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// Copyright (c) 2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import <Cocoa/Cocoa.h>
#import "libcef/browser_webview_mac.h"
#import "libcef/browser_impl.h"
#import "libcef/cef_context.h"
#import "libcef/web_drag_source_mac.h"
#import "libcef/web_drop_target_mac.h"
#import "libcef/webwidget_host.h"
#import "base/memory/scoped_ptr.h"
#import "base/string_util.h"
#import "base/strings/sys_string_conversions.h"
#import "third_party/WebKit/Source/WebKit/chromium/public/mac/WebInputEventFactory.h"
#import "third_party/WebKit/Source/WebKit/chromium/public/mac/WebSubstringUtil.h"
#import "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#import "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#import "third_party/mozilla/NSPasteboard+Utils.h"
#import "third_party/skia/include/core/SkRegion.h"
#import "ui/gfx/rect.h"
using WebKit::WebColor;
using WebKit::WebCompositionUnderline;
using WebKit::WebInputEvent;
using WebKit::WebInputEventFactory;
using WebKit::WebKeyboardEvent;
using WebKit::WebPoint;
using WebKit::WebRect;
using WebKit::WebString;
using WebKit::WebSubstringUtil;
// This code is copied from
// content/browser/renderer_host/render_widget_host_mac
namespace {
WebColor WebColorFromNSColor(NSColor *color) {
CGFloat r, g, b, a;
[color getRed:&r green:&g blue:&b alpha:&a];
return
std::max(0, std::min(static_cast<int>(lroundf(255.0f * a)), 255)) << 24 |
std::max(0, std::min(static_cast<int>(lroundf(255.0f * r)), 255)) << 16 |
std::max(0, std::min(static_cast<int>(lroundf(255.0f * g)), 255)) << 8 |
std::max(0, std::min(static_cast<int>(lroundf(255.0f * b)), 255));
}
// Extract underline information from an attributed string. Mostly copied from
// third_party/WebKit/Source/WebKit/mac/WebView/WebHTMLView.mm
void ExtractUnderlines(
NSAttributedString* string,
std::vector<WebCompositionUnderline>* underlines) {
int length = [[string string] length];
int i = 0;
while (i < length) {
NSRange range;
NSDictionary* attrs = [string attributesAtIndex:i
longestEffectiveRange:&range
inRange:NSMakeRange(i, length - i)];
if (NSNumber *style = [attrs objectForKey:NSUnderlineStyleAttributeName]) {
WebColor color = SK_ColorBLACK;
if (NSColor *colorAttr =
[attrs objectForKey:NSUnderlineColorAttributeName]) {
color = WebColorFromNSColor(
[colorAttr colorUsingColorSpaceName:NSDeviceRGBColorSpace]);
}
underlines->push_back(WebCompositionUnderline(
range.location, NSMaxRange(range), color, [style intValue] > 1));
}
i = range.location + range.length;
}
}
} // namespace
@implementation BrowserWebView
@synthesize browser = browser_;
@synthesize in_setfocus = is_in_setfocus_;
- (id)initWithFrame:(NSRect)frame {
self = [super initWithFrame:frame];
if (self) {
trackingArea_ =
[[NSTrackingArea alloc] initWithRect:frame
options:NSTrackingMouseMoved |
NSTrackingMouseEnteredAndExited |
NSTrackingActiveInActiveApp |
NSTrackingInVisibleRect
owner:self
userInfo:nil];
[self addTrackingArea:trackingArea_];
}
return self;
}
- (void) dealloc {
if (browser_)
browser_->UIT_DestroyBrowser();
[self removeTrackingArea:trackingArea_];
[trackingArea_ release];
[super dealloc];
}
- (void)drawRect:(NSRect)rect {
#ifndef NDEBUG
CGContextRef context = reinterpret_cast<CGContextRef>(
[[NSGraphicsContext currentContext] graphicsPort]);
CGContextSetRGBFillColor(context, 1, 0, 1, 1);
CGContextFillRect(context, NSRectToCGRect(rect));
#endif
if (browser_ && browser_->UIT_GetWebView()) {
NSInteger count;
const NSRect *rects;
[self getRectsBeingDrawn:&rects count:&count];
SkRegion update_rgn;
for (int i = 0; i < count; i++) {
const NSRect r = rects[i];
const float min_x = NSMinX(r);
const float max_x = NSMaxX(r);
const float min_y = NSHeight([self bounds]) - NSMaxY(r);
const float max_y = NSHeight([self bounds]) - NSMinY(r);
update_rgn.op(min_x, min_y, max_x, max_y, SkRegion::kUnion_Op);
}
browser_->UIT_GetWebViewHost()->Paint(update_rgn);
}
}
- (void)mouseDown:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)rightMouseDown:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)otherMouseDown:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)mouseUp:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)rightMouseUp:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)otherMouseUp:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)mouseMoved:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)mouseDragged:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)scrollWheel:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->WheelEvent(theEvent);
}
- (void)rightMouseDragged:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)otherMouseDragged:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)mouseEntered:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
- (void)mouseExited:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->MouseEvent(theEvent);
}
// This code is mostly copied and adapted from
// content/browser/renderer_host/render_widget_host_mac
- (void)keyDown:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->KeyEvent(theEvent);
// Records the current marked text state, so that we can know if the marked
// text was deleted or not after handling the key down event.
