gecko-dev/widget/cocoa/nsCocoaUtils.mm

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "gfxImageSurface.h"
#include "nsCocoaUtils.h"
#include "nsChildView.h"
#include "nsMenuBarX.h"
#include "nsCocoaWindow.h"
#include "nsCOMPtr.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIAppShellService.h"
#include "nsIXULWindow.h"
#include "nsIBaseWindow.h"
#include "nsIServiceManager.h"
#include "nsMenuUtilsX.h"
#include "nsToolkit.h"
#include "nsGUIEvent.h"
#include "mozilla/Preferences.h"
using namespace mozilla;
using namespace mozilla::widget;
static float
MenuBarScreenHeight()
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
NSArray* allScreens = [NSScreen screens];
if ([allScreens count]) {
return [[allScreens objectAtIndex:0] frame].size.height;
}
return 0.0;
NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(0.0);
}
float
nsCocoaUtils::FlippedScreenY(float y)
{
return MenuBarScreenHeight() - y;
}
NSRect nsCocoaUtils::GeckoRectToCocoaRect(const nsIntRect &geckoRect)
{
// We only need to change the Y coordinate by starting with the primary screen
// height and subtracting the gecko Y coordinate of the bottom of the rect.
return NSMakeRect(geckoRect.x,
MenuBarScreenHeight() - geckoRect.YMost(),
geckoRect.width,
geckoRect.height);
}
NSRect nsCocoaUtils::GeckoRectToCocoaRectDevPix(const nsIntRect &aGeckoRect,
CGFloat aBackingScale)
{
return NSMakeRect(aGeckoRect.x / aBackingScale,
MenuBarScreenHeight() - aGeckoRect.YMost() / aBackingScale,
aGeckoRect.width / aBackingScale,
aGeckoRect.height / aBackingScale);
}
nsIntRect nsCocoaUtils::CocoaRectToGeckoRect(const NSRect &cocoaRect)
{
// We only need to change the Y coordinate by starting with the primary screen
// height and subtracting both the cocoa y origin and the height of the
// cocoa rect.
nsIntRect rect;
rect.x = NSToIntRound(cocoaRect.origin.x);
rect.y = NSToIntRound(FlippedScreenY(cocoaRect.origin.y + cocoaRect.size.height));
rect.width = NSToIntRound(cocoaRect.origin.x + cocoaRect.size.width) - rect.x;
rect.height = NSToIntRound(FlippedScreenY(cocoaRect.origin.y)) - rect.y;
return rect;
}
nsIntRect nsCocoaUtils::CocoaRectToGeckoRectDevPix(const NSRect &aCocoaRect,
CGFloat aBackingScale)
{
nsIntRect rect;
rect.x = NSToIntRound(aCocoaRect.origin.x * aBackingScale);
rect.y = NSToIntRound(FlippedScreenY(aCocoaRect.origin.y + aCocoaRect.size.height) * aBackingScale);
rect.width = NSToIntRound((aCocoaRect.origin.x + aCocoaRect.size.width) * aBackingScale) - rect.x;
rect.height = NSToIntRound(FlippedScreenY(aCocoaRect.origin.y) * aBackingScale) - rect.y;
return rect;
}
NSPoint nsCocoaUtils::ScreenLocationForEvent(NSEvent* anEvent)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
// Don't trust mouse locations of mouse move events, see bug 443178.
if (!anEvent || [anEvent type] == NSMouseMoved)
return [NSEvent mouseLocation];
// Pin momentum scroll events to the location of the last user-controlled
// scroll event.
