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Bug 1004576 - Background tabs are unreadable when the Color Intensity of the window frame is at or near its lowest point (white text on light-grey window frame). r=Gijs

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--HG--
extra : rebase_source : 2fb257c889c8613aba6f488f5a4c867a34f85944
This commit is contained in:
Jared Wein 2014-05-05 18:41:40 -04:00
parent 0b2ab77a19
commit 6741fed037
1 changed files with 19 additions and 9 deletions
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28
browser/modules/Windows8WindowFrameColor.jsm
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@ -9,7 +9,7 @@ this.EXPORTED_SYMBOLS = ["Windows8WindowFrameColor"];
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/WindowsRegistry.jsm");
let Registry = Cu.import("resource://gre/modules/WindowsRegistry.jsm").WindowsRegistry;
const Windows8WindowFrameColor = {
_windowFrameColor: null,
@ -18,16 +18,26 @@ const Windows8WindowFrameColor = {
if (this._windowFrameColor)
return this._windowFrameColor;
let windowFrameColor = WindowsRegistry.readRegKey(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
"Software\\Microsoft\\Windows\\DWM",
"ColorizationColor");
const HKCU = Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER;
const dwmKey = "Software\\Microsoft\\Windows\\DWM";
let customizationColor = Registry.readRegKey(HKCU, dwmKey,
"ColorizationColor");
// The color returned from the Registry is in decimal form.
let windowFrameColorHex = windowFrameColor.toString(16);
let customizationColorHex = customizationColor.toString(16);
// Zero-pad the number just to make sure that it is 8 digits.
windowFrameColorHex = ("00000000" + windowFrameColorHex).substr(-8);
let windowFrameColorArray = windowFrameColorHex.match(/../g);
let [pixelA, pixelR, pixelG, pixelB] = windowFrameColorArray.map(function(val) parseInt(val, 16));
customizationColorHex = ("00000000" + customizationColorHex).substr(-8);
let customizationColorArray = customizationColorHex.match(/../g);
let [unused, fgR, fgG, fgB] = customizationColorArray.map(function(val) parseInt(val, 16));
let colorizationColorBalance = Registry.readRegKey(HKCU, dwmKey,
"ColorizationColorBalance");
// Window frame base color when Color Intensity is at 0, see bug 1004576.
let frameBaseColor = 217;
let alpha = colorizationColorBalance / 100;
return this._windowFrameColor = [pixelR, pixelG, pixelB];
// Alpha-blend the foreground color with the frame base color.
let r = Math.round(fgR * alpha + frameBaseColor * (1 - alpha));
let g = Math.round(fgG * alpha + frameBaseColor * (1 - alpha));
let b = Math.round(fgB * alpha + frameBaseColor * (1 - alpha));
return this._windowFrameColor = [r, g, b];
},
};