BOOL oldHasMarkedText = hasMarkedText_;
// We check if the marked text has one or less characters and a delete key is
// pressed. In such cases, we want to cancel IME composition and delete the
// marked character, so we dispatch the event directly to WebKit.
if (hasMarkedText_ && underlines_.size() <= 1) {
// Check for backspace or delete.
if ([theEvent keyCode] == 0x33 || [theEvent keyCode] == 0x75)
[self forwardKeyEventToEditor: theEvent];
}
textToBeInserted_.clear();
markedText_.clear();
underlines_.clear();
unmarkTextCalled_ = NO;
handlingKeyDown_ = YES;
[self interpretKeyEvents:[NSArray arrayWithObject:theEvent]];
handlingKeyDown_ = NO;
// Only send a corresponding key press event if there is no marked text.
// We also handle keys like backspace or delete, where the length
// of the text to be inserted is 0.
if (!hasMarkedText_ && !oldHasMarkedText &&
!textToBeInserted_.length() <= 1) {
if (textToBeInserted_.length() == 1) {
// If a single character was inserted, then we just send it as a keypress
// event.
WebKeyboardEvent keyboard_event(
WebInputEventFactory::keyboardEvent(theEvent));
keyboard_event.type = WebInputEvent::Char;
keyboard_event.text[0] = textToBeInserted_[0];
keyboard_event.text[1] = 0;
browser_->UIT_GetWebView()->handleInputEvent(keyboard_event);
} else {
[self forwardKeyEventToEditor: theEvent];
}
}
// Calling KeyEvent() could have destroyed the widget.
// We perform a sanity check and return if the widget is NULL.
if (!browser_ || !browser_->UIT_GetWebView())
return;
BOOL textInserted = NO;
if (textToBeInserted_.length() >
((hasMarkedText_ || oldHasMarkedText) ? 0u : 1u)) {
browser_->UIT_GetWebView()->confirmComposition(textToBeInserted_);
textInserted = YES;
}
if (hasMarkedText_ && markedText_.length()) {
browser_->UIT_GetWebView()->setComposition(markedText_, underlines_,
selectedRange_.location,
NSMaxRange(selectedRange_));
} else if (oldHasMarkedText && !hasMarkedText_ && !textInserted) {
if (unmarkTextCalled_) {
browser_->UIT_GetWebView()->confirmComposition();
} else {
// Simulating a cancelComposition
browser_->UIT_GetWebView()->setComposition(EmptyString16(), underlines_,
0, 0);
}
}
}
- (void)forwardKeyEventToEditor: (NSEvent *)theEvent {
if ([theEvent type] != NSKeyDown)
return;
if ([theEvent modifierFlags] & (NSNumericPadKeyMask | NSFunctionKeyMask)) {
// Don't send a Char event for non-char keys like arrows, function keys and
// clear.
switch ([theEvent keyCode]) {
case 81: // =
case 75: // /
case 67: // *
case 78: // -
case 69: // +
case 76: // Enter
case 65: // .
