Add m-esr52 at 52.6.0

1 files changed, 307 insertions, 0 deletions

diff --git a/browser/base/content/browser-tabsintitlebar.js b/browser/base/content/browser-tabsintitlebar.js
new file mode 100644
index 000000000..5c0d94514
--- /dev/null
+++ b/browser/base/content/browser-tabsintitlebar.js
@@ -0,0 +1,307 @@
+/* -*- 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/. */
+
+// Note: the file browser-tabsintitlebar-stub.js is used instead of
+// this one on platforms which don't have CAN_DRAW_IN_TITLEBAR defined.
+
+var TabsInTitlebar = {
+  init: function () {
+    if (this._initialized) {
+      return;
+    }
+    this._readPref();
+    Services.prefs.addObserver(this._prefName, this, false);
+
+    // We need to update the appearance of the titlebar when the menu changes
+    // from the active to the inactive state. We can't, however, rely on
+    // DOMMenuBarInactive, because the menu fires this event and then removes
+    // the inactive attribute after an event-loop spin.
+    //
+    // Because updating the appearance involves sampling the heights and margins
+    // of various elements, it's important that the layout be more or less
+    // settled before updating the titlebar. So instead of listening to
+    // DOMMenuBarActive and DOMMenuBarInactive, we use a MutationObserver to
+    // watch the "invalid" attribute directly.
+    let menu = document.getElementById("toolbar-menubar");
+    this._menuObserver = new MutationObserver(this._onMenuMutate);
+    this._menuObserver.observe(menu, {attributes: true});
+
+    this.onAreaReset = function(aArea) {
+      if (aArea == CustomizableUI.AREA_TABSTRIP || aArea == CustomizableUI.AREA_MENUBAR)
+        this._update(true);
+    };
+    this.onWidgetAdded = this.onWidgetRemoved = function(aWidgetId, aArea) {
+      if (aArea == CustomizableUI.AREA_TABSTRIP || aArea == CustomizableUI.AREA_MENUBAR)
+        this._update(true);
+    };
+    CustomizableUI.addListener(this);
+
+    addEventListener("resolutionchange", this, false);
+
+    this._initialized = true;
+    if (this._updateOnInit) {
+      // We don't need to call this with 'true', even if original calls
+      // (before init()) did, because this will be the first call and so
+      // we will update anyway.
+      this._update();
+    }
+  },
+
+  allowedBy: function (condition, allow) {
+    if (allow) {
+      if (condition in this._disallowed) {
+        delete this._disallowed[condition];
+        this._update(true);
+      }
+    } else if (!(condition in this._disallowed)) {
+      this._disallowed[condition] = null;
+      this._update(true);
+    }
+  },
+
+  updateAppearance: function updateAppearance(aForce) {
+    this._update(aForce);
+  },
+
+  get enabled() {
+    return document.documentElement.getAttribute("tabsintitlebar") == "true";
+  },
+
+  observe: function (subject, topic, data) {
+    if (topic == "nsPref:changed")
+      this._readPref();
+  },
+
+  handleEvent: function (aEvent) {
+    if (aEvent.type == "resolutionchange" && aEvent.target == window) {
+      this._update(true);
+    }
+  },
+
+  _onMenuMutate: function (aMutations) {
+    for (let mutation of aMutations) {
+      if (mutation.attributeName == "inactive" ||
+          mutation.attributeName == "autohide") {
+        TabsInTitlebar._update(true);
+        return;
+      }
+    }
+  },
+
+  _initialized: false,
+  _updateOnInit: false,
+  _disallowed: {},
+  _prefName: "browser.tabs.drawInTitlebar",
+  _lastSizeMode: null,
+
+  _readPref: function () {
+    this.allowedBy("pref",
+                   Services.prefs.getBoolPref(this._prefName));
+  },
+
+  _update: function (aForce=false) {
+    let $ = id => document.getElementById(id);
+    let rect = ele => ele.getBoundingClientRect();
+    let verticalMargins = cstyle => parseFloat(cstyle.marginBottom) + parseFloat(cstyle.marginTop);
+
+    if (window.fullScreen)
+      return;
+
+    // In some edgecases it is possible for this to fire before we've initialized.
+    // Don't run now, but don't forget to run it when we do initialize.
