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324 lines
10 KiB
JavaScript
324 lines
10 KiB
JavaScript
define("dijit/_base/focus", [
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"dojo/_base/array", // array.forEach
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"dojo/dom", // dom.isDescendant
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"dojo/_base/lang", // lang.isArray
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"dojo/topic", // publish
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"dojo/_base/window", // win.doc win.doc.selection win.global win.global.getSelection win.withGlobal
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"../focus",
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"../main" // for exporting symbols to dijit
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], function(array, dom, lang, topic, win, focus, dijit){
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// module:
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// dijit/_base/focus
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var exports = {
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// summary:
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// Deprecated module to monitor currently focused node and stack of currently focused widgets.
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// New code should access dijit/focus directly.
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// _curFocus: DomNode
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// Currently focused item on screen
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_curFocus: null,
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// _prevFocus: DomNode
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// Previously focused item on screen
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_prevFocus: null,
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isCollapsed: function(){
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// summary:
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// Returns true if there is no text selected
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return dijit.getBookmark().isCollapsed;
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},
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getBookmark: function(){
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// summary:
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// Retrieves a bookmark that can be used with moveToBookmark to return to the same range
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var bm, rg, tg, sel = win.doc.selection, cf = focus.curNode;
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if(win.global.getSelection){
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//W3C Range API for selections.
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sel = win.global.getSelection();
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if(sel){
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if(sel.isCollapsed){
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tg = cf? cf.tagName : "";
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if(tg){
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//Create a fake rangelike item to restore selections.
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tg = tg.toLowerCase();
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if(tg == "textarea" ||
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(tg == "input" && (!cf.type || cf.type.toLowerCase() == "text"))){
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sel = {
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start: cf.selectionStart,
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end: cf.selectionEnd,
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node: cf,
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pRange: true
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};
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return {isCollapsed: (sel.end <= sel.start), mark: sel}; //Object.
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}
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}
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bm = {isCollapsed:true};
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if(sel.rangeCount){
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bm.mark = sel.getRangeAt(0).cloneRange();
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}
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}else{
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rg = sel.getRangeAt(0);
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bm = {isCollapsed: false, mark: rg.cloneRange()};
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}
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}
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}else if(sel){
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// If the current focus was a input of some sort and no selection, don't bother saving
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// a native bookmark. This is because it causes issues with dialog/page selection restore.
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// So, we need to create psuedo bookmarks to work with.
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tg = cf ? cf.tagName : "";
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tg = tg.toLowerCase();
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if(cf && tg && (tg == "button" || tg == "textarea" || tg == "input")){
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if(sel.type && sel.type.toLowerCase() == "none"){
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return {
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isCollapsed: true,
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mark: null
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}
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}else{
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rg = sel.createRange();
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return {
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isCollapsed: rg.text && rg.text.length?false:true,
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mark: {
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range: rg,
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pRange: true
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}
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};
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}
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}
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bm = {};
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//'IE' way for selections.
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try{
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// createRange() throws exception when dojo in iframe
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//and nothing selected, see #9632
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rg = sel.createRange();
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bm.isCollapsed = !(sel.type == 'Text' ? rg.htmlText.length : rg.length);
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}catch(e){
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bm.isCollapsed = true;
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return bm;
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}
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if(sel.type.toUpperCase() == 'CONTROL'){
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if(rg.length){
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bm.mark=[];
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var i=0,len=rg.length;
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while(i<len){
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bm.mark.push(rg.item(i++));
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}
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}else{
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bm.isCollapsed = true;
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bm.mark = null;
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}
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}else{
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bm.mark = rg.getBookmark();
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}
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}else{
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console.warn("No idea how to store the current selection for this browser!");
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}
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return bm; // Object
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},
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moveToBookmark: function(/*Object*/ bookmark){
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// summary:
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// Moves current selection to a bookmark
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// bookmark:
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// This should be a returned object from dijit.getBookmark()
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var _doc = win.doc,
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mark = bookmark.mark;
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if(mark){
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if(win.global.getSelection){
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//W3C Rangi API (FF, WebKit, Opera, etc)
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var sel = win.global.getSelection();
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if(sel && sel.removeAllRanges){
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if(mark.pRange){
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var n = mark.node;
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n.selectionStart = mark.start;
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n.selectionEnd = mark.end;
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}else{
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sel.removeAllRanges();
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sel.addRange(mark);
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}
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}else{
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console.warn("No idea how to restore selection for this browser!");
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}
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}else if(_doc.selection && mark){
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//'IE' way.
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var rg;
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if(mark.pRange){
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rg = mark.range;
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}else if(lang.isArray(mark)){
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rg = _doc.body.createControlRange();
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//rg.addElement does not have call/apply method, so can not call it directly
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//rg is not available in "range.addElement(item)", so can't use that either
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array.forEach(mark, function(n){
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rg.addElement(n);
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});
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}else{
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rg = _doc.body.createTextRange();
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rg.moveToBookmark(mark);
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}
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rg.select();
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}
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}
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},
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getFocus: function(/*Widget?*/ menu, /*Window?*/ openedForWindow){
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// summary:
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// Called as getFocus(), this returns an Object showing the current focus
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// and selected text.