case 82: // 0
case 83: // 1
case 84: // 2
case 85: // 3
case 86: // 4
case 87: // 5
case 88: // 6
case 89: // 7
case 91: // 8
case 92: // 9
break;
default:
return;
}
}
if (browser_ && browser_->UIT_GetWebView()) {
WebKeyboardEvent keyboard_event(
WebInputEventFactory::keyboardEvent(theEvent));
keyboard_event.type = WebInputEvent::Char;
browser_->UIT_GetWebViewHost()->SetLastKeyEvent(keyboard_event);
browser_->UIT_GetWebView()->handleInputEvent(keyboard_event);
}
}
- (void)keyUp:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->KeyEvent(theEvent);
}
- (void)flagsChanged:(NSEvent *)theEvent {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebViewHost()->KeyEvent(theEvent);
}
- (BOOL)isOpaque {
return YES;
}
- (BOOL)canBecomeKeyView {
return browser_ && browser_->UIT_GetWebView();
}
- (BOOL)acceptsFirstResponder {
return browser_ && browser_->UIT_GetWebView();
}
- (BOOL)becomeFirstResponder {
if (browser_ && browser_->UIT_GetWebView()) {
if (!is_in_setfocus_) {
CefRefPtr<CefClient> client = browser_->GetClient();
if (client.get()) {
CefRefPtr<CefFocusHandler> handler = client->GetFocusHandler();
if (handler.get() &&
handler->OnSetFocus(browser_, FOCUS_SOURCE_SYSTEM)) {
return NO;
}
}
}
browser_->UIT_GetWebViewHost()->SetFocus(YES);
return [super becomeFirstResponder];
}
return NO;
}
- (BOOL)resignFirstResponder {
if (browser_ && browser_->UIT_GetWebView()) {
browser_->UIT_GetWebViewHost()->SetFocus(NO);
return [super resignFirstResponder];
}
return NO;
}
- (void)setFrame:(NSRect)frameRect {
[super setFrame:frameRect];
if (browser_ && browser_->UIT_GetWebView()) {
const NSRect bounds = [self bounds];
browser_->UIT_GetWebViewHost()->SetSize(bounds.size.width,
bounds.size.height);
}
}
- (void)undo:(id)sender {
if (browser_)
browser_->GetFocusedFrame()->Undo();
}
- (void)redo:(id)sender {
if (browser_)
browser_->GetFocusedFrame()->Redo();
}
- (void)cut:(id)sender {
if (browser_)
browser_->GetFocusedFrame()->Cut();
}
- (void)copy:(id)sender {
if (browser_)
browser_->GetFocusedFrame()->Copy();
}
- (void)paste:(id)sender {
if (browser_)
browser_->GetFocusedFrame()->Paste();
}
- (void)delete:(id)sender {
if (browser_)
browser_->GetFocusedFrame()->Delete();
}
- (void)selectAll:(id)sender {
if (browser_)
browser_->GetFocusedFrame()->SelectAll();
}
- (void)registerDragDrop {
dropTarget_.reset([[WebDropTarget alloc] initWithWebView:self]);
// Register the view to handle the appropriate drag types.
NSArray* types = [NSArray arrayWithObjects:NSStringPboardType,
NSHTMLPboardType, NSURLPboardType, nil];
[self registerForDraggedTypes:types];
}
- (void)startDragWithDropData:(const WebDropData&)dropData
dragOperationMask:(NSDragOperation)operationMask
image:(NSImage*)image
offset:(NSPoint)offset {
dragSource_.reset([[WebDragSource alloc]
initWithWebView:self
dropData:&dropData
image:image
offset:offset
pasteboard:[NSPasteboard pasteboardWithName:NSDragPboard]
dragOperationMask:operationMask]);
[dragSource_ startDrag];
}
// NSPasteboardOwner methods
- (void)pasteboard:(NSPasteboard*)sender provideDataForType:(NSString*)type {
[dragSource_ lazyWriteToPasteboard:sender
forType:type];
}
// NSDraggingSource methods
// Returns what kind of drag operations are available. This is a required
// method for NSDraggingSource.
- (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal {
if (dragSource_.get())
return [dragSource_ draggingSourceOperationMaskForLocal:isLocal];
// No web drag source - this is the case for dragging a file from the
// downloads manager. Default to copy operation. Note: It is desirable to
// allow the user to either move or copy, but this requires additional
// plumbing to update the download item's path once its moved.
return NSDragOperationCopy;
}
// Called when a drag initiated in our view ends.
