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