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//
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// Called as getFocus(widget), where widget is a (widget representing) a button
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// that was just pressed, it returns where focus was before that button
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// was pressed. (Pressing the button may have either shifted focus to the button,
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// or removed focus altogether.) In this case the selected text is not returned,
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// since it can't be accurately determined.
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//
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// menu: dijit/_WidgetBase|{domNode: DomNode} structure
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// The button that was just pressed. If focus has disappeared or moved
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// to this button, returns the previous focus. In this case the bookmark
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// information is already lost, and null is returned.
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//
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// openedForWindow:
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// iframe in which menu was opened
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//
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// returns:
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// A handle to restore focus/selection, to be passed to `dijit.focus`
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var node = !focus.curNode || (menu && dom.isDescendant(focus.curNode, menu.domNode)) ? dijit._prevFocus : focus.curNode;
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return {
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node: node,
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bookmark: node && (node == focus.curNode) && win.withGlobal(openedForWindow || win.global, dijit.getBookmark),
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openedForWindow: openedForWindow
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}; // Object
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},
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// _activeStack: dijit/_WidgetBase[]
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// List of currently active widgets (focused widget and it's ancestors)
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_activeStack: [],
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registerIframe: function(/*DomNode*/ iframe){
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// summary:
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// Registers listeners on the specified iframe so that any click
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// or focus event on that iframe (or anything in it) is reported
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// as a focus/click event on the `<iframe>` itself.
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// description:
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// Currently only used by editor.
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// returns:
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// Handle to pass to unregisterIframe()
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return focus.registerIframe(iframe);
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},
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unregisterIframe: function(/*Object*/ handle){
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// summary:
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// Unregisters listeners on the specified iframe created by registerIframe.
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// After calling be sure to delete or null out the handle itself.
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// handle:
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// Handle returned by registerIframe()
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handle && handle.remove();
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},
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registerWin: function(/*Window?*/targetWindow, /*DomNode?*/ effectiveNode){
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// summary:
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// Registers listeners on the specified window (either the main
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// window or an iframe's window) to detect when the user has clicked somewhere
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// or focused somewhere.
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// description:
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// Users should call registerIframe() instead of this method.
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// targetWindow:
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// If specified this is the window associated with the iframe,
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// i.e. iframe.contentWindow.
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// effectiveNode:
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// If specified, report any focus events inside targetWindow as
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// an event on effectiveNode, rather than on evt.target.
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// returns:
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// Handle to pass to unregisterWin()
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return focus.registerWin(targetWindow, effectiveNode);
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},
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unregisterWin: function(/*Handle*/ handle){
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// summary:
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// Unregisters listeners on the specified window (either the main
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// window or an iframe's window) according to handle returned from registerWin().
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// After calling be sure to delete or null out the handle itself.
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handle && handle.remove();
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}
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};
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// Override focus singleton's focus function so that dijit.focus()
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// has backwards compatible behavior of restoring selection (although
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// probably no one is using that).
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focus.focus = function(/*Object|DomNode */ handle){
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// summary:
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// Sets the focused node and the selection according to argument.
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// To set focus to an iframe's content, pass in the iframe itself.
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// handle:
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// object returned by get(), or a DomNode
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if(!handle){ return; }
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var node = "node" in handle ? handle.node : handle, // because handle is either DomNode or a composite object
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bookmark = handle.bookmark,
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openedForWindow = handle.openedForWindow,
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collapsed = bookmark ? bookmark.isCollapsed : false;
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// Set the focus
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// Note that for iframe's we need to use the <iframe> to follow the parentNode chain,
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// but we need to set focus to iframe.contentWindow
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if(node){
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var focusNode = (node.tagName.toLowerCase() == "iframe") ? node.contentWindow : node;
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if(focusNode && focusNode.focus){
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try{
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// Gecko throws sometimes if setting focus is impossible,
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// node not displayed or something like that
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focusNode.focus();
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}catch(e){/*quiet*/}
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}
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focus._onFocusNode(node);
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}
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// set the selection
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// do not need to restore if current selection is not empty
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// (use keyboard to select a menu item) or if previous selection was collapsed
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// as it may cause focus shift (Esp in IE).
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if(bookmark && win.withGlobal(openedForWindow || win.global, dijit.isCollapsed) && !collapsed){
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if(openedForWindow){
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openedForWindow.focus();
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}
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try{
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win.withGlobal(openedForWindow || win.global, dijit.moveToBookmark, null, [bookmark]);
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}catch(e2){
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/*squelch IE internal error, see http://trac.dojotoolkit.org/ticket/1984 */
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}
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}
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};
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// For back compatibility, monitor changes to focused node and active widget stack,
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// publishing events and copying changes from focus manager variables into dijit (top level) variables
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focus.watch("curNode", function(name, oldVal, newVal){
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dijit._curFocus = newVal;
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dijit._prevFocus = oldVal;
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if(newVal){
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topic.publish("focusNode", newVal); // publish
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}
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});
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focus.watch("activeStack", function(name, oldVal, newVal){
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dijit._activeStack = newVal;
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});
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focus.on("widget-blur", function(widget, by){
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topic.publish("widgetBlur", widget, by); // publish
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});
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focus.on("widget-focus", function(widget, by){
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topic.publish("widgetFocus", widget, by); // publish
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});
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lang.mixin(dijit, exports);
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/*===== return exports; =====*/
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return dijit; // for back compat :-(
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});
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