summaryrefslogtreecommitdiffstats
path: root/application/palemoon/components/sessionstore/content/aboutSessionRestore.js
blob: 2b6f9eaeb58b03f51f792cf78800c9d7ea3976b7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
/* 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/. */

var Cc = Components.classes;
var Ci = Components.interfaces;
var Cu = Components.utils;

var gStateObject;
var gTreeData;

// Page initialization

window.onload = function() {
  // the crashed session state is kept inside a textbox so that SessionStore picks it up
  // (for when the tab is closed or the session crashes right again)
  var sessionData = document.getElementById("sessionData");
  if (!sessionData.value) {
    document.getElementById("errorTryAgain").disabled = true;
    return;
  }

  // remove unneeded braces (added for compatibility with Firefox 2.0 and 3.0)
  if (sessionData.value.charAt(0) == '(')
    sessionData.value = sessionData.value.slice(1, -1);
  try {
    gStateObject = JSON.parse(sessionData.value);
  }
  catch (exJSON) {
    var s = new Cu.Sandbox("about:blank", {sandboxName: 'aboutSessionRestore'});
    gStateObject = Cu.evalInSandbox("(" + sessionData.value + ")", s);
    // If we couldn't parse the string with JSON.parse originally, make sure
    // that the value in the textbox will be parsable.
    sessionData.value = JSON.stringify(gStateObject);
  }

  // make sure the data is tracked to be restored in case of a subsequent crash
  var event = document.createEvent("UIEvents");
  event.initUIEvent("input", true, true, window, 0);
  sessionData.dispatchEvent(event);

  initTreeView();

  document.getElementById("errorTryAgain").focus();
};

function initTreeView() {
  var tabList = document.getElementById("tabList");
  var winLabel = tabList.getAttribute("_window_label");

  gTreeData = [];
  gStateObject.windows.forEach(function(aWinData, aIx) {
    var winState = {
      label: winLabel.replace("%S", (aIx + 1)),
      open: true,
      checked: true,
      ix: aIx
    };
    winState.tabs = aWinData.tabs.map(function(aTabData) {
      var entry = aTabData.entries[aTabData.index - 1] || { url: "about:blank" };
      var iconURL = aTabData.attributes && aTabData.attributes.image || null;
      // don't initiate a connection just to fetch a favicon (see bug 462863)
      if (/^https?:/.test(iconURL))
        iconURL = "moz-anno:favicon:" + iconURL;
      return {
        label: entry.title || entry.url,
        checked: true,
        src: iconURL,
        parent: winState
      };
    });
    gTreeData.push(winState);
    for (let tab of winState.tabs)
      gTreeData.push(tab);
  }, this);

  tabList.view = treeView;
  tabList.view.selection.select(0);
}

// User actions

function restoreSession() {
  document.getElementById("errorTryAgain").disabled = true;

  // remove all unselected tabs from the state before restoring it
  var ix = gStateObject.windows.length - 1;
  for (var t = gTreeData.length - 1; t >= 0; t--) {
    if (treeView.isContainer(t)) {
      if (gTreeData[t].checked === 0)
        // this window will be restored partially
        gStateObject.windows[ix].tabs =
          gStateObject.windows[ix].tabs.filter(function(aTabData, aIx)
                                                 gTreeData[t].tabs[aIx].checked);
      else if (!gTreeData[t].checked)
        // this window won't be restored at all
        gStateObject.windows.splice(ix, 1);
      ix--;
    }
  }
  var stateString = JSON.stringify(gStateObject);

  var ss = Cc["@mozilla.org/browser/sessionstore;1"].getService(Ci.nsISessionStore);
  var top = getBrowserWindow();

  // if there's only this page open, reuse the window for restoring the session
  if (top.gBrowser.tabs.length == 1) {
    ss.setWindowState(top, stateString, true);
    return;
  }

  // restore the session into a new window and close the current tab
  var newWindow = top.openDialog(top.location, "_blank", "chrome,dialog=no,all");
  newWindow.addEventListener("load", function() {
    newWindow.removeEventListener("load", arguments.callee, true);
    ss.setWindowState(newWindow, stateString, true);

    var tabbrowser = top.gBrowser;
    var tabIndex = tabbrowser.getBrowserIndexForDocument(document);
    tabbrowser.removeTab(tabbrowser.tabs[tabIndex]);
  }, true);
}

function startNewSession() {
  var prefBranch = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
  if (prefBranch.getIntPref("browser.startup.page") == 0)
    getBrowserWindow().gBrowser.loadURI("about:logopage");
  else
    getBrowserWindow().BrowserHome();
}

function onListClick(aEvent) {
  // don't react to right-clicks
  if (aEvent.button == 2)
    return;

  if (!treeView.treeBox) {
    return;
  }
  var cell = treeView.treeBox.getCellAt(aEvent.clientX, aEvent.clientY);
  if (cell.col) {
    // Restore this specific tab in the same window for middle/double/accel clicking
    // on a tab's title.
#ifdef XP_MACOSX
    let accelKey = aEvent.metaKey;
#else
    let accelKey = aEvent.ctrlKey;
#endif
    if ((aEvent.button == 1 || aEvent.button == 0 && aEvent.detail == 2 || accelKey) &&
        cell.col.id == "title" &&
        !treeView.isContainer(cell.row)) {
      restoreSingleTab(cell.row, aEvent.shiftKey);
      aEvent.stopPropagation();
    }
    else if (cell.col.id == "restore")
      toggleRowChecked(cell.row);
  }
}

function onListKeyDown(aEvent) {
  switch (aEvent.keyCode)
  {
  case KeyEvent.DOM_VK_SPACE:
    toggleRowChecked(document.getElementById("tabList").currentIndex);
    break;
  case KeyEvent.DOM_VK_RETURN:
    var ix = document.getElementById("tabList").currentIndex;
    if (aEvent.ctrlKey && !treeView.isContainer(ix))
      restoreSingleTab(ix, aEvent.shiftKey);
    break;
  case KeyEvent.DOM_VK_UP:
  case KeyEvent.DOM_VK_DOWN:
  case KeyEvent.DOM_VK_PAGE_UP:
  case KeyEvent.DOM_VK_PAGE_DOWN:
  case KeyEvent.DOM_VK_HOME:
  case KeyEvent.DOM_VK_END:
    aEvent.preventDefault(); // else the page scrolls unwantedly
    break;
  }
}

