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- /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * 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 Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- * Blake Ross <blakeross@telocity.com> (Original Author)
- */
-
- // 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-wstring;1";
- const rdfc_contractid = "@mozilla.org/rdf/container;1";
-
- const nsISupportsWString = Components.interfaces.nsISupportsWString;
- const nsIClipboard = Components.interfaces.nsIClipboard;
- const nsITransferable = Components.interfaces.nsITransferable;
- const nsIRDFLiteral = Components.interfaces.nsIRDFLiteral;
- const nsIRDFContainer = Components.interfaces.nsIRDFContainer;
-
- var gClipboard;
- var gOutliner;
- var gOutlinerBody;
- var gRDFC;
- var gRDF;
-
- function isContainer(outliner, index)
- {
- return outliner.outlinerBoxObject.view.isContainer(index);
- }
-
- function nsOutlinerController_SetTransferData(transferable, flavor, text)
- {
- if (!text)
- return;
- var textData = Components.classes[supportswstring_contractid].createInstance(nsISupportsWString);
- textData.data = text;
-
- transferable.addDataFlavor(flavor);
- transferable.setTransferData(flavor, textData, text.length*2);
- }
-
- function nsOutlinerController_copy()
- {
- var rangeCount = this.getOutlinerSelection().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 = 0; i < rangeCount; ++i) {
- this.getOutlinerSelection().getRangeAt(i, min, max);
- for (var k = min.value; k <= max.value; ++k) {
- // If one of the selected items is
- // a container, ignore it.
- if (isContainer(this.getOutliner(), k))
- continue;
- var pageUrl = this.getOutlinerView().getCellText(k, "URL");
- var pageName = this.getOutlinerView().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 nsOutlinerController_cut()
- {
- if (this.copy()) {
- this.doDelete();
- return true; // copy succeeded, don't care if delete failed
- }
- return false; // copy failed, so did cut
- }
-
- function nsOutlinerController_selectAll()
- {
- this.getOutlinerSelection().selectAll();
- }
-
- function nsOutlinerController_delete()
- {
- var rangeCount = this.getOutlinerSelection().getRangeCount();
- if (rangeCount < 1)
- return false;
-
- if (!gRDFC)
- gRDFC = Components.classes[rdfc_contractid].getService(nsIRDFContainer);
-
- var datasource = this.getOutlinerBody().database;
- var min = new Object();
- var max = new Object();
- var dirty = false;
-
- for (var i = 0; i < rangeCount; ++i) {
- this.getOutlinerSelection().getRangeAt(i, min, max);
- for (var k = max.value; k >= min.value; --k) {
- var url = this.getOutlinerView().getCellText(k, "URL");
- if (!url)
- continue;
-
- if (!gRDF)
- gRDF = Components.classes[rdf_contractid].getService(Components.interfaces.nsIRDFService);
-
- var IDRes = gRDF.GetResource(url);
- if (!IDRes)
- continue;
-
- var root = this.getOutlinerBody().getAttribute('ref');
- var parentIDRes = gRDF.GetResource(root);
- if (!parentIDRes)
- continue;
-
- // XXX - This should not be necessary
- // Why doesn't the unassertion fan out to all of the datasources in
- // the nsIRDFCompositeDataSource so they can handle it?
- var dsEnum = datasource.GetDataSources();
- while (dsEnum.hasMoreElements()) {
- var ds = dsEnum.getNext().QueryInterface(Components.interfaces.nsIRDFDataSource);
-
- try {
- // try a container-based approach
- gRDFC.Init(ds, parentIDRes);
- gRDFC.RemoveElement(IDRes, true);
- } catch (ex) {
- // 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 (dirty) {
- try {
- var remote = datasource.QueryInterface(Components.interfaces.nsIRDFRemoteDataSource);
- remote.Flush();
- } catch (ex) {
- }
- }
- return true;
- }
-
- function nsOutlinerController(outliner, outlinerBody)
- {
- this.outlinerId = outliner.id;
- this.outlinerBodyId = outlinerBody.id;
- outliner.controllers.appendController(this);
- }
-
- nsOutlinerController.prototype =
- {
- // store the outliner's ID, rather than the outliner,
- // to avoid holding a strong ref
- outlinerId: null,
- outlinerBodyId: null,
- getOutliner : function()
- {
- if (!gOutliner)
- gOutliner = document.getElementById(this.outlinerId);
- return gOutliner;
- },
- getOutlinerBoxObject : function()
- {
- return this.getOutliner().outlinerBoxObject;
- },
- getOutlinerView : function()
- {
- return this.getOutliner().outlinerBoxObject.view;
- },
- getOutlinerSelection : function()
- {
- return this.getOutliner().outlinerBoxObject.view.selection;
- },
- getOutlinerBody : function()
- {
- if (!gOutlinerBody)
- gOutlinerBody = document.getElementById(this.outlinerBodyId);
- return gOutlinerBody;
- },
- SetTransferData : nsOutlinerController_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 outlinerView = this.getOutlinerView();
- return (outlinerView.rowCount != outlinerView.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.getOutlinerSelection().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: nsOutlinerController_copy,
- cut: nsOutlinerController_cut,
- doDelete: nsOutlinerController_delete,
- selectAll: nsOutlinerController_selectAll
- }
-
-