diff options
| -rw-r--r-- | widget/gtk/nsLookAndFeel.cpp | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/widget/gtk/nsLookAndFeel.cpp b/widget/gtk/nsLookAndFeel.cpp index abc0ff061..22d0099ef 100644 --- a/widget/gtk/nsLookAndFeel.cpp +++ b/widget/gtk/nsLookAndFeel.cpp @@ -62,6 +62,22 @@ nsLookAndFeel::~nsLookAndFeel() } #if MOZ_WIDGET_GTK != 2 +// Modifies color |*aDest| as if a pattern of color |aSource| was painted with +// CAIRO_OPERATOR_OVER to a surface with color |*aDest|. +static void +ApplyColorOver(const GdkRGBA& aSource, GdkRGBA* aDest) { + gdouble sourceCoef = aSource.alpha; + gdouble destCoef = aDest->alpha * (1.0 - sourceCoef); + gdouble resultAlpha = sourceCoef + destCoef; + if (resultAlpha != 0.0) { // don't divide by zero + destCoef /= resultAlpha; + sourceCoef /= resultAlpha; + aDest->red = sourceCoef * aSource.red + destCoef * aDest->red; + aDest->green = sourceCoef * aSource.green + destCoef * aDest->green; + aDest->blue = sourceCoef * aSource.blue + destCoef * aDest->blue; + } +} + static void GetLightAndDarkness(const GdkRGBA& aColor, double* aLightness, double* aDarkness) @@ -1291,9 +1307,19 @@ nsLookAndFeel::Init() } #else // Text colors + GdkRGBA bgColor; + // If the text window background is translucent, then the background of + // the textview root node is visible. + style = ClaimStyleContext(MOZ_GTK_TEXT_VIEW); + gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, + &bgColor); + ReleaseStyleContext(style); + style = ClaimStyleContext(MOZ_GTK_TEXT_VIEW_TEXT); - gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color); - sMozFieldBackground = GDK_RGBA_TO_NS_RGBA(color); + gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, + &color); + ApplyColorOver(color, &bgColor); + sMozFieldBackground = GDK_RGBA_TO_NS_RGBA(bgColor); gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color); sMozFieldText = GDK_RGBA_TO_NS_RGBA(color); |