зеркало из https://github.com/mozilla/pjs.git
321 строка
9.3 KiB
JavaScript
321 строка
9.3 KiB
JavaScript
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Blake Ross <blaker@netscape.com> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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// helper routines, for doing rdf-based cut/copy/paste/etc
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// this needs to be more generic!
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const nsTransferable_contractid = "@mozilla.org/widget/transferable;1";
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const clipboard_contractid = "@mozilla.org/widget/clipboard;1";
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const rdf_contractid = "@mozilla.org/rdf/rdf-service;1";
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const supportswstring_contractid = "@mozilla.org/supports-wstring;1";
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const rdfc_contractid = "@mozilla.org/rdf/container;1";
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const nsISupportsWString = Components.interfaces.nsISupportsWString;
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const nsIClipboard = Components.interfaces.nsIClipboard;
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const nsITransferable = Components.interfaces.nsITransferable;
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const nsIRDFLiteral = Components.interfaces.nsIRDFLiteral;
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const nsIRDFContainer = Components.interfaces.nsIRDFContainer;
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var gRDF;
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var gClipboard;
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function isContainer(tree, index)
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{
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return tree.treeBoxObject.view.isContainer(index);
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}
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function isContainerOpen(tree, index)
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{
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return tree.treeBoxObject.view.isContainerOpen(index);
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}
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function nsTreeController_SetTransferData(transferable, flavor, text)
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{
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if (!text)
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return;
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var textData = Components.classes[supportswstring_contractid].createInstance(nsISupportsWString);
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textData.data = text;
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transferable.addDataFlavor(flavor);
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transferable.setTransferData(flavor, textData, text.length*2);
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}
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function nsTreeController_copy()
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{
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var rangeCount = this.treeSelection.getRangeCount();
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if (rangeCount < 1)
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return false;
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// Build a url that encodes all the select nodes
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// as well as their parent nodes
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var url = "";
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var text = "";
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var html = "";
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var min = new Object();
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var max = new Object();
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for (var i = rangeCount - 1; i >= 0; --i) {
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this.treeSelection.getRangeAt(i, min, max);
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for (var k = max.value; k >= min.value; --k) {
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// If one of the selected items is
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// a container, ignore it.
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if (isContainer(this.tree, k))
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continue;
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var pageUrl = this.treeView.getCellText(k, "URL");
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var pageName = this.treeView.getCellText(k, "Name");
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url += "ID:{" + pageUrl + "};";
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url += "NAME:{" + pageName + "};";
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text += pageUrl + "\r";
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html += "<a href='" + pageUrl + "'>";
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if (pageName) html += pageName;
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html += "</a><p>";
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}
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}
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if (!url)
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return false;
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// get some useful components
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var trans = Components.classes[nsTransferable_contractid].createInstance(nsITransferable);
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if (!gClipboard)
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gClipboard = Components.classes[clipboard_contractid].getService(Components.interfaces.nsIClipboard);
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gClipboard.emptyClipboard(nsIClipboard.kGlobalClipboard);
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this.SetTransferData(trans, "text/unicode", text);
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this.SetTransferData(trans, "moz/bookmarkclipboarditem", url);
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this.SetTransferData(trans, "text/html", html);
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gClipboard.setData(trans, null, nsIClipboard.kGlobalClipboard);
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return true;
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}
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function nsTreeController_cut()
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{
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if (this.copy()) {
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this.doDelete();
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return true; // copy succeeded, don't care if delete failed
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}
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return false; // copy failed, so did cut
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}
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function nsTreeController_selectAll()
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{
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this.treeSelection.selectAll();
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}
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function nsTreeController_delete()
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{
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var rangeCount = this.treeSelection.getRangeCount();
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if (rangeCount < 1)
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return false;
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var datasource = this.tree.database;
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var dsEnum = datasource.GetDataSources();
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dsEnum.getNext();
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var ds = dsEnum.getNext();
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var count = this.treeSelection.count;
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// XXX 9 is a random number, just looking for a sweetspot
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// don't want to rebuild tree content for just a few items
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if (count > 9)
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ds.QueryInterface(Components.interfaces.nsIBrowserHistory).startBatchUpdate();
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var min = new Object();
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var max = new Object();
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var dirty = false;
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for (var i = rangeCount - 1; i >= 0; --i) {
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this.treeSelection.getRangeAt(i, min, max);
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for (var k = max.value; k >= min.value; --k) {
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if (!gRDF)
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gRDF = Components.classes[rdf_contractid].getService(Components.interfaces.nsIRDFService);
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var IDRes = this.treeBuilder.getResourceAtIndex(k);
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if (!IDRes)
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continue;
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var root = this.tree.getAttribute('ref');
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var parentIDRes;
