Some themes (Ambiance for instance) uses first-child/last-child css selectors
to style titlebar buttons. Ubuntu Ambiance theme places titlebar buttons closer
by negative margin applied to them.
We put titlebar buttons to GtkBox as well as Gtk+ does and also keep
the button order here to match first-child/last-child selectors. It also means
we must have maximize/restore as one button to keep the correct order.
MozReview-Commit-ID: 9mqljOa4Vu7
GtkHeaderBar has property "spacing" which defines space between buttons at titlebar.
Get this property and apply as margin to titlebar buttons when there's more than one.
Also cache this value for furter use at titlebar metrics cache.
MozReview-Commit-ID: J7qAIWEnK4Y
We need to use scaling factor of the monitor on which application is actually positioned.
Previously we used ScreenHelperGTK::GetGTKMonitorScaleFactor() which use the first monitor.
This does not work on hidpi+normal dpi monitors setup.
The GetSystemFontInfo() cannot return scaled value of the font by default monitor
scale factor. We need to scale it in nsLookAndFeel::GetFontImpl
by aDevPixPerCSSPixel like implementation for Windows does.
We also need to check layout.css.devPixelsPerPx because we cannot
scale per monitor when this preference is set to positive number.
MozReview-Commit-ID: AwT2NvkEqvz
We need to use scaling factor of the monitor on which application is actually positioned.
Previously we used ScreenHelperGTK::GetGTKMonitorScaleFactor() which use the first monitor.
This does not work on hidpi+normal dpi monitors setup.
The GetSystemFontInfo() cannot return scaled value of the font by default monitor
scale factor. We need to scale it in nsLookAndFeel::GetFontImpl
by aDevPixPerCSSPixel like implementation for Windows does.
We also need to check layout.css.devPixelsPerPx because we cannot
scale per monitor when this preference is set to positive number.
MozReview-Commit-ID: AwT2NvkEqvz
The GetSystemFontInfo() cannot return scaled value of the font by default monitor
scale factor. We need to scale it in nsLookAndFeel::GetFontImpl
by aDevPixPerCSSPixel like implementation for Windows does.
MozReview-Commit-ID: 5okD8vUu9UK
The browser.tabs.drawInTitlebar check at nsLookAndFeel is redundant, breaks Thunderbird and dynamic titlebar rendering change. Let's use browser.tabs.drawInTitlebar at browser level and when enabled configure titlebar visibility by moz_gtk* media atoms.
MozReview-Commit-ID: IhCYmXgVME7
GTK should be used only from the main thread, but the specific symptom before
this change was that creating a GtkEntry causes
pango_cairo_font_map_get_default() to be called. This function returns a
different font map on each thread. The font map is leaked when StyleThreads
are leaked at exit.
Font caches are usually expensive and so using the existing font map on the
main thread is preferable.
A GtkEntry already exists on the main thread, as well as style contexts for
most other system fonts, and so it is more efficient to create these on the
main thread while the style contexts exist.
Doing this also avoids the need for Gecko_nsFont_InitSystem() to hold a global
lock to avoid concurrently calling into GTK through LookAndFeel::GetColor().
MozReview-Commit-ID: DSOwEUeYmtV
Add two new prefs (widget.chrome.allow-gtk-dark-theme and widget.content.allow-gtk-dark-theme) to enable dark
themes in chrome and content when e10s is enabled.
When e10s is disabled then widget.chrome.allow-gtk-dark-theme controls both chrome and web content settings.
That may be a bit confusing but it's going to be here for two releases only (Firefox 57 is going to have e10s enabled by default) and actually matches recent state when only one ENV pref is used for both chrome and web content.
The existing MOZ_ALLOW_GTK_DARK_THEME environment variable is still considered, but, now is like widget.chrome.allow-gtk-dark-theme, no longer affecting separate content processes.
MozReview-Commit-ID: CCwriA66CNj
This was used with GTK2, but is now unnecessary as discussed in bug 1278282.
moz_gtk_init() is now called from only one place and so will be called only
once.
MozReview-Commit-ID: 2KwJop6qsV9
