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Revert "Revert "For mozcentral use Firefox color theme instead of system theme." since -moz-toolbar-prefers-color-scheme was removed"

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This reverts commit aae8a21286.
This commit is contained in:
Brendan Dahl 2022-01-04 17:15:21 -08:00
parent e788665a26
commit 86c9a8970b
2 changed files with 16 additions and 8 deletions
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18
web/app.js
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@ -431,21 +431,23 @@ const PDFViewerApplication = {
try {
const styleSheet = document.styleSheets[0];
const cssRules = styleSheet?.cssRules || [];
const mediaMatcher =
typeof PDFJSDev !== "undefined" && PDFJSDev.test("MOZCENTRAL")
? "-moz-toolbar-prefers-color-scheme"
: "prefers-color-scheme";
const mediaRule = `(${mediaMatcher}: dark)`;
const mediaRegex = new RegExp(
`^@media \\(${mediaMatcher}: dark\\) {\\n\\s*([\\w\\s-.,:;/\\\\{}()]+)\\n}$`
);
for (let i = 0, ii = cssRules.length; i < ii; i++) {
const rule = cssRules[i];
if (
rule instanceof CSSMediaRule &&
rule.media?.[0] === "(prefers-color-scheme: dark)"
) {
if (rule instanceof CSSMediaRule && rule.media?.[0] === mediaRule) {
if (cssTheme === ViewerCssTheme.LIGHT) {
styleSheet.deleteRule(i);
return;
}
// cssTheme === ViewerCssTheme.DARK
const darkRules =
/^@media \(prefers-color-scheme: dark\) {\n\s*([\w\s-.,:;/\\{}()]+)\n}$/.exec(
rule.cssText
);
const darkRules = mediaRegex.exec(rule.cssText);
if (darkRules?.[1]) {
styleSheet.deleteRule(i);
styleSheet.insertRule(darkRules[1], i);