Remove unused CSS files related to Zen theme

src/browser/base/content/ZenStartup.mjs

@@ -0,0 +1,106 @@
+
+var ZenStartup = {
+  init() {
+    this._changeSidebarLocation();
+    this._zenInitBrowserLayout();
+  },
+
+  _zenInitBrowserLayout() {
+    if (this.__hasInitBrowserLayout) return;
+    this.__hasInitBrowserLayout = true;
+    this.openWatermark();
+    console.info("ZenThemeModifier: init browser layout");
+    const kNavbarItems = [
+      "nav-bar",
+      "PersonalToolbar"
+    ];
+    const kNewContainerId = "zen-appcontent-navbar-container";
+    let newContainer = document.getElementById(kNewContainerId);
+    for (let id of kNavbarItems) {
+      const node = document.getElementById(id);
+      console.assert(node, "Could not find node with id: " + id);
+      if (!node) continue;
+      newContainer.appendChild(node);
+    }
+
+    // Fix notification deck
+    document.getElementById("zen-appcontent-navbar-container")
+      .appendChild(document.getElementById("tab-notification-deck-template"));
+
+    gZenVerticalTabsManager.init();
+    gZenCompactModeManager.init();
+    gZenKeyboardShortcuts.init();
+
+    function throttle(f, delay) {
+      let timer = 0;
+      return function(...args) {
+          clearTimeout(timer);
+          timer = setTimeout(() => f.apply(this, args), delay);
+      }
+    }
+
+    new ResizeObserver(throttle(
+      this._updateTabsToolbar.bind(this), 1000
+    )).observe(document.getElementById("tabbrowser-tabs"));
+
+    this.closeWatermark();
+  },
+
+  _updateTabsToolbar() {
+    // Set tabs max-height to the "toolbar-items" height
+    const toolbarItems = document.getElementById("tabbrowser-tabs");
+    const tabs = document.getElementById("tabbrowser-arrowscrollbox");
+    tabs.style.maxHeight = '0px'; // reset to 0
+    const toolbarRect = toolbarItems.getBoundingClientRect();
+    // -5 for the controls padding
+    tabs.style.maxHeight = toolbarRect.height - 5 + "px";
+    console.info("ZenThemeModifier: set tabs max-height to", toolbarRect.height + "px");
+  },
+
+  openWatermark() {
+    if (!Services.prefs.getBoolPref("zen.watermark.enabled", false)) {
+      return;
+    }
+    const watermark = window.MozXULElement.parseXULToFragment(`
+      <html:div id="zen-watermark">
+        <image src="chrome://branding/content/about-logo.png" />
+      </html:div>
+    `);
+    document.body.appendChild(watermark);
+  },
+
+  closeWatermark() {
+    const watermark = document.getElementById("zen-watermark");
+    if (watermark) {
+      watermark.setAttribute("hidden", "true");
+    }
+  },
+
+  _changeSidebarLocation() {
+    const kElementsToAppend = [
+      "sidebar-splitter",
+      "sidebar-box",
+      "navigator-toolbox",
+    ];
+    const wrapper = document.getElementById("zen-tabbox-wrapper");
+    const appWrapepr = document.getElementById("zen-sidebar-box-container");
+    for (let id of kElementsToAppend) {
+      const elem = document.getElementById(id);
+      if (elem) {
+        wrapper.prepend(elem);
+      }
+    }
+    appWrapepr.setAttribute("hidden", "true");
+
+    // Set a splitter to navigator-toolbox
+    const splitter = document.createXULElement("splitter");
+    splitter.setAttribute("id", "zen-sidebar-splitter");
+    splitter.setAttribute("orient", "horizontal");
+    splitter.setAttribute("resizebefore", "sibling");
+    splitter.setAttribute("resizeafter", "none");
+    const titlebar = document.getElementById("navigator-toolbox");
+    titlebar.insertAdjacentElement("afterend", splitter);
+  },
+};
+
+ZenStartup.init();