+    if (!this._initialized) {
+      this._updateOnInit = true;
+      return;
+    }
+
+    if (!aForce) {
+      // _update is called on resize events, because the window is not ready
+      // after sizemode events. However, we only care about the event when the
+      // sizemode is different from the last time we updated the appearance of
+      // the tabs in the titlebar.
+      let sizemode = document.documentElement.getAttribute("sizemode");
+      if (this._lastSizeMode == sizemode) {
+        return;
+      }
+      let oldSizeMode = this._lastSizeMode;
+      this._lastSizeMode = sizemode;
+      // Don't update right now if we are leaving fullscreen, since the UI is
+      // still changing in the consequent "fullscreen" event. Code there will
+      // call this function again when everything is ready.
+      // See browser-fullScreen.js: FullScreen.toggle and bug 1173768.
+      if (oldSizeMode == "fullscreen") {
+        return;
+      }
+    }
+
+    let allowed = (Object.keys(this._disallowed)).length == 0;
+
+    let titlebar = $("titlebar");
+    let titlebarContent = $("titlebar-content");
+    let menubar = $("toolbar-menubar");
+
+    if (allowed) {
+      // We set the tabsintitlebar attribute first so that our CSS for
+      // tabsintitlebar manifests before we do our measurements.
+      document.documentElement.setAttribute("tabsintitlebar", "true");
+      updateTitlebarDisplay();
+
+      // Try to avoid reflows in this code by calculating dimensions first and
+      // then later set the properties affecting layout together in a batch.
+
+      // Get the full height of the tabs toolbar:
+      let tabsToolbar = $("TabsToolbar");
+      let tabsStyles = window.getComputedStyle(tabsToolbar);
+      let fullTabsHeight = rect(tabsToolbar).height + verticalMargins(tabsStyles);
+      // Buttons first:
+      let captionButtonsBoxWidth = rect($("titlebar-buttonbox-container")).width;
+
+      let secondaryButtonsWidth, menuHeight, fullMenuHeight, menuStyles;
+      if (AppConstants.platform == "macosx") {
+        secondaryButtonsWidth = rect($("titlebar-secondary-buttonbox")).width;
+        // No need to look up the menubar stuff on OS X:
+        menuHeight = 0;
+        fullMenuHeight = 0;
+      } else {
+        // Otherwise, get the height and margins separately for the menubar
+        menuHeight = rect(menubar).height;
+        menuStyles = window.getComputedStyle(menubar);
+        fullMenuHeight = verticalMargins(menuStyles) + menuHeight;
+      }
+
+      // And get the height of what's in the titlebar:
+      let titlebarContentHeight = rect(titlebarContent).height;
+
+      // Begin setting CSS properties which will cause a reflow
+
+      // If the menubar is around (menuHeight is non-zero), try to adjust
+      // its full height (i.e. including margins) to match the titlebar,
+      // by changing the menubar's bottom padding
+      if (menuHeight) {
+        // Calculate the difference between the titlebar's height and that of the menubar
+        let menuTitlebarDelta = titlebarContentHeight - fullMenuHeight;
+        let paddingBottom;
+        // The titlebar is bigger:
+        if (menuTitlebarDelta > 0) {
+          fullMenuHeight += menuTitlebarDelta;
+          // If there is already padding on the menubar, we need to add that
+          // to the difference so the total padding is correct:
+          if ((paddingBottom = menuStyles.paddingBottom)) {
+            menuTitlebarDelta += parseFloat(paddingBottom);
+          }
+          menubar.style.paddingBottom = menuTitlebarDelta + "px";
+        // The menubar is bigger, but has bottom padding we can remove:
+        } else if (menuTitlebarDelta < 0 && (paddingBottom = menuStyles.paddingBottom)) {
+          let existingPadding = parseFloat(paddingBottom);
+          // menuTitlebarDelta is negative; work out what's left, but don't set negative padding:
+          let desiredPadding = Math.max(0, existingPadding + menuTitlebarDelta);
+          menubar.style.paddingBottom = desiredPadding + "px";
+          // We've changed the menu height now:
+          fullMenuHeight += desiredPadding - existingPadding;
+        }
+      }
+
+      // Next, we calculate how much we need to stretch the titlebar down to
+      // go all the way to the bottom of the tab strip, if necessary.
