| // GWT code can be installed anywhere, but an iFrame is the best place if you |
| // want both variable isolation and runAsync support. Variable isolation is |
| // useful for avoiding conflicts with JavaScript libraries and critical if |
| // you want more than one GWT module on your page. The runAsync implementation |
| // will need to install additional chunks of code into the same iFrame later. |
| // |
| // By default, CrossSiteIFrameLinker will use this script to create the iFrame. |
| // It may be replaced by overriding CrossSiteIframeLinker.getJsInstallLocation() |
| // to return the name of a different resource file. The replacement script may |
| // optionally set this variable inside the iframe: |
| // |
| // $wnd - the location where the bootstrap module is defined. It should also |
| // be the location where the __gwtStatsEvent function is defined. |
| // If not set, the module will set $wnd to window.parent. |
| |
| var frameDoc; |
| |
| function getInstallLocationDoc() { |
| setupInstallLocation(); |
| return frameDoc; |
| } |
| |
| // This function is left for compatibility |
| // and may be used by custom linkers |
| function getInstallLocation() { |
| return getInstallLocationDoc().body; |
| } |
| |
| function setupInstallLocation() { |
| if (frameDoc) { return; } |
| // Create the script frame, making sure it's invisible, but not |
| // "display:none", which keeps some browsers from running code in it. |
| var scriptFrame = $doc.createElement('iframe'); |
| scriptFrame.id = '__MODULE_NAME__'; |
| scriptFrame.style.cssText = 'position:absolute; width:0; height:0; border:none; left: -1000px;' |
| + ' top: -1000px;'; |
| scriptFrame.tabIndex = -1; |
| $doc.body.appendChild(scriptFrame); |
| |
| frameDoc = scriptFrame.contentWindow.document; |
| |
| // The following code is needed for proper operation in Firefox, Safari, and |
| // Internet Explorer. |
| // |
| // In Firefox, this prevents the frame from re-loading asynchronously and |
| // throwing away the current document. |
| // |
| // In IE, it ensures that the <body> element is immediately available. |
| frameDoc.open(); |
| var doctype = (document.compatMode == 'CSS1Compat') ? '<!doctype html>' : ''; |
| frameDoc.write(doctype + '<html><head></head><body></body></html>'); |
| frameDoc.close(); |
| } |