// Helper functions

function getBrowserWindow() {
  return window.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebNavigation)
               .QueryInterface(Ci.nsIDocShellTreeItem).rootTreeItem
               .QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindow);
}

function toggleRowChecked(aIx) {
  var item = gTreeData[aIx];
  item.checked = !item.checked;
  treeView.treeBox.invalidateRow(aIx);

  function isChecked(aItem) aItem.checked;

  if (treeView.isContainer(aIx)) {
    // (un)check all tabs of this window as well
    for (let tab of item.tabs) {
      tab.checked = item.checked;
      treeView.treeBox.invalidateRow(gTreeData.indexOf(tab));
    }
  }
  else {
    // update the window's checkmark as well (0 means "partially checked")
    item.parent.checked = item.parent.tabs.every(isChecked) ? true :
                          item.parent.tabs.some(isChecked) ? 0 : false;
    treeView.treeBox.invalidateRow(gTreeData.indexOf(item.parent));
  }

  document.getElementById("errorTryAgain").disabled = !gTreeData.some(isChecked);
}

function restoreSingleTab(aIx, aShifted) {
  var tabbrowser = getBrowserWindow().gBrowser;
  var newTab = tabbrowser.addTab();
  var item = gTreeData[aIx];

  var ss = Cc["@mozilla.org/browser/sessionstore;1"].getService(Ci.nsISessionStore);
  var tabState = gStateObject.windows[item.parent.ix]
                             .tabs[aIx - gTreeData.indexOf(item.parent) - 1];
  // ensure tab would be visible on the tabstrip.
  tabState.hidden = false;
  ss.setTabState(newTab, JSON.stringify(tabState));

  // respect the preference as to whether to select the tab (the Shift key inverses)
  var prefBranch = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
  if (prefBranch.getBoolPref("browser.tabs.loadInBackground") != !aShifted)
    tabbrowser.selectedTab = newTab;
}

// Tree controller

var treeView = {
  treeBox: null,
  selection: null,

  get rowCount()                     { return gTreeData.length; },
  setTree: function(treeBox)         { this.treeBox = treeBox; },
  getCellText: function(idx, column) { return gTreeData[idx].label; },
  isContainer: function(idx)         { return "open" in gTreeData[idx]; },
  getCellValue: function(idx, column){ return gTreeData[idx].checked; },
  isContainerOpen: function(idx)     { return gTreeData[idx].open; },
  isContainerEmpty: function(idx)    { return false; },
  isSeparator: function(idx)         { return false; },
  isSorted: function()               { return false; },
  isEditable: function(idx, column)  { return false; },
  canDrop: function(idx, orientation, dt) { return false; },
  getLevel: function(idx)            { return this.isContainer(idx) ? 0 : 1; },

  getParentIndex: function(idx) {
    if (!this.isContainer(idx))
      for (var t = idx - 1; t >= 0 ; t--)
        if (this.isContainer(t))
          return t;
    return -1;
  },

  hasNextSibling: function(idx, after) {
    var thisLevel = this.getLevel(idx);
    for (var t = after + 1; t < gTreeData.length; t++)
      if (this.getLevel(t) <= thisLevel)
        return this.getLevel(t) == thisLevel;
    return false;
  },

  toggleOpenState: function(idx) {
    if (!this.isContainer(idx))
      return;
    var item = gTreeData[idx];
    if (item.open) {
      // remove this window's tab rows from the view
      var thisLevel = this.getLevel(idx);
      for (var t = idx + 1; t < gTreeData.length && this.getLevel(t) > thisLevel; t++);
      var deletecount = t - idx - 1;
      gTreeData.splice(idx + 1, deletecount);
      this.treeBox.rowCountChanged(idx + 1, -deletecount);
    }
    else {
      // add this window's tab rows to the view
      var toinsert = gTreeData[idx].tabs;
      for (var i = 0; i < toinsert.length; i++)
        gTreeData.splice(idx + i + 1, 0, toinsert[i]);
      this.treeBox.rowCountChanged(idx + 1, toinsert.length);
    }
    item.open = !item.open;
    this.treeBox.invalidateRow(idx);
  },

  getCellProperties: function(idx, column) {
    if (column.id == "restore" && this.isContainer(idx) && gTreeData[idx].checked === 0)
      return "partial";
    if (column.id == "title")
      return this.getImageSrc(idx, column) ? "icon" : "noicon";

    return "";
  },

  getRowProperties: function(idx) {
    var winState = gTreeData[idx].parent || gTreeData[idx];
    if (winState.ix % 2 != 0)
      return "alternate";

    return "";
  },

  getImageSrc: function(idx, column) {
    if (column.id == "title")
      return gTreeData[idx].src || null;
    return null;
  },

  getProgressMode : function(idx, column) { },
  cycleHeader: function(column) { },
  cycleCell: function(idx, column) { },
  selectionChanged: function() { },
  performAction: function(action) { },
  performActionOnCell: function(action, index, column) { },
  getColumnProperties: function(column) { return ""; }
};