+      let tabAndMenuHeight = fullTabsHeight + fullMenuHeight;
+
+      if (tabAndMenuHeight > titlebarContentHeight) {
+        // We need to increase the titlebar content's outer height (ie including margins)
+        // to match the tab and menu height:
+        let extraMargin = tabAndMenuHeight - titlebarContentHeight;
+        if (AppConstants.platform != "macosx") {
+          titlebarContent.style.marginBottom = extraMargin + "px";
+        }
+
+        titlebarContentHeight += extraMargin;
+      } else {
+        titlebarContent.style.removeProperty("margin-bottom");
+      }
+
+      // Then add a negative margin to the titlebar, so that the following elements
+      // will overlap it by the lesser of the titlebar height or the tabstrip+menu.
+      let minTitlebarOrTabsHeight = Math.min(titlebarContentHeight, tabAndMenuHeight);
+      titlebar.style.marginBottom = "-" + minTitlebarOrTabsHeight + "px";
+
+      // Finally, size the placeholders:
+      if (AppConstants.platform == "macosx") {
+        this._sizePlaceholder("fullscreen-button", secondaryButtonsWidth);
+      }
+      this._sizePlaceholder("caption-buttons", captionButtonsBoxWidth);
+
+    } else {
+      document.documentElement.removeAttribute("tabsintitlebar");
+      updateTitlebarDisplay();
+
+      if (AppConstants.platform == "macosx") {
+        let secondaryButtonsWidth = rect($("titlebar-secondary-buttonbox")).width;
+        this._sizePlaceholder("fullscreen-button", secondaryButtonsWidth);
+      }
+
+      // Reset the margins and padding that might have been modified:
+      titlebarContent.style.marginTop = "";
+      titlebarContent.style.marginBottom = "";
+      titlebar.style.marginBottom = "";
+      menubar.style.paddingBottom = "";
+    }
+
+    ToolbarIconColor.inferFromText();
+    if (CustomizationHandler.isCustomizing()) {
+      gCustomizeMode.updateLWTStyling();
+    }
+  },
+
+  _sizePlaceholder: function (type, width) {
+    Array.forEach(document.querySelectorAll(".titlebar-placeholder[type='"+ type +"']"),
+                  function (node) { node.width = width; });
+  },
+
+  uninit: function () {
+    this._initialized = false;
+    removeEventListener("resolutionchange", this);
+    Services.prefs.removeObserver(this._prefName, this);
+    this._menuObserver.disconnect();
+    CustomizableUI.removeListener(this);
+  }
+};
+
+function updateTitlebarDisplay() {
+  if (AppConstants.platform == "macosx") {
+    // OS X and the other platforms differ enough to necessitate this kind of
+    // special-casing. Like the other platforms where we CAN_DRAW_IN_TITLEBAR,
+    // we draw in the OS X titlebar when putting the tabs up there. However, OS X
+    // also draws in the titlebar when a lightweight theme is applied, regardless
+    // of whether or not the tabs are drawn in the titlebar.
+    if (TabsInTitlebar.enabled) {
+      document.documentElement.setAttribute("chromemargin-nonlwtheme", "0,-1,-1,-1");
+      document.documentElement.setAttribute("chromemargin", "0,-1,-1,-1");
+      document.documentElement.removeAttribute("drawtitle");
+    } else {
+      // We set chromemargin-nonlwtheme to "" instead of removing it as a way of
+      // making sure that LightweightThemeConsumer doesn't take it upon itself to
+      // detect this value again if and when we do a lwtheme state change.
+      document.documentElement.setAttribute("chromemargin-nonlwtheme", "");
+      let isCustomizing = document.documentElement.hasAttribute("customizing");
+      let hasLWTheme = document.documentElement.hasAttribute("lwtheme");
+      let isPrivate = PrivateBrowsingUtils.isWindowPrivate(window);
+      if ((!hasLWTheme || isCustomizing) && !isPrivate) {
+        document.documentElement.removeAttribute("chromemargin");
+      }
+      document.documentElement.setAttribute("drawtitle", "true");
+    }
+  } else if (TabsInTitlebar.enabled) {
+    // not OS X
+    document.documentElement.setAttribute("chromemargin", "0,2,2,2");
+  } else {
+    document.documentElement.removeAttribute("chromemargin");
+  }
+}
+
+function onTitlebarMaxClick() {
+  if (window.windowState == window.STATE_MAXIMIZED)
+    window.restore();
+  else
+    window.maximize();
+}