gecko-dev/dom/plugins/ipc/PluginUtilsOSX.mm

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  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  * Contributor(s):
  *   Benoit Girard <b56girard@gmail.com>
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#import <AppKit/AppKit.h>
#import <QuartzCore/QuartzCore.h>
#include "PluginUtilsOSX.h"

// Remove definitions for try/catch interfering with ObjCException macros.
#include "nsObjCExceptions.h"

using namespace mozilla::plugins::PluginUtilsOSX;

@interface CGBridgeLayer : CALayer {
  DrawPluginFunc mDrawFunc;
  void* mPluginInstance;
  nsIntRect mUpdateRect;
}
- (void) setDrawFunc: (DrawPluginFunc)aFunc pluginInstance:(void*) aPluginInstance;
- (void) updateRect: (nsIntRect)aRect;

@end

@implementation CGBridgeLayer
- (void) updateRect: (nsIntRect)aRect
{
   mUpdateRect.UnionRect(mUpdateRect, aRect);
}

- (void) setDrawFunc: (DrawPluginFunc)aFunc pluginInstance:(void*) aPluginInstance
{
  mDrawFunc = aFunc;
  mPluginInstance = aPluginInstance;
}

- (void)drawInContext:(CGContextRef)aCGContext

{
  ::CGContextSaveGState(aCGContext); 
  ::CGContextTranslateCTM(aCGContext, 0, self.bounds.size.height);
  ::CGContextScaleCTM(aCGContext, (CGFloat) 1, (CGFloat) -1);

  mDrawFunc(aCGContext, mPluginInstance, mUpdateRect);

  ::CGContextRestoreGState(aCGContext); 

  mUpdateRect.SetEmpty();
}

@end

void* mozilla::plugins::PluginUtilsOSX::GetCGLayer(DrawPluginFunc aFunc, void* aPluginInstance) {
  CGBridgeLayer *bridgeLayer = [[CGBridgeLayer alloc] init ];
  [bridgeLayer setDrawFunc:aFunc pluginInstance:aPluginInstance];
  return bridgeLayer;
}

void mozilla::plugins::PluginUtilsOSX::ReleaseCGLayer(void *cgLayer) {
  CGBridgeLayer *bridgeLayer = (CGBridgeLayer*)cgLayer;
  [bridgeLayer release];
}

void mozilla::plugins::PluginUtilsOSX::Repaint(void *caLayer, nsIntRect aRect) {
  CGBridgeLayer *bridgeLayer = (CGBridgeLayer*)caLayer;
  [bridgeLayer updateRect:aRect];
  [bridgeLayer setNeedsDisplay];
}

@interface EventProcessor : NSObject {
  RemoteProcessEvents   aRemoteEvents;
  void                 *aPluginModule;
}
- (void)setRemoteEvents:(RemoteProcessEvents) remoteEvents pluginModule:(void*) pluginModule;
- (void)onTick;
@end

@implementation EventProcessor
- (void) onTick
{
    aRemoteEvents(aPluginModule);
}

- (void)setRemoteEvents:(RemoteProcessEvents) remoteEvents pluginModule:(void*) pluginModule
{
    aRemoteEvents = remoteEvents;
    aPluginModule = pluginModule;
}
@end

#define EVENT_PROCESS_DELAY 0.05 // 50 ms

NPError mozilla::plugins::PluginUtilsOSX::ShowCocoaContextMenu(void* aMenu, int aX, int aY, void* pluginModule, RemoteProcessEvents remoteEvent) 
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;

  // Set the native cursor to the OS default (an arrow) before displaying the
  // context menu.  Otherwise (if the plugin has changed the cursor) it may
  // stay as the plugin has set it -- which means it may be invisible.  We
  // need to do this because we display the context menu without making the
  // plugin process the foreground process.  If we did, the cursor would
  // change to an arrow cursor automatically -- as it does in Chrome.
  [[NSCursor arrowCursor] set];

  // Create a timer to process browser events while waiting
  // on the menu. This prevents the browser from hanging
  // during the lifetime of the menu.
  EventProcessor* eventProcessor = [[EventProcessor alloc] init];
  [eventProcessor setRemoteEvents:remoteEvent pluginModule:pluginModule];
  NSTimer *eventTimer = [NSTimer timerWithTimeInterval:EVENT_PROCESS_DELAY
                             target:eventProcessor selector:@selector(onTick) 
                             userInfo:nil repeats:TRUE];
  // Use NSEventTrackingRunLoopMode otherwise the timer will
  // not fire during the right click menu.
  [[NSRunLoop currentRunLoop] addTimer:eventTimer 
                              forMode:NSEventTrackingRunLoopMode];

  NSMenu* nsmenu = reinterpret_cast<NSMenu*>(aMenu);
  NSPoint screen_point = ::NSMakePoint(aX, aY);

  [nsmenu popUpMenuPositioningItem:nil atLocation:screen_point inView:nil];

  [eventTimer invalidate];
  [eventProcessor release];

  return NPERR_NO_ERROR;

  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NPERR_GENERIC_ERROR);
}

void mozilla::plugins::PluginUtilsOSX::InvokeNativeEventLoop()
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
  ::CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.0, true);
  NS_OBJC_END_TRY_ABORT_BLOCK;
}