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/**
* 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 { AppConstants } = ChromeUtils.importESModule(
"resource://gre/modules/AppConstants.sys.mjs"
);
var ToolbarIconColor = {
_windowState: {
active: false,
fullscreen: false,
tabsintitlebar: false,
},
init() {
this._initialized = true;
window.addEventListener("activate", this);
window.addEventListener("deactivate", this);
window.addEventListener("toolbarvisibilitychange", this);
window.addEventListener("windowlwthemeupdate", this);
// If the window isn't active now, we assume that it has never been active
// before and will soon become active such that inferFromText will be
// called from the initial activate event.
if (Services.focus.activeWindow == window) {
this.inferFromText("activate");
}
},
uninit() {
this._initialized = false;
window.removeEventListener("activate", this);
window.removeEventListener("deactivate", this);
window.removeEventListener("toolbarvisibilitychange", this);
window.removeEventListener("windowlwthemeupdate", this);
},
handleEvent(event) {
switch (event.type) {
case "activate":
case "deactivate":
case "windowlwthemeupdate":
this.inferFromText(event.type);
break;
case "toolbarvisibilitychange":
this.inferFromText(event.type, event.visible);
break;
}
},
// A cache of luminance values for each toolbar to avoid unnecessary calls to
// getComputedStyle().
_toolbarLuminanceCache: new Map(),
// A cache of the current sidebar color to avoid unnecessary conditions and
// luminance calculations.
_sidebarColorCache: null,
inferFromText(reason, reasonValue) {
if (!this._initialized) {
return;
}
function parseRGB(aColorString) {
let rgb = aColorString.match(/^rgba?\((\d+), (\d+), (\d+)/);
rgb.shift();
return rgb.map(x => parseInt(x));
}
switch (reason) {
case "activate": // falls through.
case "deactivate":
this._windowState.active = reason === "activate";
break;
case "fullscreen":
this._windowState.fullscreen = reasonValue;
break;
case "windowlwthemeupdate":
// Theme change, we'll need to recalculate all color values.
this._toolbarLuminanceCache.clear();
this._sidebarColorCache = null;
break;
case "toolbarvisibilitychange":
// Toolbar changes dont require reset of the cached color values.
break;
case "tabsintitlebar":
this._windowState.tabsintitlebar = reasonValue;
break;
}
let toolbarSelector = "toolbox > toolbar:not([collapsed=true])";
if (AppConstants.platform == "macosx") {
toolbarSelector += ":not([type=menubar])";
}
toolbarSelector += ", .toolbar";
// The getComputedStyle calls and setting the brighttext are separated in
// two loops to avoid flushing layout and making it dirty repeatedly.
let cachedLuminances = this._toolbarLuminanceCache;
let luminances = new Map();
for (let toolbar of document.querySelectorAll(toolbarSelector)) {
// Toolbars *should* all have ids, but guard anyway to avoid blowing up.
let cacheKey =
toolbar.id && toolbar.id + JSON.stringify(this._windowState);
// Lookup cached luminance value for this toolbar in this window state.
let luminance = cacheKey && cachedLuminances.get(cacheKey);
if (isNaN(luminance)) {
let [r, g, b] = parseRGB(getComputedStyle(toolbar).color);
luminance = 0.2125 * r + 0.7154 * g + 0.0721 * b;
if (cacheKey) {
cachedLuminances.set(cacheKey, luminance);
}
}
luminances.set(toolbar, luminance);
}
const luminanceThreshold = 127; // In between 0 and 255
for (let [toolbar, luminance] of luminances) {
if (luminance <= luminanceThreshold) {
toolbar.removeAttribute("brighttext");
} else {
toolbar.setAttribute("brighttext", "true");
}
}
// On Linux, we need to detect if the OS theme caused a text color change in
// the sidebar icons and properly update the brighttext attribute.
if (
reason == "activate" &&
AppConstants.platform == "linux" &&
Services.prefs.getCharPref("extensions.activeThemeID", "") ==
"default-theme@mozilla.org"
) {
let folderTree = document.getElementById("folderTree");
if (!folderTree) {
return;
}
let sidebarColor = getComputedStyle(folderTree).color;
// Interrupt if the sidebar color didn't change.
if (sidebarColor == this._sidebarColorCache) {
return;
}
this._sidebarColorCache = sidebarColor;
let mainWindow = document.getElementById("messengerWindow");
if (!mainWindow) {
return;
}
let [r, g, b] = parseRGB(sidebarColor);
let luminance = 0.2125 * r + 0.7154 * g + 0.0721 * b;
if (luminance <= 110) {
mainWindow.removeAttribute("lwt-tree-brighttext");
} else {
mainWindow.setAttribute("lwt-tree-brighttext", "true");
}
}
},
};
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