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// Copyright (c) 2009 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.
#include "webkit/glue/webmenurunner_mac.h"
#include "base/sys_string_conversions.h"
namespace {
const CGFloat kPopupXOffset = -10.0f;
BOOL gNewNSMenuAPI;
} // namespace
#if !defined(MAC_OS_X_VERSION_10_6) || \
MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
@interface NSMenu (SnowLeopardSDKDeclarations)
- (BOOL)popUpMenuPositioningItem:(NSMenuItem *)item
atLocation:(NSPoint)location
inView:(NSView *)view;
- (void)setFont:(NSFont *)font;
@end
#endif
@interface WebMenuRunner (PrivateAPI)
// Worker function used during initialization.
- (void)addItem:(const WebMenuItem&)item
withAttributes:(NSDictionary*)attrs;
// A callback for the menu controller object to call when an item is selected
// from the menu. This is not called if the menu is dismissed without a
// selection.
- (void)menuItemSelected:(id)sender;
@end // WebMenuRunner (PrivateAPI)
@implementation WebMenuRunner
- (id)initWithItems:(const std::vector<WebMenuItem>&)items
fontSize:(CGFloat)fontSize
rightAligned:(BOOL)rightAligned {
static BOOL newNSMenuAPIInitialized = NO;
if (!newNSMenuAPIInitialized) {
newNSMenuAPIInitialized = YES;
gNewNSMenuAPI = [NSMenu instancesRespondToSelector:
@selector(popUpMenuPositioningItem:atLocation:inView:)] &&
[NSMenu instancesRespondToSelector:@selector(setFont:)];
}
if ((self = [super init])) {
menu_.reset([[NSMenu alloc] initWithTitle:@""]);
if (gNewNSMenuAPI)
[menu_ setFont:[NSFont menuFontOfSize:fontSize]];
[menu_ setAutoenablesItems:NO];
index_ = -1;
fontSize_ = fontSize;
scoped_nsobject<NSDictionary> attrs;
if (rightAligned) {
// NB: Right-aligning menu items in this manner is known to not work in
// Mac OS X 10.5.
scoped_nsobject<NSMutableParagraphStyle> paragraphStyle(
[[NSMutableParagraphStyle alloc] init]);
[paragraphStyle setAlignment:NSRightTextAlignment];
attrs.reset([[NSDictionary alloc] initWithObjectsAndKeys:
paragraphStyle, NSParagraphStyleAttributeName, nil]);
}
for (size_t i = 0; i < items.size(); ++i)
[self addItem:items[i] withAttributes:attrs];
}
return self;
}
- (void)addItem:(const WebMenuItem&)item
withAttributes:(NSDictionary*)attrs {
if (item.type == WebMenuItem::SEPARATOR) {
[menu_ addItem:[NSMenuItem separatorItem]];
return;
}
NSString* title = base::SysUTF16ToNSString(item.label);
NSMenuItem* menuItem = [menu_ addItemWithTitle:title
action:@selector(menuItemSelected:)
keyEquivalent:@""];
[menuItem setEnabled:(item.enabled && item.type != WebMenuItem::GROUP)];
[menuItem setTarget:self];
if (attrs) {
scoped_nsobject<NSAttributedString> attrTitle(
[[NSAttributedString alloc] initWithString:title
attributes:attrs]);
[menuItem setAttributedTitle:attrTitle];
}
if (gNewNSMenuAPI)
[menuItem setTag:[menu_ numberOfItems] - 1];
}
// Reflects the result of the user's interaction with the popup menu. If NO, the
// menu was dismissed without the user choosing an item, which can happen if the
// user clicked outside the menu region or hit the escape key. If YES, the user
// selected an item from the menu.
- (BOOL)menuItemWasChosen {
return menuItemWasChosen_;
}
- (void)menuItemSelected:(id)sender {
menuItemWasChosen_ = YES;
if (gNewNSMenuAPI)
index_ = [sender tag];
}
- (void)runMenuInView:(NSView*)view
withBounds:(NSRect)bounds
initialIndex:(int)index {
if (gNewNSMenuAPI) {
NSMenuItem* selectedItem = [menu_ itemAtIndex:index];
[selectedItem setState:NSOnState];
NSPoint anchor = NSMakePoint(NSMinX(bounds) + kPopupXOffset,
NSMaxY(bounds));
[menu_ popUpMenuPositioningItem:selectedItem
atLocation:anchor
inView:view];
} else {
// Set up the button cell, converting to NSView coordinates. The menu is
// positioned such that the currently selected menu item appears over the
// popup button, which is the expected Mac popup menu behavior.
NSPopUpButtonCell* button = [[NSPopUpButtonCell alloc] initTextCell:@""
pullsDown:NO];
[button autorelease];
[button setMenu:menu_];
[button selectItemAtIndex:index];
[button setFont:[NSFont menuFontOfSize:fontSize_]];
// Display the menu, and set a flag if a menu item was chosen.
[button performClickWithFrame:bounds inView:view];
if ([self menuItemWasChosen])
index_ = [button indexOfSelectedItem];
}
}
- (int)indexOfSelectedItem {
return index_;
}
@end // WebMenuRunner
namespace webkit_glue {
// Helper function for manufacturing input events to send to WebKit.
NSEvent* EventWithMenuAction(BOOL item_chosen, int window_num,
int item_height, int selected_index,
NSRect menu_bounds, NSRect view_bounds) {
NSEvent* event = nil;
double event_time = (double)(AbsoluteToDuration(UpTime())) / 1000.0;
if (item_chosen) {
// Construct a mouse up event to simulate the selection of an appropriate
// menu item.
NSPoint click_pos;
click_pos.x = menu_bounds.size.width / 2;
// This is going to be hard to calculate since the button is painted by
// WebKit, the menu by Cocoa, and we have to translate the selected_item
// index to a coordinate that WebKit's PopupMenu expects which uses a
// different font *and* expects to draw the menu below the button like we do
// on Windows.
// The WebKit popup menu thinks it will draw just below the button, so
// create the click at the offset based on the selected item's index and
// account for the different coordinate system used by NSView.
int item_offset = selected_index * item_height + item_height / 2;
click_pos.y = view_bounds.size.height - item_offset;
event = [NSEvent mouseEventWithType:NSLeftMouseUp
location:click_pos
modifierFlags:0
timestamp:event_time
windowNumber:window_num
context:nil
eventNumber:0
clickCount:1
pressure:1.0];
} else {
// Fake an ESC key event (keyCode = 0x1B, from webinputevent_mac.mm) and
// forward that to WebKit.
NSPoint key_pos;
key_pos.x = 0;
key_pos.y = 0;
NSString* escape_str = [NSString stringWithFormat:@"%c", 0x1B];
event = [NSEvent keyEventWithType:NSKeyDown
location:key_pos
modifierFlags:0
timestamp:event_time
windowNumber:window_num
context:nil
characters:@""
charactersIgnoringModifiers:escape_str
isARepeat:NO
keyCode:0x1B];
}
return event;
}
} // namespace webkit_glue
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