gecko-dev/widget/cocoa/ComplexTextInputPanel.mm

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/*
* Copyright (C) 2009 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Modified by Josh Aas of Mozilla Corporation.
*/
#import "ComplexTextInputPanel.h"
#import <Cocoa/Cocoa.h>
#include <algorithm>
#include "mozilla/Preferences.h"
#include "nsChildView.h"
#include "nsCocoaFeatures.h"
using namespace mozilla;
extern "C" OSStatus TSMProcessRawKeyEvent(EventRef anEvent);
#define kInputWindowHeight 20
@interface ComplexTextInputPanelImpl : NSPanel {
NSTextView *mInputTextView;
}
+ (ComplexTextInputPanelImpl*)sharedComplexTextInputPanelImpl;
- (NSTextInputContext*)inputContext;
- (void)interpretKeyEvent:(NSEvent*)event string:(NSString**)string;
- (void)cancelComposition;
- (BOOL)inComposition;
// This places the text input panel fully onscreen and below the lower left
// corner of the focused plugin.
- (void)adjustTo:(NSPoint)point;
@end
@implementation ComplexTextInputPanelImpl
+ (ComplexTextInputPanelImpl*)sharedComplexTextInputPanelImpl
{
static ComplexTextInputPanelImpl *sComplexTextInputPanelImpl;
if (!sComplexTextInputPanelImpl)
sComplexTextInputPanelImpl = [[ComplexTextInputPanelImpl alloc] init];
return sComplexTextInputPanelImpl;
}
- (id)init
{
// In the original Apple code the style mask is given by a function which is not open source.
// What could possibly be worth hiding in that function, I do not know.
// Courtesy of gdb: stylemask: 011000011111, 0x61f
self = [super initWithContentRect:NSZeroRect styleMask:0x61f backing:NSBackingStoreBuffered defer:YES];
if (!self)
return nil;
// Set the frame size.
NSRect visibleFrame = [[NSScreen mainScreen] visibleFrame];
NSRect frame = NSMakeRect(visibleFrame.origin.x, visibleFrame.origin.y, visibleFrame.size.width, kInputWindowHeight);
[self setFrame:frame display:NO];
mInputTextView = [[NSTextView alloc] initWithFrame:[self.contentView frame]];
mInputTextView.autoresizingMask = NSViewWidthSizable | NSViewHeightSizable | NSViewMaxXMargin | NSViewMinXMargin | NSViewMaxYMargin | NSViewMinYMargin;
NSScrollView* scrollView = [[NSScrollView alloc] initWithFrame:[self.contentView frame]];
scrollView.documentView = mInputTextView;
self.contentView = scrollView;
[scrollView release];
[self setFloatingPanel:YES];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardInputSourceChanged:)
name:NSTextInputContextKeyboardSelectionDidChangeNotification
object:nil];
return self;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[mInputTextView release];
[super dealloc];
}
- (void)keyboardInputSourceChanged:(NSNotification *)notification
{
static int8_t sDoCancel = -1;
if (!sDoCancel || ![self inComposition]) {
return;
}
if (sDoCancel < 0) {
bool cancelComposition = false;
static const char* kPrefName =
"ui.plugin.cancel_composition_at_input_source_changed";
nsresult rv = Preferences::GetBool(kPrefName, &cancelComposition);
NS_ENSURE_SUCCESS(rv, );
sDoCancel = cancelComposition ? 1 : 0;
}
if (sDoCancel) {
[self cancelComposition];
}
}
- (void)interpretKeyEvent:(NSEvent*)event string:(NSString**)string
{
*string = nil;
if (![[mInputTextView inputContext] handleEvent:event]) {
return;
}
if ([mInputTextView hasMarkedText]) {
// Don't show the input method window for dead keys
if ([[event characters] length] > 0) {
[self orderFront:nil];
}
return;
} else {
[self orderOut:nil];
NSString *text = [[mInputTextView textStorage] string];
if ([text length] > 0) {
*string = [[text copy] autorelease];
}
}
[mInputTextView setString:@""];
}
- (NSTextInputContext*)inputContext
{
return [mInputTextView inputContext];
}
- (void)cancelComposition
{
[mInputTextView setString:@""];
[self orderOut:nil];
}
- (BOOL)inComposition
{
return [mInputTextView hasMarkedText];
}
- (void)adjustTo:(NSPoint)point
{
NSRect selfRect = [self frame];
NSRect rect = NSMakeRect(point.x,
point.y - selfRect.size.height,
500,
selfRect.size.height);
// Adjust to screen.
NSRect screenRect = [[NSScreen mainScreen] visibleFrame];
if (rect.origin.x < screenRect.origin.x) {
rect.origin.x = screenRect.origin.x;
}
if (rect.origin.y < screenRect.origin.y) {
rect.origin.y = screenRect.origin.y;
}
CGFloat xMostOfScreen = screenRect.origin.x + screenRect.size.width;
CGFloat yMostOfScreen = screenRect.origin.y + screenRect.size.height;
CGFloat xMost = rect.origin.x + rect.size.width;
CGFloat yMost = rect.origin.y + rect.size.height;
if (xMostOfScreen < xMost) {
rect.origin.x -= xMost - xMostOfScreen;
}
if (yMostOfScreen < yMost) {
rect.origin.y -= yMost - yMostOfScreen;
}
[self setFrame:rect display:[self isVisible]];
}
@end
class ComplexTextInputPanelPrivate : public ComplexTextInputPanel
{
public:
ComplexTextInputPanelPrivate();
virtual void InterpretKeyEvent(void* aEvent, nsAString& aOutText);
virtual bool IsInComposition();
virtual void PlacePanel(int32_t x, int32_t y);
virtual void* GetInputContext() { return [mPanel inputContext]; }
virtual void CancelComposition() { [mPanel cancelComposition]; }
private:
~ComplexTextInputPanelPrivate();
ComplexTextInputPanelImpl* mPanel;
};
ComplexTextInputPanelPrivate::ComplexTextInputPanelPrivate()
{
mPanel = [[ComplexTextInputPanelImpl alloc] init];
}
ComplexTextInputPanelPrivate::~ComplexTextInputPanelPrivate()
{
[mPanel release];
}
ComplexTextInputPanel*
ComplexTextInputPanel::GetSharedComplexTextInputPanel()
{
static ComplexTextInputPanelPrivate *sComplexTextInputPanelPrivate;
if (!sComplexTextInputPanelPrivate) {
sComplexTextInputPanelPrivate = new ComplexTextInputPanelPrivate();
}
return sComplexTextInputPanelPrivate;
}
void
ComplexTextInputPanelPrivate::InterpretKeyEvent(void* aEvent, nsAString& aOutText)
{
NSString* textString = nil;
[mPanel interpretKeyEvent:(NSEvent*)aEvent string:&textString];
if (textString) {
nsCocoaUtils::GetStringForNSString(textString, aOutText);
}
}
bool
ComplexTextInputPanelPrivate::IsInComposition()
{
return !![mPanel inComposition];
}
void
ComplexTextInputPanelPrivate::PlacePanel(int32_t x, int32_t y)
{
[mPanel adjustTo:NSMakePoint(x, y)];
}