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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"

 #include <algorithm>

 #include "mozilla/Preferences.h"

 #include "nsChildView.h"

 #include "nsCocoaFeatures.h"

 using namespace mozilla;

 #define kInputWindowHeight 20

 @implementation ComplexTextInputPanel

 + (ComplexTextInputPanel*)sharedComplexTextInputPanel

 {

   static ComplexTextInputPanel *sComplexTextInputPanel;

   if (!sComplexTextInputPanel)

     sComplexTextInputPanel = [[ComplexTextInputPanel alloc] init];

   return sComplexTextInputPanel;

 }

 - (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];

   }

 }

 - (BOOL)interpretKeyEvent:(NSEvent*)event string:(NSString**)string

 {

   BOOL hadMarkedText = [mInputTextView hasMarkedText];

   *string = nil;

   if (![[mInputTextView inputContext] handleEvent:event])

     return NO;

   if ([mInputTextView hasMarkedText]) {

     // Don't show the input method window for dead keys

     if ([[event characters] length] > 0)

       [self orderFront:nil];

     return YES;

   } else {

     [self orderOut:nil];

     NSString *text = [[mInputTextView textStorage] string];

     if ([text length] > 0)

       *string = [[text copy] autorelease];

   }

   [mInputTextView setString:@""];

   return hadMarkedText;

 }

 - (NSTextInputContext*)inputContext

 {

   return [mInputTextView inputContext];

 }

 - (void)cancelComposition

 {

   [mInputTextView setString:@""];

   [self orderOut:nil];

 }

 - (BOOL)inComposition

 {

   return [mInputTextView hasMarkedText];

 }

 - (void)adjustTo:(NSView*)view

 {

   NSRect viewRect = [view frame];

   viewRect.origin.x = 0;

   viewRect.origin.y = 0;

   viewRect = [view convertRect:viewRect toView:nil];

   if (nsCocoaFeatures::OnLionOrLater()) {

     viewRect = [[view window] convertRectToScreen:viewRect];

   } else {

     viewRect.origin = [[view window] convertBaseToScreen:viewRect.origin];

   }

   NSRect selfRect = [self frame];

   CGFloat minWidth = static_cast<CGFloat>(

                        Preferences::GetUint("ui.plugin.panel.min-width", 500));

   NSRect rect = NSMakeRect(viewRect.origin.x,

                            viewRect.origin.y - selfRect.size.height,

                            std::max(viewRect.size.width, minWidth),

                            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