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try {
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parentIDRes = this.treeBuilder.getResourceAtIndex(this.treeView.getParentIndex(k));
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}
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catch(ex) {
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parentIDRes = gRDF.GetResource(root);
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}
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if (!parentIDRes)
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continue;
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// otherwise remove the parent/child assertion then
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var containment = gRDF.GetResource("http://home.netscape.com/NC-rdf#child");
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ds.QueryInterface(Components.interfaces.nsIRDFDataSource).Unassert(parentIDRes, containment, IDRes);
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dirty = true;
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}
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}
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if (dirty) {
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if (count > 9) {
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ds.QueryInterface(Components.interfaces.nsIBrowserHistory).endBatchUpdate();
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this.tree.builder.rebuild();
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}
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try {
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var remote = datasource.QueryInterface(Components.interfaces.nsIRDFRemoteDataSource);
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remote.Flush();
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} catch (ex) {
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}
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}
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if (max.value) {
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var newIndex = max.value - (max.value - min.value);
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if (newIndex >= this.treeView.rowCount)
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--newIndex;
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this.treeSelection.select(newIndex);
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}
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return true;
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}
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function nsTreeController(tree)
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{
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this._tree = tree;
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tree.controllers.appendController(this);
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}
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nsTreeController.prototype =
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{
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_treeSelection: null,
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_treeView: null,
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_treeBuilder: null,
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_treeBoxObject: null,
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_tree: null,
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get tree()
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{
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return this._tree;
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},
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get treeBoxObject()
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{
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if (this._treeBoxObject)
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return this._treeBoxObject;
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return this._treeBoxObject = this.tree.treeBoxObject;
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},
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get treeView()
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{
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if (this._treeView)
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return this._treeView;
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return this._treeView = this.tree.treeBoxObject.view;
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},
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get treeSelection()
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{
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if (this._treeSelection)
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return this._treeSelection;
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return this._treeSelection = this.tree.treeBoxObject.view.selection;
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},
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get treeBuilder()
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{
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if (this._treeBuilder)
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return this._treeBuilder;
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return this._treeBuilder = this.tree.builder.
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QueryInterface(Components.interfaces.nsIXULTreeBuilder);
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},
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SetTransferData : nsTreeController_SetTransferData,
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supportsCommand: function(command)
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{
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switch(command)
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{
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case "cmd_cut":
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case "cmd_copy":
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case "cmd_delete":
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case "cmd_selectAll":
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return true;
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default:
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return false;
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}
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},
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isCommandEnabled: function(command)
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{
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var haveCommand;
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switch (command)
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{
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// commands which do not require selection
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case "cmd_selectAll":
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var treeView = this.treeView;
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return (treeView.rowCount != treeView.selection.count);
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// these commands require selection
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case "cmd_cut":
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haveCommand = (this.cut != undefined);
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break;
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case "cmd_copy":
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haveCommand = (this.copy != undefined);
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break;
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case "cmd_delete":
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haveCommand = (this.doDelete != undefined);
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break;
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}
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// if we get here, then we have a command that requires selection
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var haveSelection = (this.treeSelection.count);
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return (haveCommand && haveSelection);
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},
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doCommand: function(command)
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{
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switch(command)
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{
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case "cmd_cut":
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return this.cut();
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case "cmd_copy":
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return this.copy();
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case "cmd_delete":
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return this.doDelete();
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case "cmd_selectAll":
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return this.selectAll();
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}
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return false;
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},
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copy: nsTreeController_copy,
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cut: nsTreeController_cut,
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doDelete: nsTreeController_delete,
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selectAll: nsTreeController_selectAll
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}
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