- (void)draggedImage:(NSImage*)anImage
endedAt:(NSPoint)screenPoint
operation:(NSDragOperation)operation {
[dragSource_ endDragAt:screenPoint operation:operation];
// Might as well throw out this object now.
dragSource_.reset();
}
// Called when a drag initiated in our view moves.
- (void)draggedImage:(NSImage*)draggedImage movedTo:(NSPoint)screenPoint {
[dragSource_ moveDragTo:screenPoint];
}
// Called when we're informed where a file should be dropped.
- (NSArray*)namesOfPromisedFilesDroppedAtDestination:(NSURL*)dropDest {
if (![dropDest isFileURL])
return nil;
NSString* file_name = [dragSource_ dragPromisedFileTo:[dropDest path]];
if (!file_name)
return nil;
return [NSArray arrayWithObject:file_name];
}
// NSDraggingDestination methods
- (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender {
return [dropTarget_ draggingEntered:sender view:self];
}
- (void)draggingExited:(id<NSDraggingInfo>)sender {
[dropTarget_ draggingExited:sender];
}
- (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender {
return [dropTarget_ draggingUpdated:sender view:self];
}
- (BOOL)performDragOperation:(id<NSDraggingInfo>)sender {
return [dropTarget_ performDragOperation:sender view:self];
}
// NSTextInputClient methods
// This code is mostly copied and adapted from
// content/browser/renderer_host/render_widget_host_mac
extern "C" {
extern NSString *NSTextInputReplacementRangeAttributeName;
}
- (NSArray *)validAttributesForMarkedText {
if (!validAttributesForMarkedText_) {
validAttributesForMarkedText_.reset([[NSArray alloc] initWithObjects:
NSUnderlineStyleAttributeName,
NSUnderlineColorAttributeName,
NSMarkedClauseSegmentAttributeName,
NSTextInputReplacementRangeAttributeName,
nil]);
}
return validAttributesForMarkedText_.get();
}
- (NSUInteger)characterIndexForPoint:(NSPoint)thePoint {
DCHECK([self window]);
// |thePoint| is in screen coordinates, but needs to be converted to WebKit
// coordinates (upper left origin). Scroll offsets will be taken care of in
// the renderer.
thePoint = [[self window] convertScreenToBase:thePoint];
thePoint = [self convertPoint:thePoint fromView:nil];
thePoint.y = NSHeight([self frame]) - thePoint.y;
WebPoint point(thePoint.x, thePoint.y);
return (NSUInteger)browser_->UIT_GetWebView()->focusedFrame()->
characterIndexForPoint(point);
}
- (NSRect)firstRectForCharacterRange:(NSRange)theRange
actualRange:(NSRangePointer) actualRange {
if (actualRange)
*actualRange = theRange;
if (!browser_ || !browser_->UIT_GetWebView() ||
!browser_->UIT_GetWebView()->focusedFrame()) {
return NSMakeRect(0, 0, 0, 0);
}
WebRect webRect;
browser_->UIT_GetWebView()->focusedFrame()->firstRectForCharacterRange(
theRange.location, theRange.length, webRect);
NSRect rect = NSMakeRect(webRect.x, webRect.y, webRect.width, webRect.height);
// The returned rectangle is in WebKit coordinates (upper left origin), so
// flip the coordinate system and then convert it into screen coordinates for
// return.
NSRect viewFrame = [self frame];
rect.origin.y = NSHeight(viewFrame) - rect.origin.y;
rect.origin.y -= rect.size.height;
rect = [self convertRectToBase:rect];
rect.origin = [[self window] convertBaseToScreen:rect.origin];
return rect;
}
- (NSAttributedString *)attributedSubstringForProposedRange:(NSRange)theRange
actualRange:(NSRangePointer) actualRange {
if (actualRange)
*actualRange = theRange;
if (!browser_ || !browser_->UIT_GetWebView() ||
!browser_->UIT_GetWebView()->focusedFrame()) {
return nil;
}
return WebSubstringUtil::attributedSubstringInRange(
browser_->UIT_GetWebView()->focusedFrame(),
theRange.location,
theRange.length);
}
- (void)doCommandBySelector:(SEL)selector {
}
- (NSRange)markedRange {
return hasMarkedText_ ? markedRange_ : NSMakeRange(NSNotFound, 0);
}
- (NSRange)selectedRange {
return selectedRange_;
}
- (NSInteger)conversationIdentifier {
return reinterpret_cast<NSInteger>(self);
}
- (BOOL)hasMarkedText {
return hasMarkedText_;
}
- (void)unmarkText {
hasMarkedText_ = NO;
markedText_.clear();
underlines_.clear();
if (!handlingKeyDown_) {
if (browser_ && browser_->UIT_GetWebView())
browser_->UIT_GetWebView()->confirmComposition();
} else {
unmarkTextCalled_ = YES;
}
}
- (void)setMarkedText:(id)string selectedRange:(NSRange)newSelRange
replacementRange: (NSRange) replacementRange {
// An input method updates the composition string.
