mirror of
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598 lines
22 KiB
JavaScript
598 lines
22 KiB
JavaScript
// -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*-
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* PrintUtils is a utility for front-end code to trigger common print
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* operations (printing, show print preview, show page settings).
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*
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* Unfortunately, likely due to inconsistencies in how different operating
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* systems do printing natively, our XPCOM-level printing interfaces
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* are a bit confusing and the method by which we do something basic
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* like printing a page is quite circuitous.
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*
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* To compound that, we need to support remote browsers, and that means
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* kicking off the print jobs in the content process. This means we send
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* messages back and forth to that process. browser-content.js contains
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* the object that listens and responds to the messages that PrintUtils
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* sends.
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*
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* This also means that <xul:browser>'s that hope to use PrintUtils must have
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* their type attribute set to either "content", "content-targetable", or
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* "content-primary".
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*
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* PrintUtils sends messages at different points in its implementation, but
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* their documentation is consolidated here for ease-of-access.
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*
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*
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* Messages sent:
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*
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* Printing:Print
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* This message is sent to kick off a print job for a particular content
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* window (which is passed along with the message). We also pass print
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* settings with this message - though bug 1088070 will have us gather
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* those settings from the content process instead.
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*
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* Printing:Preview:Enter
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* This message is sent to put content into print preview mode. We pass
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* the content window of the browser we're showing the preview of, and
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* the target of the message is the browser that we'll be showing the
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* preview in. We also pass print settings in this message, but
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* bug 1088070 will have us gather those settings from the content process
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* instead.
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*
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* Printing:Preview:Exit
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* This message is sent to take content out of print preview mode.
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*
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*
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* Messages Received
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*
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* Printing:Preview:Entered
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* This message is sent by the content process once it has completed
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* putting the content into print preview mode. We must wait for that to
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* to complete before switching the chrome UI to print preview mode,
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* otherwise we have layout issues.
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*
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* Printing:Preview:StateChange, Printing:Preview:ProgressChange
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* Due to a timing issue resulting in a main-process crash, we have to
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* manually open the progress dialog for print preview. The progress
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* dialog is opened here in PrintUtils, and then we listen for update
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* messages from the child. Bug 1088061 has been filed to investigate
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* other solutions.
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*
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*/
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var gPrintSettingsAreGlobal = false;
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var gSavePrintSettings = false;
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var gFocusedElement = null;
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var PrintUtils = {
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bailOut: function () {
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let pref = Components.classes["@mozilla.org/preferences-service;1"]
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.getService(Components.interfaces.nsIPrefBranch);
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let allow_for_testing = false;
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try {
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allow_for_testing = pref.getBoolPref("print.enable_e10s_testing");
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} catch(e) {
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// The pref wasn't set, so I guess we're not overriding.
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}
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if (this.usingRemoteTabs && !allow_for_testing) {
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alert("e10s printing is not implemented yet. Bug 927188.");
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return true;
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}
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return false;
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},
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/**
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* Shows the page setup dialog, and saves any settings changed in
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* that dialog if print.save_print_settings is set to true.
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*
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* @return true on success, false on failure
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*/
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showPageSetup: function () {
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if (this.bailOut()) {
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return;
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}
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try {
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var printSettings = this.getPrintSettings();
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var PRINTPROMPTSVC = Components.classes["@mozilla.org/embedcomp/printingprompt-service;1"]
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.getService(Components.interfaces.nsIPrintingPromptService);
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PRINTPROMPTSVC.showPageSetup(window, printSettings, null);
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if (gSavePrintSettings) {
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// Page Setup data is a "native" setting on the Mac
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var PSSVC = Components.classes["@mozilla.org/gfx/printsettings-service;1"]
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.getService(Components.interfaces.nsIPrintSettingsService);
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PSSVC.savePrintSettingsToPrefs(printSettings, true, printSettings.kInitSaveNativeData);
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}
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} catch (e) {
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dump("showPageSetup "+e+"\n");
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return false;
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}
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return true;
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},
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/**
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* Starts printing the contents of aWindow.
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*
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* @param aWindow
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* An nsIDOMWindow to initiate the printing of. If the chrome window
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* is not running with remote tabs, this defaults to window.content if
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* omitted. If running with remote tabs, the caller must pass in the
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* content window to be printed. This function throws if that invariant
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* is violated.
