test);
test.style.position = "absolute";
test.style.border = "2px solid";
test.style.height = "50";
$wnd.isVisibleValue = test.offsetHeight == 50 ? true : false;
$wnd.isVisibleBox = true;
d.body.removeChild(test);
}
return $wnd.isVisibleValue;
}-*/;
private XDOM() {
}
}