// We send the given text and range to the renderer so it can update the
// composition node of WebKit.
BOOL isAttributedString = [string isKindOfClass:[NSAttributedString class]];
NSString* im_text = isAttributedString ? [string string] : string;
int length = [im_text length];
// |markedRange_| will get set on a callback from ImeSetComposition().
selectedRange_ = newSelRange;
markedText_ = base::SysNSStringToUTF16(im_text);
hasMarkedText_ = (length > 0);
underlines_.clear();
if (isAttributedString) {
ExtractUnderlines(string, &underlines_);
} else {
// Use a thin black underline by default.
underlines_.push_back(
WebCompositionUnderline(0, length, SK_ColorBLACK, false));
}
// If we are handling a key down event, then SetComposition() will be
// called in keyEvent: method.
// Input methods of Mac use setMarkedText calls with an empty text to cancel
// an ongoing composition. So, we should check whether or not the given text
// is empty to update the input method state. (Our input method backend can
// automatically cancels an ongoing composition when we send an empty text.
// So, it is OK to send an empty text to the renderer.)
if (!handlingKeyDown_) {
if (browser_ && browser_->UIT_GetWebView()) {
const WebString markedText(markedText_);
browser_->UIT_GetWebView()->setComposition(markedText,
underlines_,
newSelRange.location,
NSMaxRange(newSelRange));
}
}
}
- (void)insertText:(id)string replacementRange: (NSRange) replacementRange {
BOOL isAttributedString = [string isKindOfClass:[NSAttributedString class]];
NSString* im_text = isAttributedString ? [string string] : string;
if (handlingKeyDown_) {
textToBeInserted_.append(base::SysNSStringToUTF16(im_text));
} else {
browser_->UIT_GetWebViewHost()->webwidget()->confirmComposition(
base::SysNSStringToUTF16(im_text));
}
// Inserting text will delete all marked text automatically.
hasMarkedText_ = NO;
}
///////////////////////////////////////////////////////////////////////////////
// Tooltip Support
// This code is copied from
// content/browser/renderer_host/render_widget_host_view_mac.mm
// Below is the nasty tooltip stuff -- copied from WebKit's WebHTMLView.mm
// with minor modifications for code style and commenting.
//
// The 'public' interface is -setToolTipAtMousePoint:. This differs from
// -setToolTip: in that the updated tooltip takes effect immediately,
// without the user's having to move the mouse out of and back into the view.
//
// Unfortunately, doing this requires sending fake mouseEnter/Exit events to
// the view, which in turn requires overriding some internal tracking-rect
// methods (to keep track of its owner & userdata, which need to be filled out
// in the fake events.) --snej 7/6/09
/*
* Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* (C) 2006, 2007 Graham Dennis (graham.dennis@gmail.com)
*
* 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
*/
// Any non-zero value will do, but using something recognizable might help us
// debug some day.
static const NSTrackingRectTag kTrackingRectTag = 0xBADFACE;
// Override of a public NSView method, replacing the inherited functionality.
// See above for rationale.
- (NSTrackingRectTag)addTrackingRect:(NSRect)rect
owner:(id)owner
userData:(void *)data
assumeInside:(BOOL)assumeInside {
DCHECK(trackingRectOwner_ == nil);
trackingRectOwner_ = owner;
trackingRectUserData_ = data;
return kTrackingRectTag;
}
// Override of (apparently) a private NSView method(!) See above for rationale.