if (IsMomentumScrollEvent(anEvent))
return ChildViewMouseTracker::sLastScrollEventScreenLocation;
return [[anEvent window] convertBaseToScreen:[anEvent locationInWindow]];
NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NSMakePoint(0.0, 0.0));
}
BOOL nsCocoaUtils::IsEventOverWindow(NSEvent* anEvent, NSWindow* aWindow)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
return NSPointInRect(ScreenLocationForEvent(anEvent), [aWindow frame]);
NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NO);
}
NSPoint nsCocoaUtils::EventLocationForWindow(NSEvent* anEvent, NSWindow* aWindow)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
return [aWindow convertScreenToBase:ScreenLocationForEvent(anEvent)];
NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NSMakePoint(0.0, 0.0));
}
BOOL nsCocoaUtils::IsMomentumScrollEvent(NSEvent* aEvent)
{
if ([aEvent type] != NSScrollWheel)
return NO;
if ([aEvent respondsToSelector:@selector(momentumPhase)])
return ([aEvent momentumPhase] & NSEventPhaseChanged) != 0;
if ([aEvent respondsToSelector:@selector(_scrollPhase)])
return [aEvent _scrollPhase] != 0;
return NO;
}
void nsCocoaUtils::HideOSChromeOnScreen(bool aShouldHide, NSScreen* aScreen)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
// Keep track of how many hiding requests have been made, so that they can
// be nested.
static int sMenuBarHiddenCount = 0, sDockHiddenCount = 0;
// Always hide the Dock, since it's not necessarily on the primary screen.
sDockHiddenCount += aShouldHide ? 1 : -1;
NS_ASSERTION(sMenuBarHiddenCount >= 0, "Unbalanced HideMenuAndDockForWindow calls");
// Only hide the menu bar if the window is on the same screen.
// The menu bar is always on the first screen in the screen list.
if (aScreen == [[NSScreen screens] objectAtIndex:0]) {
sMenuBarHiddenCount += aShouldHide ? 1 : -1;
NS_ASSERTION(sDockHiddenCount >= 0, "Unbalanced HideMenuAndDockForWindow calls");
}
// TODO This should be upgraded to use [NSApplication setPresentationOptions:]
// when support for 10.5 is dropped.
if (sMenuBarHiddenCount > 0) {
::SetSystemUIMode(kUIModeAllHidden, 0);
} else if (sDockHiddenCount > 0) {
::SetSystemUIMode(kUIModeContentHidden, 0);
} else {
::SetSystemUIMode(kUIModeNormal, 0);
}
NS_OBJC_END_TRY_ABORT_BLOCK;
}
#define NS_APPSHELLSERVICE_CONTRACTID "@mozilla.org/appshell/appShellService;1"
nsIWidget* nsCocoaUtils::GetHiddenWindowWidget()
{
nsCOMPtr<nsIAppShellService> appShell(do_GetService(NS_APPSHELLSERVICE_CONTRACTID));
if (!appShell) {
NS_WARNING("Couldn't get AppShellService in order to get hidden window ref");
return nullptr;
}
nsCOMPtr<nsIXULWindow> hiddenWindow;
appShell->GetHiddenWindow(getter_AddRefs(hiddenWindow));
if (!hiddenWindow) {
// Don't warn, this happens during shutdown, bug 358607.
return nullptr;
}
nsCOMPtr<nsIBaseWindow> baseHiddenWindow;
baseHiddenWindow = do_GetInterface(hiddenWindow);
if (!baseHiddenWindow) {
NS_WARNING("Couldn't get nsIBaseWindow from hidden window (nsIXULWindow)");
return nullptr;
}
nsCOMPtr<nsIWidget> hiddenWindowWidget;
if (NS_FAILED(baseHiddenWindow->GetMainWidget(getter_AddRefs(hiddenWindowWidget)))) {
NS_WARNING("Couldn't get nsIWidget from hidden window (nsIBaseWindow)");
return nullptr;
}
return hiddenWindowWidget;
}
void nsCocoaUtils::PrepareForNativeAppModalDialog()
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
// Don't do anything if this is embedding. We'll assume that if there is no hidden
// window we shouldn't do anything, and that should cover the embedding case.
nsMenuBarX* hiddenWindowMenuBar = nsMenuUtilsX::GetHiddenWindowMenuBar();
if (!hiddenWindowMenuBar)
return;
// First put up the hidden window menu bar so that app menu event handling is correct.
hiddenWindowMenuBar->Paint();
NSMenu* mainMenu = [NSApp mainMenu];
NS_ASSERTION([mainMenu numberOfItems] > 0, "Main menu does not have any items, something is terribly wrong!");
// Create new menu bar for use with modal dialog
NSMenu* newMenuBar = [[NSMenu alloc] initWithTitle:@""];
// Swap in our app menu. Note that the event target is whatever window is up when
// the app modal dialog goes up.
