Implement IME for Mac plugins using the Cocoa event model on 10.6

Based on the implementation of Gecko's Cocoa event model IME handling on 64-bit, but modified to fit Chrome's cross-process event handling.

Because NSTextInputContext is 10.6+, 10.5 will need a cempletely different implementation.

BUG=30905
TEST=Plugins implementing the updated NPAPI Cocoa IME spec should handle IME on 10.6.

Review URL: http://codereview.chromium.org/3808001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@62820 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 143 insertions, 0 deletions

diff --git a/third_party/mozilla/ComplexTextInputPanel.mm b/third_party/mozilla/ComplexTextInputPanel.mm
new file mode 100644
index 0000000..638ed9d
--- /dev/null
+++ b/third_party/mozilla/ComplexTextInputPanel.mm
@@ -0,0 +1,143 @@
+/*
+ * 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"
+
+#if MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_5
+@interface NSView (SnowLeopardMethods)
+- (NSTextInputContext *)inputContext;
+@end
+
+// This is actually an NSTextInputContext method, but we can't declare
+// that since the whole class is 10.6+.
+@interface NSObject (SnowLeopardMethods)
+- (BOOL)handleEvent:(NSEvent *)theEvent;
+@end
+
+static NSString* const NSTextInputContextKeyboardSelectionDidChangeNotification =
+    @"NSTextInputContextKeyboardSelectionDidChangeNotification";
+#endif
+
+#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
+{
+  [mInputTextView setString:@""];
+  [self orderOut:nil];
+}
+
+- (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;
+}
+
+- (void)cancelInput
+{
+  [self orderOut:nil];
+  [mInputTextView setString:@""];
+}
+
+- (NSTextInputContext*)inputContext
+{
+  return [mInputTextView inputContext];
+}
+
+@end