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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/. */
const { MailServices } = ChromeUtils.import(
"resource:///modules/MailServices.jsm"
);
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
Color: "resource://gre/modules/Color.sys.mjs",
});
var EXPORTED_SYMBOLS = ["TagUtils"];
var TagUtils = {
loadTagsIntoCSS,
addTagToAllDocumentSheets,
isColorContrastEnough,
};
function loadTagsIntoCSS(aDocument) {
let tagSheet = findTagColorSheet(aDocument);
let tagArray = MailServices.tags.getAllTags();
for (let tag of tagArray) {
// tag.key is the internal key, like "$label1" for "Important".
// For user defined keys with non-ASCII characters, key is
// the MUTF-7 encoded name.
addTagToSheet(tag.key, tag.color, tagSheet);
}
}
function addTagToAllDocumentSheets(aKey, aColor) {
for (let nextWin of Services.wm.getEnumerator("mail:3pane", true)) {
addTagToSheet(aKey, aColor, findTagColorSheet(nextWin.document));
}
for (let nextWin of Services.wm.getEnumerator("mailnews:search", true)) {
addTagToSheet(aKey, aColor, findTagColorSheet(nextWin.document));
}
}
function addTagToSheet(aKey, aColor, aSheet) {
if (!aSheet) {
return;
}
// Add rules to sheet.
let ruleString1;
let ruleString2;
let ruleString3;
let ruleString4;
let selector = MailServices.tags.getSelectorForKey(aKey);
if (!aColor) {
ruleString1 =
":root[lwt-tree] treechildren::-moz-tree-row(" +
selector +
", selected, focus) { background-color: " +
"var(--sidebar-highlight-background-color) !important; }";
ruleString2 =
"treechildren::-moz-tree-cell-text(" +
selector +
", selected, focus) { color: SelectedItemText !important; }";
ruleString3 =
"tree:-moz-lwtheme treechildren::-moz-tree-cell-text(" +
selector +
", selected) { color: currentColor !important; }";
ruleString4 =
":root[lwt-tree] treechildren::-moz-tree-cell-text(" +
selector +
", selected, focus) { color: var(--sidebar-highlight-text-color, " +
"var(--sidebar-text-color)) !important; }";
} else {
ruleString1 =
"treechildren::-moz-tree-row(" +
selector +
", selected, focus) { background-color: " +
aColor +
" !important; outline-color: color-mix(in srgb, " +
aColor +
", black 25%); }";
ruleString2 =
"treechildren::-moz-tree-cell-text(" +
selector +
") { color: " +
aColor +
"; }";
let textColor = "black";
if (!isColorContrastEnough(aColor)) {
textColor = "white";
}
ruleString3 =
"treechildren::-moz-tree-cell-text(" +
selector +
", selected, focus) { color: " +
textColor +
" }";
ruleString4 =
"treechildren::-moz-tree-image(" +
selector +
", selected, focus)," +
"treechildren::-moz-tree-twisty(" +
selector +
", selected, focus) { --select-focus-text-color: " +
textColor +
"; }";
}
try {
aSheet.insertRule(ruleString1, aSheet.cssRules.length);
aSheet.insertRule(ruleString2, aSheet.cssRules.length);
aSheet.insertRule(ruleString3, aSheet.cssRules.length);
aSheet.insertRule(ruleString4, aSheet.cssRules.length);
} catch (ex) {
aSheet.ownerNode.addEventListener(
"load",
() => addTagToSheet(aKey, aColor, aSheet),
{ once: true }
);
}
}
function findTagColorSheet(aDocument) {
const cssUri = "chrome://messenger/skin/tagColors.css";
let tagSheet = null;
for (let sheet of aDocument.styleSheets) {
if (sheet.href == cssUri) {
tagSheet = sheet;
break;
}
}
if (!tagSheet) {
console.error("TagUtils.findTagColorSheet: tagColors.css not found");
}
return tagSheet;
}
/* Checks if black writing on 'aColor' background has enough contrast */
function isColorContrastEnough(aColor) {
// Is a color set? If not, return "true" to use the default color.
if (!aColor) {
return true;
}
// Zero-pad the number just to make sure that it is 8 digits.
let colorHex = ("00000000" + aColor).substr(-8);
let colorArray = colorHex.match(/../g);
let [, cR, cG, cB] = colorArray.map(val => parseInt(val, 16));
return new lazy.Color(cR, cG, cB).isContrastRatioAcceptable(
new lazy.Color(0, 0, 0),
"AAA"
);
}
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