NSMenuItem* firstMenuItem = [[mainMenu itemAtIndex:0] retain];
[mainMenu removeItemAtIndex:0];
[newMenuBar insertItem:firstMenuItem atIndex:0];
[firstMenuItem release];
// Add standard edit menu
[newMenuBar addItem:nsMenuUtilsX::GetStandardEditMenuItem()];
// Show the new menu bar
[NSApp setMainMenu:newMenuBar];
[newMenuBar release];
NS_OBJC_END_TRY_ABORT_BLOCK;
}
void nsCocoaUtils::CleanUpAfterNativeAppModalDialog()
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
// Don't do anything if this is embedding. We'll assume that if there is no hidden
// window we shouldn't do anything, and that should cover the embedding case.
nsMenuBarX* hiddenWindowMenuBar = nsMenuUtilsX::GetHiddenWindowMenuBar();
if (!hiddenWindowMenuBar)
return;
NSWindow* mainWindow = [NSApp mainWindow];
if (!mainWindow)
hiddenWindowMenuBar->Paint();
else
[WindowDelegate paintMenubarForWindow:mainWindow];
NS_OBJC_END_TRY_ABORT_BLOCK;
}
nsresult nsCocoaUtils::CreateCGImageFromSurface(gfxImageSurface *aFrame, CGImageRef *aResult)
{
int32_t width = aFrame->Width();
int32_t stride = aFrame->Stride();
int32_t height = aFrame->Height();
if ((stride % 4 != 0) || (height < 1) || (width < 1)) {
return NS_ERROR_FAILURE;
}
// Create a CGImageRef with the bits from the image, taking into account
// the alpha ordering and endianness of the machine so we don't have to
// touch the bits ourselves.
CGDataProviderRef dataProvider = ::CGDataProviderCreateWithData(NULL,
aFrame->Data(),
stride * height,
NULL);
CGColorSpaceRef colorSpace = ::CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
*aResult = ::CGImageCreate(width,
height,
8,
32,
stride,
colorSpace,
kCGBitmapByteOrder32Host | kCGImageAlphaFirst,
dataProvider,
NULL,
0,
kCGRenderingIntentDefault);
::CGColorSpaceRelease(colorSpace);
::CGDataProviderRelease(dataProvider);
return *aResult ? NS_OK : NS_ERROR_FAILURE;
}
nsresult nsCocoaUtils::CreateNSImageFromCGImage(CGImageRef aInputImage, NSImage **aResult)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
int32_t width = ::CGImageGetWidth(aInputImage);
int32_t height = ::CGImageGetHeight(aInputImage);
NSRect imageRect = ::NSMakeRect(0.0, 0.0, width, height);
// Create a new image to receive the Quartz image data.
*aResult = [[NSImage alloc] initWithSize:imageRect.size];
[*aResult lockFocus];
// Get the Quartz context and draw.
