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// Copyright 2013 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 "content/browser/renderer_host/webmenurunner_mac.h"
#include <stddef.h>
#import "base/message_loop/message_pump_mac.h"
#include "base/strings/sys_string_conversions.h"
@interface WebMenuRunner (PrivateAPI)
// Worker function used during initialization.
- (void)addItem:(const content::MenuItem&)item;
// 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<content::MenuItem>&)items
fontSize:(CGFloat)fontSize
rightAligned:(BOOL)rightAligned {
if ((self = [super init])) {
menu_.reset([[NSMenu alloc] initWithTitle:@""]);
[menu_ setAutoenablesItems:NO];
index_ = -1;
fontSize_ = fontSize;
rightAligned_ = rightAligned;
for (size_t i = 0; i < items.size(); ++i)
[self addItem:items[i]];
}
return self;
}
- (void)addItem:(const content::MenuItem&)item {
if (item.type == content::MenuItem::SEPARATOR) {
[menu_ addItem:[NSMenuItem separatorItem]];
return;
}
NSString* title = base::SysUTF16ToNSString(item.label);
NSMenuItem* menuItem = [menu_ addItemWithTitle:title
action:@selector(menuItemSelected:)
keyEquivalent:@""];
if (!item.tool_tip.empty()) {
NSString* toolTip = base::SysUTF16ToNSString(item.tool_tip);
[menuItem setToolTip:toolTip];
}
[menuItem setEnabled:(item.enabled && item.type != content::MenuItem::GROUP)];
[menuItem setTarget:self];
// Set various alignment/language attributes. Note that many (if not most) of
// these attributes are functional only on 10.6 and above.
base::scoped_nsobject<NSMutableDictionary> attrs(
[[NSMutableDictionary alloc] initWithCapacity:3]);
base::scoped_nsobject<NSMutableParagraphStyle> paragraphStyle(
[[NSMutableParagraphStyle alloc] init]);
[paragraphStyle setAlignment:rightAligned_ ? NSRightTextAlignment
: NSLeftTextAlignment];
NSWritingDirection writingDirection =
item.rtl ? NSWritingDirectionRightToLeft
: NSWritingDirectionLeftToRight;
[paragraphStyle setBaseWritingDirection:writingDirection];
[attrs setObject:paragraphStyle forKey:NSParagraphStyleAttributeName];
if (item.has_directional_override) {
base::scoped_nsobject<NSNumber> directionValue(
[[NSNumber alloc] initWithInteger:
writingDirection + NSTextWritingDirectionOverride]);
base::scoped_nsobject<NSArray> directionArray(
[[NSArray alloc] initWithObjects:directionValue.get(), nil]);
[attrs setObject:directionArray forKey:NSWritingDirectionAttributeName];
}
[attrs setObject:[NSFont menuFontOfSize:fontSize_]
forKey:NSFontAttributeName];
base::scoped_nsobject<NSAttributedString> attrTitle(
[[NSAttributedString alloc] initWithString:title attributes:attrs]);
[menuItem setAttributedTitle:attrTitle];
// We set the title as well as the attributed title here. The attributed title
// will be displayed in the menu, but typeahead will use the non-attributed
// string that doesn't contain any leading or trailing whitespace. This is
// what Apple uses in WebKit as well:
// http://trac.webkit.org/browser/trunk/Source/WebKit2/UIProcess/mac/WebPopupMenuProxyMac.mm#L90
NSCharacterSet* whitespaceSet = [NSCharacterSet whitespaceCharacterSet];
[menuItem setTitle:[title stringByTrimmingCharactersInSet:whitespaceSet]];
[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;
}
- (void)runMenuInView:(NSView*)view
withBounds:(NSRect)bounds
initialIndex:(int)index {
// 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.
base::scoped_nsobject<NSPopUpButtonCell> cell(
[[NSPopUpButtonCell alloc] initTextCell:@"" pullsDown:NO]);
[cell setMenu:menu_];
// We use selectItemWithTag below so if the index is out-of-bounds nothing
// bad happens.
[cell selectItemWithTag:index];
if (rightAligned_) {
[cell setUserInterfaceLayoutDirection:
NSUserInterfaceLayoutDirectionRightToLeft];
// setUserInterfaceLayoutDirection for NSMenu is supported on macOS 10.11+.
SEL sel = @selector(setUserInterfaceLayoutDirection:);
if ([menu_ respondsToSelector:sel]) {
NSUserInterfaceLayoutDirection direction =
NSUserInterfaceLayoutDirectionRightToLeft;
NSMethodSignature* signature =
[NSMenu instanceMethodSignatureForSelector:sel];
NSInvocation* invocation =
[NSInvocation invocationWithMethodSignature:signature];
[invocation setTarget:menu_.get()];
[invocation setSelector:sel];
[invocation setArgument:&direction atIndex:2];
[invocation invoke];
}
}
// When popping up a menu near the Dock, Cocoa restricts the menu
// size to not overlap the Dock, with a scroll arrow. Below a
// certain point this doesn't work. At that point the menu is
// popped up above the element, so that the current item can be
// selected without mouse-tracking selecting a different item
// immediately.
//
// Unfortunately, instead of popping up above the passed |bounds|,
// it pops up above the bounds of the view passed to inView:. Use a
// dummy view to fake this out.
base::scoped_nsobject<NSView> dummyView(
[[NSView alloc] initWithFrame:bounds]);
[view addSubview:dummyView];
// Display the menu, and set a flag if a menu item was chosen.
[cell attachPopUpWithFrame:[dummyView bounds] inView:dummyView];
{
// Ensure the UI can update while the menu is fading out.
base::ScopedPumpMessagesInPrivateModes pump_private;
[cell performClickWithFrame:[dummyView bounds] inView:dummyView];
}
[dummyView removeFromSuperview];
if ([self menuItemWasChosen])
index_ = [cell indexOfSelectedItem];
}
- (void)hide {
[menu_ cancelTracking];
}
- (int)indexOfSelectedItem {
return index_;
}
@end // WebMenuRunner
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