fune/toolkit/components/printing/content/printPreviewProgress.js

// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// dialog is just an array we'll use to store various properties from the dialog document...
var dialog;

// the printProgress is a nsIPrintProgress object
var printProgress = null;

// random global variables...
var targetFile;

var docTitle = "";
var docURL = "";
var progressParams = null;

function ellipseString(aStr, doFront) {
  if (!aStr) {
    return "";
  }

  if (
    aStr.length > 3 &&
    (aStr.substr(0, 3) == "..." || aStr.substr(aStr.length - 4, 3) == "...")
  ) {
    return aStr;
  }

  var fixedLen = 64;
  if (aStr.length <= fixedLen) {
    return aStr;
  }

  if (doFront) {
    return "..." + aStr.substr(aStr.length - fixedLen, fixedLen);
  }

  return aStr.substr(0, fixedLen) + "...";
}

// all progress notifications are done through the nsIWebProgressListener implementation...
var progressListener = {
  onStateChange(aWebProgress, aRequest, aStateFlags, aStatus) {
    if (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP) {
      window.close();
    }
  },

  onProgressChange(
    aWebProgress,
    aRequest,
    aCurSelfProgress,
    aMaxSelfProgress,
    aCurTotalProgress,
    aMaxTotalProgress
  ) {
    if (!progressParams) {
      return;
    }
    var docTitleStr = ellipseString(progressParams.docTitle, false);
    if (docTitleStr != docTitle) {
      docTitle = docTitleStr;
      dialog.title.value = docTitle;
    }
    var docURLStr = ellipseString(progressParams.docURL, true);
    if (docURLStr != docURL && dialog.title != null) {
      docURL = docURLStr;
      if (docTitle == "") {
        dialog.title.value = docURLStr;
      }
    }
  },

  onLocationChange(aWebProgress, aRequest, aLocation, aFlags) {},
  onSecurityChange(aWebProgress, aRequest, state) {},
  onContentBlockingEvent(aWebProgress, aRequest, event) {},

  onStatusChange(aWebProgress, aRequest, aStatus, aMessage) {
    if (aMessage) {
      dialog.title.setAttribute("value", aMessage);
    }
  },

  QueryInterface: ChromeUtils.generateQI([
    "nsIWebProgressListener",
    "nsISupportsWeakReference",
  ]),
};

function onLoad() {
  // Set global variables.
  printProgress = window.arguments[0];
  if (window.arguments[1]) {
    progressParams = window.arguments[1].QueryInterface(
      Ci.nsIPrintProgressParams
    );
    if (progressParams) {
      docTitle = ellipseString(progressParams.docTitle, false);
      docURL = ellipseString(progressParams.docURL, true);
    }
  }

  if (!printProgress) {
    dump("Invalid argument to printPreviewProgress.xhtml\n");
    window.close();
    return;
  }

  dialog = {};
  dialog.strings = [];
  dialog.title = document.getElementById("dialog.title");
  dialog.titleLabel = document.getElementById("dialog.titleLabel");

  dialog.title.value = docTitle;

  // set our web progress listener on the helper app launcher
  printProgress.registerListener(progressListener);

  // We need to delay the set title else dom will overwrite it
  window.setTimeout(doneIniting, 100);
}

function onUnload() {
  if (!printProgress) {
    return;
  }
  try {
    printProgress.unregisterListener(progressListener);
    printProgress = null;
  } catch (e) {}
}

// If the user presses cancel, tell the app launcher and close the dialog...
function onCancel() {
  // Cancel app launcher.
  try {
    printProgress.processCanceledByUser = true;
  } catch (e) {
    return true;
  }

  // don't Close up dialog by returning false, the backend will close the dialog when everything will be aborted.
  return false;
}

function doneIniting() {
  // called by function timeout in onLoad
  printProgress.doneIniting();
}