CGContextRef imageContext = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort];
::CGContextDrawImage(imageContext, *(CGRect*)&imageRect, aInputImage);
[*aResult unlockFocus];
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
nsresult nsCocoaUtils::CreateNSImageFromImageContainer(imgIContainer *aImage, uint32_t aWhichFrame, NSImage **aResult)
{
nsRefPtr<gfxASurface> surface;
aImage->GetFrame(aWhichFrame,
imgIContainer::FLAG_SYNC_DECODE,
getter_AddRefs(surface));
NS_ENSURE_TRUE(surface, NS_ERROR_FAILURE);
nsRefPtr<gfxImageSurface> frame(surface->GetAsReadableARGB32ImageSurface());
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
CGImageRef imageRef = NULL;
nsresult rv = nsCocoaUtils::CreateCGImageFromSurface(frame, &imageRef);
if (NS_FAILED(rv) || !imageRef) {
return NS_ERROR_FAILURE;
}
rv = nsCocoaUtils::CreateNSImageFromCGImage(imageRef, aResult);
if (NS_FAILED(rv) || !aResult) {
return NS_ERROR_FAILURE;
}
::CGImageRelease(imageRef);
return NS_OK;
}
// static
void
nsCocoaUtils::GetStringForNSString(const NSString *aSrc, nsAString& aDist)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
if (!aSrc) {
aDist.Truncate();
return;
}
aDist.SetLength([aSrc length]);
[aSrc getCharacters: aDist.BeginWriting()];
NS_OBJC_END_TRY_ABORT_BLOCK;
}
// static
NSString*
nsCocoaUtils::ToNSString(const nsAString& aString)
{
return [NSString stringWithCharacters:aString.BeginReading()
length:aString.Length()];
}
// static
void
nsCocoaUtils::GeckoRectToNSRect(const nsIntRect& aGeckoRect,
NSRect& aOutCocoaRect)
{
aOutCocoaRect.origin.x = aGeckoRect.x;
aOutCocoaRect.origin.y = aGeckoRect.y;
aOutCocoaRect.size.width = aGeckoRect.width;
aOutCocoaRect.size.height = aGeckoRect.height;
}
// static
void
nsCocoaUtils::NSRectToGeckoRect(const NSRect& aCocoaRect,
nsIntRect& aOutGeckoRect)
{
aOutGeckoRect.x = NSToIntRound(aCocoaRect.origin.x);
aOutGeckoRect.y = NSToIntRound(aCocoaRect.origin.y);
aOutGeckoRect.width = NSToIntRound(aCocoaRect.origin.x + aCocoaRect.size.width) - aOutGeckoRect.x;
aOutGeckoRect.height = NSToIntRound(aCocoaRect.origin.y + aCocoaRect.size.height) - aOutGeckoRect.y;
}
// static
NSEvent*
nsCocoaUtils::MakeNewCocoaEventWithType(NSEventType aEventType, NSEvent *aEvent)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
NSEvent* newEvent =
[NSEvent keyEventWithType:aEventType
location:[aEvent locationInWindow]
modifierFlags:[aEvent modifierFlags]
timestamp:[aEvent timestamp]
windowNumber:[aEvent windowNumber]
context:[aEvent context]
characters:[aEvent characters]
charactersIgnoringModifiers:[aEvent charactersIgnoringModifiers]
isARepeat:[aEvent isARepeat]
keyCode:[aEvent keyCode]];
return newEvent;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
// static
void
nsCocoaUtils::InitNPCocoaEvent(NPCocoaEvent* aNPCocoaEvent)
{
memset(aNPCocoaEvent, 0, sizeof(NPCocoaEvent));
}
// static
void
nsCocoaUtils::InitPluginEvent(nsPluginEvent &aPluginEvent,
NPCocoaEvent &aCocoaEvent)
{
aPluginEvent.time = PR_IntervalNow();
aPluginEvent.pluginEvent = (void*)&aCocoaEvent;
aPluginEvent.retargetToFocusedDocument = false;
}
// static
void
nsCocoaUtils::InitInputEvent(nsInputEvent &aInputEvent,
NSEvent* aNativeEvent)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
NSUInteger modifiers =
aNativeEvent ? [aNativeEvent modifierFlags] : [NSEvent modifierFlags];
InitInputEvent(aInputEvent, modifiers);
aInputEvent.time = PR_IntervalNow();
NS_OBJC_END_TRY_ABORT_BLOCK;
}
// static
void
nsCocoaUtils::InitInputEvent(nsInputEvent &aInputEvent,
NSUInteger aModifiers)
{
aInputEvent.modifiers = 0;
if (aModifiers & NSShiftKeyMask) {
aInputEvent.modifiers |= MODIFIER_SHIFT;
}
if (aModifiers & NSControlKeyMask) {
aInputEvent.modifiers |= MODIFIER_CONTROL;
}
if (aModifiers & NSAlternateKeyMask) {
aInputEvent.modifiers |= MODIFIER_ALT;
// Mac's option key is similar to other platforms' AltGr key.