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* @param aBrowser (optional for non-remote browsers)
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* The remote <xul:browser> that contains aWindow. This argument is
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* not necessary if aWindow came from a non-remote browser, but is
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* strictly required otherwise. This function will throw if aWindow
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* comes from a remote browser and aBrowser is not provided. This
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* browser must have its type attribute set to "content",
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* "content-targetable", or "content-primary".
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*/
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print: function (aWindow, aBrowser)
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{
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if (this.bailOut()) {
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return;
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}
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if (!aWindow) {
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// If we're using remote browsers, chances are that window.content will
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// not be defined.
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if (this.usingRemoteTabs) {
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throw new Error("Windows running with remote tabs must explicitly pass " +
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"a content window to PrintUtils.print.");
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}
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// Otherwise, we should have access to window.content.
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aWindow = window.content;
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}
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if (Components.utils.isCrossProcessWrapper(aWindow)) {
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if (!aBrowser) {
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throw new Error("PrintUtils.print expects a remote browser passed as " +
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"an argument if the content window is a CPOW.");
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}
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} else {
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// For content windows coming from non-remote browsers, the browser can
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// be resolved as the chromeEventHandler.
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aBrowser = aWindow.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIWebNavigation)
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.QueryInterface(Components.interfaces.nsIDocShell)
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.chromeEventHandler;
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}
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if (!aBrowser) {
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throw new Error("PrintUtils.print could not resolve content window " +
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"to a browser.");
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}
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let printSettings = this.getPrintSettings();
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let mm = aBrowser.messageManager;
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mm.addMessageListener("Printing:Print:Done", function onPrintingDone(msg) {
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mm.removeMessageListener("Printing:Print:Done", onPrintingDone);
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let rv = msg.data.rv;
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let printSettings = msg.objects.printSettings;
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if (rv != Components.results.NS_OK &&
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rv != Components.results.NS_ERROR_ABORT) {
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Cu.reportError(`In Printing:Print:Done handler, got unexpected rv
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${rv}.`);
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}
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if (gPrintSettingsAreGlobal && gSavePrintSettings) {
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let PSSVC =
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Components.classes["@mozilla.org/gfx/printsettings-service;1"]
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.getService(Components.interfaces.nsIPrintSettingsService);
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PSSVC.savePrintSettingsToPrefs(printSettings, true,
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printSettings.kInitSaveAll);
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PSSVC.savePrintSettingsToPrefs(printSettings, false,
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printSettings.kInitSavePrinterName);
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}
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});
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mm.sendAsyncMessage("Printing:Print", null, {
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printSettings: printSettings,
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contentWindow: aWindow,
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});
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},
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/**
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* Initializes print preview.
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*
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* @param aListenerObj
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* An object that defines the following functions:
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*
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* getPrintPreviewBrowser:
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* Returns the <xul:browser> to display the print preview in. This
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* <xul:browser> must have its type attribute set to "content",
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* "content-targetable", or "content-primary".
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*
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* getSourceBrowser:
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* Returns the <xul:browser> that contains the document being
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* printed. This <xul:browser> must have its type attribute set to
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* "content", "content-targetable", or "content-primary".
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*
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* getNavToolbox:
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* Returns the primary toolbox for this window.
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*
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* onEnter:
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* Called upon entering print preview.
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*
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* onExit:
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* Called upon exiting print preview.
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*
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* These methods must be defined. printPreview can be called
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* with aListenerObj as null iff this window is already displaying
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* print preview (in which case, the previous aListenerObj passed
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* to it will be used).
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*/
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printPreview: function (aListenerObj)
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{
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if (this.bailOut()) {
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return;
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}
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// if we're already in PP mode, don't set the listener; chances
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// are it is null because someone is calling printPreview() to
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// get us to refresh the display.
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if (!this.inPrintPreview) {
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this._listener = aListenerObj;
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this._sourceBrowser = aListenerObj.getSourceBrowser();
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this._originalTitle = this._sourceBrowser.contentTitle;
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this._originalURL = this._sourceBrowser.currentURI.spec;
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} else {
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// collapse the browser here -- it will be shown in
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// enterPrintPreview; this forces a reflow which fixes display
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// issues in bug 267422.
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this._sourceBrowser = this._listener.getPrintPreviewBrowser();
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this._sourceBrowser.collapsed = true;
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}
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this._webProgressPP = {};
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let ppParams = {};
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let notifyOnOpen = {};
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let printSettings = this.getPrintSettings();
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// Here we get the PrintingPromptService so we can display the PP Progress from script
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// For the browser implemented via XUL with the PP toolbar we cannot let it be
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// automatically opened from the print engine because the XUL scrollbars in the PP window
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// will layout before the content window and a crash will occur.