- (NSTrackingRectTag)_addTrackingRect:(NSRect)rect
owner:(id)owner
userData:(void *)data
assumeInside:(BOOL)assumeInside
useTrackingNum:(int)tag {
DCHECK(tag == 0 || tag == kTrackingRectTag);
DCHECK(trackingRectOwner_ == nil);
trackingRectOwner_ = owner;
trackingRectUserData_ = data;
return kTrackingRectTag;
}
// Override of (apparently) a private NSView method(!) See above for rationale.
- (void)_addTrackingRects:(NSRect *)rects
owner:(id)owner
userDataList:(void **)userDataList
assumeInsideList:(BOOL *)assumeInsideList
trackingNums:(NSTrackingRectTag *)trackingNums
count:(int)count {
DCHECK(count == 1);
DCHECK(trackingNums[0] == 0 || trackingNums[0] == kTrackingRectTag);
DCHECK(trackingRectOwner_ == nil);
trackingRectOwner_ = owner;
trackingRectUserData_ = userDataList[0];
trackingNums[0] = kTrackingRectTag;
}
// Override of a public NSView method, replacing the inherited functionality.
// See above for rationale.
- (void)removeTrackingRect:(NSTrackingRectTag)tag {
if (tag == 0)
return;
if (tag == kTrackingRectTag) {
trackingRectOwner_ = nil;
return;
}
if (tag == lastToolTipTag_) {
[super removeTrackingRect:tag];
lastToolTipTag_ = 0;
return;
}
// If any other tracking rect is being removed, we don't know how it was
// created and it's possible there's a leak involved (see Radar 3500217).
NOTREACHED();
}
// Override of (apparently) a private NSView method(!)
- (void)_removeTrackingRects:(NSTrackingRectTag *)tags count:(int)count {
for (int i = 0; i < count; ++i) {
int tag = tags[i];
if (tag == 0)
continue;
DCHECK(tag == kTrackingRectTag);
trackingRectOwner_ = nil;
}
}
// Sends a fake NSMouseExited event to the view for its current tracking rect.
- (void)_sendToolTipMouseExited {
// Nothing matters except window, trackingNumber, and userData.
int windowNumber = [[self window] windowNumber];
NSEvent* fakeEvent = [NSEvent enterExitEventWithType:NSMouseExited
location:NSMakePoint(0, 0)
modifierFlags:0
timestamp:0
windowNumber:windowNumber
context:NULL
eventNumber:0
trackingNumber:kTrackingRectTag
userData:trackingRectUserData_];
[trackingRectOwner_ mouseExited:fakeEvent];
}
// Sends a fake NSMouseEntered event to the view for its current tracking rect.
- (void)_sendToolTipMouseEntered {
// Nothing matters except window, trackingNumber, and userData.
int windowNumber = [[self window] windowNumber];
NSEvent* fakeEvent = [NSEvent enterExitEventWithType:NSMouseEntered
location:NSMakePoint(0, 0)
modifierFlags:0
timestamp:0
windowNumber:windowNumber
context:NULL
eventNumber:0
trackingNumber:kTrackingRectTag
userData:trackingRectUserData_];
[trackingRectOwner_ mouseEntered:fakeEvent];
}
// Sets the view's current tooltip, to be displayed at the current mouse
// location. (This does not make the tooltip appear -- as usual, it only
// appears after a delay.) Pass null to remove the tooltip.
- (void)setToolTipAtMousePoint:(NSString *)string {
NSString *toolTip = [string length] == 0 ? nil : string;
if ((toolTip && toolTip_ && [toolTip isEqualToString:toolTip_]) ||
(!toolTip && !toolTip_)) {
return;
}
if (toolTip_) {
[self _sendToolTipMouseExited];
}
toolTip_.reset([toolTip copy]);
if (toolTip) {
// See radar 3500217 for why we remove all tooltips
// rather than just the single one we created.
[self removeAllToolTips];
NSRect wideOpenRect = NSMakeRect(-100000, -100000, 200000, 200000);
lastToolTipTag_ = [self addToolTipRect:wideOpenRect
owner:self
userData:NULL];
[self _sendToolTipMouseEntered];
}
}
// NSView calls this to get the text when displaying the tooltip.
- (NSString *)view:(NSView *)view
stringForToolTip:(NSToolTipTag)tag
point:(NSPoint)point
userData:(void *)data {
return [[toolTip_ retain] autorelease];
}
@end
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