Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 218 insertions, 0 deletions

diff --git a/browser/base/content/contentTheme.js b/browser/base/content/contentTheme.js
new file mode 100644
index 0000000000..a2298986ba
--- /dev/null
+++ b/browser/base/content/contentTheme.js
@@ -0,0 +1,218 @@
+/* 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/. */
+
+"use strict";
+
+{
+  const prefersDarkQuery = window.matchMedia("(prefers-color-scheme: dark)");
+
+  function _isTextColorDark(r, g, b) {
+    return 0.2125 * r + 0.7154 * g + 0.0721 * b <= 110;
+  }
+
+  const inContentVariableMap = [
+    [
+      "--newtab-background-color",
+      {
+        lwtProperty: "ntp_background",
+        processColor(rgbaChannels) {
+          if (!rgbaChannels) {
+            return null;
+          }
+          const { r, g, b } = rgbaChannels;
+          // Drop alpha channel
+          return `rgb(${r}, ${g}, ${b})`;
+        },
+      },
+    ],
+    [
+      "--newtab-background-color-secondary",
+      {
+        lwtProperty: "ntp_card_background",
+      },
+    ],
+    [
+      "--newtab-text-primary-color",
+      {
+        lwtProperty: "ntp_text",
+        processColor(rgbaChannels, element) {
+          // We only have access to the browser when we're in a chrome
+          // docshell, so for now only set the color scheme in that case, and
+          // use the `lwt-newtab-brighttext` attribute as a fallback mechanism.
+          let browserStyle =
+            element.ownerGlobal?.docShell?.chromeEventHandler.style;
+
+          if (!rgbaChannels) {
+            element.removeAttribute("lwt-newtab");
+            element.toggleAttribute(
+              "lwt-newtab-brighttext",
+              prefersDarkQuery.matches
+            );
+            if (browserStyle) {
+              browserStyle.colorScheme = "";
+            }
+            return null;
+          }
+
+          element.setAttribute("lwt-newtab", "true");
+          const { r, g, b, a } = rgbaChannels;
+          let darkMode = !_isTextColorDark(r, g, b);
+          element.toggleAttribute("lwt-newtab-brighttext", darkMode);
+          if (browserStyle) {
+            browserStyle.colorScheme = darkMode ? "dark" : "light";
+          }
+
+          return `rgba(${r}, ${g}, ${b}, ${a})`;
+        },
+      },
+    ],
+    [
+      "--in-content-zap-gradient",
+      {
+        lwtProperty: "zap_gradient",
+        processColor(value) {
+          return value;
+        },
+      },
+    ],
+    [
+      "--lwt-sidebar-background-color",
+      {
+        lwtProperty: "sidebar",
+        processColor(rgbaChannels) {
+          if (!rgbaChannels) {
+            return null;
+          }
+          const { r, g, b } = rgbaChannels;
+          // Drop alpha channel
+          return `rgb(${r}, ${g}, ${b})`;
+        },
+      },
+    ],
+    [
+      "--lwt-sidebar-text-color",
+      {
+        lwtProperty: "sidebar_text",
+        processColor(rgbaChannels, element) {
+          if (!rgbaChannels) {
+            element.removeAttribute("lwt-sidebar");
+            element.removeAttribute("lwt-sidebar-brighttext");
+            return null;
+          }
+
+          element.setAttribute("lwt-sidebar", "true");
+          const { r, g, b, a } = rgbaChannels;
+          if (!_isTextColorDark(r, g, b)) {
+            element.setAttribute("lwt-sidebar-brighttext", "true");
+          } else {
+            element.removeAttribute("lwt-sidebar-brighttext");
+          }
+
+          return `rgba(${r}, ${g}, ${b}, ${a})`;
+        },
+      },
+    ],
+    [
+      "--lwt-sidebar-highlight-background-color",
+      {
+        lwtProperty: "sidebar_highlight",
+        processColor(rgbaChannels, element) {
+          if (!rgbaChannels) {
+            element.removeAttribute("lwt-sidebar-highlight");
+            return null;
+          }
+          element.setAttribute("lwt-sidebar-highlight", "true");
+
+          const { r, g, b, a } = rgbaChannels;
+          return `rgba(${r}, ${g}, ${b}, ${a})`;
+        },
+      },
+    ],
+    [
+      "--lwt-sidebar-highlight-text-color",
+      {
+        lwtProperty: "sidebar_highlight_text",
+      },
+    ],
+  ];
+
+  /**
+   * ContentThemeController handles theme updates sent by the frame script.
+   * To be able to use ContentThemeController, you must add your page to the whitelist
+   * in LightweightThemeChildListener.jsm
+   */
+  const ContentThemeController = {
+    /**
+     * Listen for theming updates from the LightweightThemeChild actor, and
+     * begin listening to changes in preferred color scheme.
+     */
+    init() {
+      addEventListener("LightweightTheme:Set", this);
+
+      // We don't sync default theme attributes in `init()`, as we may not have
+      // a root element to attach the attribute to yet. They will be set when
+      // the first LightweightTheme:Set event is delivered during pageshow.
+      prefersDarkQuery.addEventListener("change", this);
+    },
+
+    /**
+     * Handle theme updates from the LightweightThemeChild actor or due to
+     * changes to the prefers-color-scheme media query.
+     * @param {Object} event object containing the theme or query update.
+     */
+    handleEvent(event) {
+      const root = document.documentElement;
+
+      if (event.type == "LightweightTheme:Set") {
+        let { data } = event.detail;
+        if (!data) {
+          data = {};
+        }
+        this._setProperties(root, data);
+      } else if (event.type == "change") {
+        // If a lightweight theme doesn't apply, update lwt-newtab-brighttext to
+        // reflect prefers-color-scheme.
+        if (!root.hasAttribute("lwt-newtab")) {
+          root.toggleAttribute("lwt-newtab-brighttext", event.matches);
+        }
+      }
+    },
+
+    /**
+     * Set a CSS variable to a given value
+     * @param {Element} elem The element where the CSS variable should be added.
+     * @param {string} variableName The CSS variable to set.
+     * @param {string} value The new value of the CSS variable.
+     */
+    _setProperty(elem, variableName, value) {
+      if (value) {
+        elem.style.setProperty(variableName, value);
+      } else {
+        elem.style.removeProperty(variableName);
+      }
+    },
+
+    /**
+     * Apply theme data to an element
+     * @param {Element} root The element where the properties should be applied.
+     * @param {Object} themeData The theme data.
+     */
+    _setProperties(elem, themeData) {
+      for (let [cssVarName, definition] of inContentVariableMap) {
+        const { lwtProperty, processColor } = definition;
+        let value = themeData[lwtProperty];
+
+        if (processColor) {
+          value = processColor(value, elem);
+        } else if (value) {
+          const { r, g, b, a } = value;
+          value = `rgba(${r}, ${g}, ${b}, ${a})`;
+        }
+
+        this._setProperty(elem, cssVarName, value);
+      }
+    },
+  };
+  ContentThemeController.init();
+}