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// Doing it all from script, means it lays out before hand and we can let printing do its own thing
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let PPROMPTSVC = Components.classes["@mozilla.org/embedcomp/printingprompt-service;1"]
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.getService(Components.interfaces.nsIPrintingPromptService);
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// just in case we are already printing,
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// an error code could be returned if the Progress Dialog is already displayed
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try {
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PPROMPTSVC.showProgress(window, null, printSettings, this._obsPP, false,
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this._webProgressPP, ppParams, notifyOnOpen);
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if (ppParams.value) {
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ppParams.value.docTitle = this._originalTitle;
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ppParams.value.docURL = this._originalURL;
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}
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// this tells us whether we should continue on with PP or
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// wait for the callback via the observer
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if (!notifyOnOpen.value.valueOf() || this._webProgressPP.value == null) {
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this.enterPrintPreview();
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}
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} catch (e) {
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this.enterPrintPreview();
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}
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},
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/**
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* Returns the nsIWebBrowserPrint associated with some content window.
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* This method is being kept here for compatibility reasons, but should not
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* be called by code hoping to support e10s / remote browsers.
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*
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* @param aWindow
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* The window from which to get the nsIWebBrowserPrint from.
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* @return nsIWebBrowserPrint
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*/
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getWebBrowserPrint: function (aWindow)
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{
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let Deprecated = Components.utils.import("resource://gre/modules/Deprecated.jsm", {}).Deprecated;
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let text = "getWebBrowserPrint is now deprecated, and fully unsupported for " +
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"multi-process browsers. Please use a frame script to get " +
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"access to nsIWebBrowserPrint from content.";
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let url = "https://developer.mozilla.org/en-US/docs/Printing_from_a_XUL_App";
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Deprecated.warning(text, url);
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if (this.usingRemoteTabs) {
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return {};
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}
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var contentWindow = aWindow || window.content;
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return contentWindow.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIWebBrowserPrint);
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},
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/**
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* Returns the nsIWebBrowserPrint from the print preview browser's docShell.
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* This method is being kept here for compatibility reasons, but should not
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* be called by code hoping to support e10s / remote browsers.
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*
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* @return nsIWebBrowserPrint
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*/
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getPrintPreview: function() {
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let Deprecated = Components.utils.import("resource://gre/modules/Deprecated.jsm", {}).Deprecated;
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let text = "getPrintPreview is now deprecated, and fully unsupported for " +
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"multi-process browsers. Please use a frame script to get " +
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"access to nsIWebBrowserPrint from content.";
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let url = "https://developer.mozilla.org/en-US/docs/Printing_from_a_XUL_App";
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Deprecated.warning(text, url);
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if (this.usingRemoteTabs) {
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return {};
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}
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return this._listener.getPrintPreviewBrowser().docShell.printPreview;
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},
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get inPrintPreview() {
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return document.getElementById("print-preview-toolbar") != null;
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},
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////////////////////////////////////////////////////
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// "private" methods and members. Don't use them. //
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///////////////////////////////////////////////////
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_listener: null,
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_closeHandlerPP: null,
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_webProgressPP: null,
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_sourceBrowser: null,
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_originalTitle: "",
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_originalURL: "",
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get usingRemoteTabs() {
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// We memoize this, since it's highly unlikely to change over the lifetime
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// of the window.
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let usingRemoteTabs =
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window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIWebNavigation)
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.QueryInterface(Components.interfaces.nsILoadContext)
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.useRemoteTabs;
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delete this.usingRemoteTabs;
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return this.usingRemoteTabs = usingRemoteTabs;
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},
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receiveMessage(aMessage) {
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if (!this._webProgressPP.value) {
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// We somehow didn't get a nsIWebProgressListener to be updated...
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// I guess there's nothing to do.
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return;
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}
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let listener = this._webProgressPP.value;
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let mm = aMessage.target.messageManager;
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let data = aMessage.data;
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switch (aMessage.name) {
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case "Printing:Preview:ProgressChange": {
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return listener.onProgressChange(null, null,
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data.curSelfProgress,
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data.maxSelfProgress,
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data.curTotalProgress,
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data.maxTotalProgress);
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break;
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}
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case "Printing:Preview:StateChange": {
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if (data.stateFlags & Components.interfaces.nsIWebProgressListener.STATE_STOP) {
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// Strangely, the printing engine sends 2 STATE_STOP messages when
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// print preview is finishing. One has the STATE_IS_DOCUMENT flag,
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// the other has the STATE_IS_NETWORK flag. However, the webProgressPP
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// listener stops listening once the first STATE_STOP is sent.
