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https://gitlab.winehq.org/wine/wine-gecko.git
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bug 851520 - add systemDefaultScale attribute to nsIScreenManager, and use it to decide when to remove browser.content.full-zoom prefs during UI migration if running on windows/hi-dpi. r=roc,adw
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@ -1223,7 +1223,7 @@ BrowserGlue.prototype = {
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},
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_migrateUI: function BG__migrateUI() {
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const UI_VERSION = 9;
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const UI_VERSION = 10;
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const BROWSER_DOCURL = "chrome://browser/content/browser.xul#";
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let currentUIVersion = 0;
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try {
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@ -1366,6 +1366,21 @@ BrowserGlue.prototype = {
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Services.prefs.clearUserPref("browser.library.useNewDownloadsView");
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}
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#ifdef XP_WIN
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if (currentUIVersion < 10) {
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// For Windows systems with display set to > 96dpi (i.e. systemDefaultScale
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// will return a value > 1.0), we want to discard any saved full-zoom settings,
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// as we'll now be scaling the content according to the system resolution
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// scale factor (Windows "logical DPI" setting)
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let sm = Cc["@mozilla.org/gfx/screenmanager;1"].getService(Ci.nsIScreenManager);
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if (sm.systemDefaultScale > 1.0) {
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let cps2 = Cc["@mozilla.org/content-pref/service;1"].
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getService(Ci.nsIContentPrefService2);
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cps2.removeByName("browser.content.full-zoom", null);
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}
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}
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#endif
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if (this._dirty)
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this._dataSource.QueryInterface(Ci.nsIRDFRemoteDataSource).Flush();
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@ -105,3 +105,9 @@ nsScreenManagerAndroid::GetNumberOfScreens(uint32_t *aNumberOfScreens)
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenManagerAndroid::GetSystemDefaultScale(float *aDefaultScale)
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{
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*aDefaultScale = 1.0f;
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return NS_OK;
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}
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@ -96,6 +96,13 @@ nsScreenManagerCocoa::GetNumberOfScreens (uint32_t *aNumberOfScreens)
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NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
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}
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NS_IMETHODIMP
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nsScreenManagerCocoa::GetSystemDefaultScale(float *aDefaultScale)
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{
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*aDefaultScale = 1.0f;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenManagerCocoa::ScreenForNativeWidget (void *nativeWidget, nsIScreen **outScreen)
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{
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@ -872,3 +872,10 @@ nsScreenManagerGonk::GetNumberOfScreens(uint32_t *aNumberOfScreens)
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*aNumberOfScreens = 1;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenManagerGonk::GetSystemDefaultScale(float *aDefaultScale)
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{
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*aDefaultScale = 1.0f;
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return NS_OK;
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}
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@ -284,6 +284,13 @@ nsScreenManagerGtk :: GetNumberOfScreens(uint32_t *aNumberOfScreens)
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} // GetNumberOfScreens
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NS_IMETHODIMP
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nsScreenManagerGtk::GetSystemDefaultScale(float *aDefaultScale)
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{
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*aDefaultScale = 1.0f;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenManagerGtk :: ScreenForNativeWidget (void *aWidget, nsIScreen **outScreen)
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{
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@ -7,7 +7,7 @@
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#include "nsISupports.idl"
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#include "nsIScreen.idl"
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[scriptable, uuid(B92319E6-9A84-4ca7-A2CC-EEC22EA9854E)]
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[scriptable, uuid(1C195990-FF9E-412B-AFE7-67D1C660BB27)]
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interface nsIScreenManager : nsISupports
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{
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//
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@ -25,6 +25,26 @@ interface nsIScreenManager : nsISupports
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// Holds the number of screens that are available
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readonly attribute unsigned long numberOfScreens;
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// The default DPI scaling factor of the screen environment (number of
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// screen pixels corresponding to 1 CSS px, at the default zoom level).
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//
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// This is currently fixed at 1.0 on most platforms, but varies on Windows
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// if the "logical DPI" scaling option in the Display control panel is set
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// to a value other than 100% (e.g. 125% or 150% are increasingly common
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// defaults on laptops with high-dpi screens). See bug 851520.
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//
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// NOTE that on OS X, this does -not- reflect the "backing scale factor"
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// used to support Retina displays, which is a per-display property,
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// not a system-wide scaling factor. The default ratio of CSS pixels to
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// Cocoa points remains 1:1, even on a Retina screen where one Cocoa point
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// corresponds to two device pixels. (This is exposed via other APIs:
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// see window.devicePixelRatio).
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//
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// NOTE also that on Linux, this does -not- currently reflect changes
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// to the system-wide (X11 or Gtk2) DPI value, as Firefox does not yet
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// honor these settings. See bug 798362 and bug 712898.
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readonly attribute float systemDefaultScale;
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// Returns the nsIScreen instance for the given native widget pointer;
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// the pointer is specific to the particular widget implementation,
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// and is generally of the same type that NS_NATIVE_WINDOW is.
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@ -91,6 +91,13 @@ nsScreenManagerOS2 :: GetNumberOfScreens(uint32_t *aNumberOfScreens)
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} // GetNumberOfScreens
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NS_IMETHODIMP
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nsScreenManagerOS2::GetSystemDefaultScale(float *aDefaultScale)
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{
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*aDefaultScale = 1.0f;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenManagerOS2 :: ScreenForNativeWidget(void *nativeWidget, nsIScreen **aScreen)
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{
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@ -99,6 +99,13 @@ nsScreenManagerQt::GetNumberOfScreens(uint32_t *aNumberOfScreens)
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenManagerQt::GetSystemDefaultScale(float *aDefaultScale)
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{
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*aDefaultScale = 1.0f;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenManagerQt :: ScreenForNativeWidget (void *aWidget, nsIScreen **outScreen)
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{
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@ -154,6 +154,13 @@ nsScreenManagerWin :: GetNumberOfScreens(uint32_t *aNumberOfScreens)
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} // GetNumberOfScreens
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NS_IMETHODIMP
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nsScreenManagerWin::GetSystemDefaultScale(float *aDefaultScale)
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{
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*aDefaultScale = float(gfxWindowsPlatform::GetPlatform()->GetDPIScale());
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenManagerWin :: ScreenForNativeWidget(void *aWidget, nsIScreen **outScreen)
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{
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@ -762,5 +762,12 @@ PuppetScreenManager::GetNumberOfScreens(uint32_t* aNumberOfScreens)
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return NS_OK;
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}
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NS_IMETHODIMP
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PuppetScreenManager::GetSystemDefaultScale(float *aDefaultScale)
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{
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*aDefaultScale = 1.0f;
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return NS_OK;
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}
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} // namespace widget
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} // namespace mozilla
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