1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Retrieves and displays icons in native menu items on Mac OS X.
*/
/* exception_defines.h defines 'try' to 'if (true)' which breaks objective-c
exceptions and produces errors like: error: unexpected '@' in program'.
If we define __EXCEPTIONS exception_defines.h will avoid doing this.
See bug 666609 for more information.
We use <limits> to get the libstdc++ version. */
#include <limits>
#if __GLIBCXX__ <= 20070719
# ifndef __EXCEPTIONS
# define __EXCEPTIONS
# endif
#endif
#include "MOZIconHelper.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
#include "nsCocoaUtils.h"
#include "nsComputedDOMStyle.h"
#include "nsContentUtils.h"
#include "nsGkAtoms.h"
#include "nsIContent.h"
#include "nsIContentPolicy.h"
#include "nsMenuItemX.h"
#include "nsMenuItemIconX.h"
#include "nsNameSpaceManager.h"
#include "nsObjCExceptions.h"
using namespace mozilla;
using mozilla::dom::Element;
using mozilla::widget::IconLoader;
static const uint32_t kIconSize = 16;
nsMenuItemIconX::nsMenuItemIconX(Listener* aListener) : mListener(aListener) {
MOZ_COUNT_CTOR(nsMenuItemIconX);
}
nsMenuItemIconX::~nsMenuItemIconX() {
if (mIconLoader) {
mIconLoader->Destroy();
}
if (mIconImage) {
[mIconImage release];
mIconImage = nil;
}
MOZ_COUNT_DTOR(nsMenuItemIconX);
}
void nsMenuItemIconX::SetupIcon(nsIContent* aContent) {
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
bool shouldHaveIcon = StartIconLoad(aContent);
if (!shouldHaveIcon) {
// There is no icon for this menu item, as an error occurred while loading it.
// An icon might have been set earlier or the place holder icon may have
// been set. Clear it.
if (mIconImage) {
[mIconImage release];
mIconImage = nil;
}
return;
}
if (!mIconImage) {
// Set a placeholder icon, so that the menuitem reserves space for the icon during the load and
// there is no sudden shift once the icon finishes loading.
NSSize iconSize = NSMakeSize(kIconSize, kIconSize);
mIconImage = [[MOZIconHelper placeholderIconWithSize:iconSize] retain];
}
NS_OBJC_END_TRY_ABORT_BLOCK;
}
bool nsMenuItemIconX::StartIconLoad(nsIContent* aContent) {
RefPtr<nsIURI> iconURI = GetIconURI(aContent);
if (!iconURI) {
return false;
}
if (!mIconLoader) {
mIconLoader = new IconLoader(this);
}
nsresult rv = mIconLoader->LoadIcon(iconURI, aContent);
return NS_SUCCEEDED(rv);
}
already_AddRefed<nsIURI> nsMenuItemIconX::GetIconURI(nsIContent* aContent) {
// First, look at the content node's "image" attribute.
nsAutoString imageURIString;
bool hasImageAttr =
aContent->IsElement() &&
aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::image, imageURIString);
if (hasImageAttr) {
// Use the URL from the image attribute.
// If this menu item shouldn't have an icon, the string will be empty,
// and NS_NewURI will fail.
RefPtr<nsIURI> iconURI;
nsresult rv = NS_NewURI(getter_AddRefs(iconURI), imageURIString);
if (NS_FAILED(rv)) {
return nullptr;
}
mImageRegionRect.SetEmpty();
return iconURI.forget();
}
// If the content node has no "image" attribute, get the
// "list-style-image" property from CSS.
RefPtr<mozilla::dom::Document> document = aContent->GetComposedDoc();
if (!document || !aContent->IsElement()) {
return nullptr;
}
RefPtr<const ComputedStyle> sc = nsComputedDOMStyle::GetComputedStyle(aContent->AsElement());
if (!sc) {
return nullptr;
}
RefPtr<nsIURI> iconURI = sc->StyleList()->GetListStyleImageURI();
if (!iconURI) {
return nullptr;
}
// Check if the icon has a specified image region so that it can be
// cropped appropriately before being displayed.
const nsRect r = sc->StyleList()->GetImageRegion();
// Return nullptr if the image region is invalid so the image
// is not drawn, and behavior is similar to XUL menus.
if (r.X() < 0 || r.Y() < 0 || r.Width() < 0 || r.Height() < 0) {
return nullptr;
}
// 'auto' is represented by a [0, 0, 0, 0] rect. Only set mImageRegionRect
// if we have some other value.
if (r.IsEmpty()) {
mImageRegionRect.SetEmpty();
} else {
mImageRegionRect = r.ToNearestPixels(mozilla::AppUnitsPerCSSPixel());
}
mComputedStyle = std::move(sc);
mPresContext = document->GetPresContext();
return iconURI.forget();
}
//
// mozilla::widget::IconLoader::Listener
//
nsresult nsMenuItemIconX::OnComplete(imgIContainer* aImage) {
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
if (mIconImage) {
[mIconImage release];
mIconImage = nil;
}
RefPtr<nsPresContext> pc = mPresContext.get();
mIconImage = [[MOZIconHelper iconImageFromImageContainer:aImage
withSize:NSMakeSize(kIconSize, kIconSize)
presContext:pc
computedStyle:mComputedStyle
subrect:mImageRegionRect
scaleFactor:0.0f] retain];
mComputedStyle = nullptr;
mPresContext = nullptr;
if (mListener) {
mListener->IconUpdated();
}
mIconLoader->Destroy();
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK;
}
|