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// Any subsequent messages result in NS_ERROR_FAILURE errors getting
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// thrown. This should all get torn out once bug 1088061 is fixed.
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mm.removeMessageListener("Printing:Preview:StateChange", this);
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mm.removeMessageListener("Printing:Preview:ProgressChange", this);
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}
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return listener.onStateChange(null, null,
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data.stateFlags,
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data.status);
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break;
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}
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}
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},
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setPrinterDefaultsForSelectedPrinter: function (aPSSVC, aPrintSettings)
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{
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if (!aPrintSettings.printerName)
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aPrintSettings.printerName = aPSSVC.defaultPrinterName;
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// First get any defaults from the printer
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aPSSVC.initPrintSettingsFromPrinter(aPrintSettings.printerName, aPrintSettings);
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// now augment them with any values from last time
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aPSSVC.initPrintSettingsFromPrefs(aPrintSettings, true, aPrintSettings.kInitSaveAll);
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},
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getPrintSettings: function ()
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{
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var pref = Components.classes["@mozilla.org/preferences-service;1"]
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.getService(Components.interfaces.nsIPrefBranch);
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if (pref) {
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gPrintSettingsAreGlobal = pref.getBoolPref("print.use_global_printsettings", false);
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gSavePrintSettings = pref.getBoolPref("print.save_print_settings", false);
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}
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var printSettings;
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try {
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var PSSVC = Components.classes["@mozilla.org/gfx/printsettings-service;1"]
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.getService(Components.interfaces.nsIPrintSettingsService);
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if (gPrintSettingsAreGlobal) {
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printSettings = PSSVC.globalPrintSettings;
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this.setPrinterDefaultsForSelectedPrinter(PSSVC, printSettings);
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} else {
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printSettings = PSSVC.newPrintSettings;
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}
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} catch (e) {
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dump("getPrintSettings: "+e+"\n");
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}
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return printSettings;
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},
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// This observer is called once the progress dialog has been "opened"
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_obsPP:
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{
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observe: function(aSubject, aTopic, aData)
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{
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// delay the print preview to show the content of the progress dialog
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setTimeout(function () { PrintUtils.enterPrintPreview(); }, 0);
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},
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QueryInterface : function(iid)
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{
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if (iid.equals(Components.interfaces.nsIObserver) ||
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iid.equals(Components.interfaces.nsISupportsWeakReference) ||
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iid.equals(Components.interfaces.nsISupports))
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return this;
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throw Components.results.NS_NOINTERFACE;
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}
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},
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enterPrintPreview: function ()
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{
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// Send a message to the print preview browser to initialize
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// print preview. If we happen to have gotten a print preview
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// progress listener from nsIPrintingPromptService.showProgress
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// in printPreview, we add listeners to feed that progress
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// listener.
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let ppBrowser = this._listener.getPrintPreviewBrowser();
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let mm = ppBrowser.messageManager;
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let printSettings = this.getPrintSettings();
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mm.sendAsyncMessage("Printing:Preview:Enter", null, {
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printSettings: printSettings,
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contentWindow: this._sourceBrowser.contentWindowAsCPOW,
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});
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if (this._webProgressPP.value) {
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mm.addMessageListener("Printing:Preview:StateChange", this);
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mm.addMessageListener("Printing:Preview:ProgressChange", this);
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}
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let onEntered = (message) => {
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mm.removeMessageListener("Printing:PrintPreview:Entered", onEntered);
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if (message.data.failed) {
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// Something went wrong while putting the document into print preview
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// mode. Bail out.
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this._listener.onEnter();
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this._listener.onExit();
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return;
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}
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// Stash the focused element so that we can return to it after exiting
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// print preview.