// Let's set AltGr flag when option key is pressed for consistency with
// other platforms.
aInputEvent.modifiers |= MODIFIER_ALTGRAPH;
}
if (aModifiers & NSCommandKeyMask) {
aInputEvent.modifiers |= MODIFIER_META;
}
if (aModifiers & NSAlphaShiftKeyMask) {
aInputEvent.modifiers |= MODIFIER_CAPSLOCK;
}
// Mac doesn't have NumLock key. We can assume that NumLock is always locked
// if user is using a keyboard which has numpad. Otherwise, if user is using
// a keyboard which doesn't have numpad, e.g., MacBook's keyboard, we can
// assume that NumLock is always unlocked.
// Unfortunately, we cannot know whether current keyboard has numpad or not.
// We should notify locked state only when keys in numpad are pressed.
// By this, web applications may not be confused by unexpected numpad key's
// key event with unlocked state.
if (aModifiers & NSNumericPadKeyMask) {
aInputEvent.modifiers |= MODIFIER_NUMLOCK;
}
// Be aware, NSFunctionKeyMask is included when arrow keys, home key or some
// other keys are pressed. We cannot check whether 'fn' key is pressed or
// not by the flag.
}
// static
UInt32
nsCocoaUtils::ConvertToCarbonModifier(NSUInteger aCocoaModifier)
{
UInt32 carbonModifier = 0;
if (aCocoaModifier & NSAlphaShiftKeyMask) {
carbonModifier |= alphaLock;
}
if (aCocoaModifier & NSControlKeyMask) {
carbonModifier |= controlKey;
}
if (aCocoaModifier & NSAlternateKeyMask) {
carbonModifier |= optionKey;
}
if (aCocoaModifier & NSShiftKeyMask) {
carbonModifier |= shiftKey;
}
if (aCocoaModifier & NSCommandKeyMask) {
carbonModifier |= cmdKey;
}
if (aCocoaModifier & NSNumericPadKeyMask) {
carbonModifier |= kEventKeyModifierNumLockMask;
}
if (aCocoaModifier & NSFunctionKeyMask) {
carbonModifier |= kEventKeyModifierFnMask;
}
return carbonModifier;
}
// While HiDPI support is not 100% complete and tested, we'll have a pref
// to allow it to be turned off in case of problems (or for testing purposes).
// gfx.hidpi.enabled is an integer with the meaning:
// <= 0 : HiDPI support is disabled
// 1 : HiDPI enabled provided all screens have the same backing resolution
// > 1 : HiDPI enabled even if there are a mixture of screen modes
// All the following code is to be removed once HiDPI work is more complete.
static bool sHiDPIEnabled = false;
static bool sHiDPIPrefInitialized = false;
// static
bool
nsCocoaUtils::HiDPIEnabled()
{
if (!sHiDPIPrefInitialized) {
sHiDPIPrefInitialized = true;
int prefSetting = Preferences::GetInt("gfx.hidpi.enabled", 1);
if (prefSetting <= 0) {
return false;
}
// prefSetting is at least 1, need to check attached screens...
int scaleFactors = 0; // used as a bitset to track the screen types found
NSEnumerator *screenEnum = [[NSScreen screens] objectEnumerator];
while (NSScreen *screen = [screenEnum nextObject]) {
NSDictionary *desc = [screen deviceDescription];
if ([desc objectForKey:NSDeviceIsScreen] == nil) {
continue;
}
CGFloat scale =
[screen respondsToSelector:@selector(backingScaleFactor)] ?
[screen backingScaleFactor] : 1.0;
// Currently, we only care about differentiating "1.0" and "2.0",
// so we set one of the two low bits to record which.
if (scale > 1.0) {
scaleFactors |= 2;
} else {
scaleFactors |= 1;
}
}
// Now scaleFactors will be:
// 0 if no screens (supporting backingScaleFactor) found
// 1 if only lo-DPI screens
// 2 if only hi-DPI screens
// 3 if both lo- and hi-DPI screens
// We'll enable HiDPI support if there's only a single screen type,
// OR if the pref setting is explicitly greater than 1.
sHiDPIEnabled = (scaleFactors <= 2) || (prefSetting > 1);
}
return sHiDPIEnabled;
}