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gFocusedElement = document.commandDispatcher.focusedElement;
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let printPreviewTB = document.getElementById("print-preview-toolbar");
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if (printPreviewTB) {
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printPreviewTB.updateToolbar();
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ppBrowser.collapsed = false;
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ppBrowser.focus();
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return;
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}
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// Set the original window as an active window so any mozPrintCallbacks can
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// run without delayed setTimeouts.
|
|
this._sourceBrowser.docShellIsActive = true;
|
|
|
|
// show the toolbar after we go into print preview mode so
|
|
// that we can initialize the toolbar with total num pages
|
|
const XUL_NS =
|
|
"http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
|
|
printPreviewTB = document.createElementNS(XUL_NS, "toolbar");
|
|
printPreviewTB.setAttribute("printpreview", true);
|
|
printPreviewTB.id = "print-preview-toolbar";
|
|
|
|
let navToolbox = this._listener.getNavToolbox();
|
|
navToolbox.parentNode.insertBefore(printPreviewTB, navToolbox);
|
|
printPreviewTB.initialize(ppBrowser);
|
|
|
|
// copy the window close handler
|
|
if (document.documentElement.hasAttribute("onclose"))
|
|
this._closeHandlerPP = document.documentElement.getAttribute("onclose");
|
|
else
|
|
this._closeHandlerPP = null;
|
|
document.documentElement.setAttribute("onclose", "PrintUtils.exitPrintPreview(); return false;");
|
|
|
|
// disable chrome shortcuts...
|
|
window.addEventListener("keydown", this.onKeyDownPP, true);
|
|
window.addEventListener("keypress", this.onKeyPressPP, true);
|
|
|
|
ppBrowser.collapsed = false;
|
|
ppBrowser.focus();
|
|
// on Enter PP Call back
|
|
this._listener.onEnter();
|
|
};
|
|
|
|
mm.addMessageListener("Printing:Preview:Entered", onEntered);
|
|
},
|
|
|
|
exitPrintPreview: function ()
|
|
{
|
|
let ppBrowser = this._listener.getPrintPreviewBrowser();
|
|
let browserMM = ppBrowser.messageManager;
|
|
browserMM.sendAsyncMessage("Printing:Preview:Exit");
|
|
window.removeEventListener("keydown", this.onKeyDownPP, true);
|
|
window.removeEventListener("keypress", this.onKeyPressPP, true);
|
|
|
|
// restore the old close handler
|
|
document.documentElement.setAttribute("onclose", this._closeHandlerPP);
|
|
this._closeHandlerPP = null;
|
|
|
|
// remove the print preview toolbar
|
|
let printPreviewTB = document.getElementById("print-preview-toolbar");
|
|
this._listener.getNavToolbox().parentNode.removeChild(printPreviewTB);
|
|
|
|
let fm = Components.classes["@mozilla.org/focus-manager;1"]
|
|
.getService(Components.interfaces.nsIFocusManager);
|
|
if (gFocusedElement)
|
|
fm.setFocus(gFocusedElement, fm.FLAG_NOSCROLL);
|
|
else
|
|
this._sourceBrowser.focus();
|
|
gFocusedElement = null;
|
|
|
|
this._listener.onExit();
|
|
},
|
|
|
|
onKeyDownPP: function (aEvent)
|
|
{
|
|
// Esc exits the PP
|
|
if (aEvent.keyCode == aEvent.DOM_VK_ESCAPE) {
|
|
PrintUtils.exitPrintPreview();
|
|
}
|
|
},
|
|
|
|
onKeyPressPP: function (aEvent)
|
|
{
|
|
var closeKey;
|
|
try {
|
|
closeKey = document.getElementById("key_close")
|
|
.getAttribute("key");
|
|
closeKey = aEvent["DOM_VK_"+closeKey];
|
|
} catch (e) {}
|
|
var isModif = aEvent.ctrlKey || aEvent.metaKey;
|
|
// Ctrl-W exits the PP
|
|
if (isModif &&
|
|
(aEvent.charCode == closeKey || aEvent.charCode == closeKey + 32)) {
|
|
PrintUtils.exitPrintPreview();
|
|
}
|
|
else if (isModif) {
|
|
var printPreviewTB = document.getElementById("print-preview-toolbar");
|
|
var printKey = document.getElementById("printKb").getAttribute("key").toUpperCase();
|
|
var pressedKey = String.fromCharCode(aEvent.charCode).toUpperCase();
|
|
if (printKey == pressedKey) {
|
|
printPreviewTB.print();
|
|
}
|
|
}
|
|
// cancel shortkeys
|
|
if (isModif) {
|
|
aEvent.preventDefault();
|
|
aEvent.stopPropagation();
|
|
}
|
|
}
|
|
}
|