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
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/* -*- 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/. */
#include "nsColorPicker.h"
#include <shlwapi.h>
#include "mozilla/AutoRestore.h"
#include "nsIWidget.h"
#include "nsString.h"
#include "WidgetUtils.h"
using namespace mozilla::widget;
namespace
{
// Manages NS_NATIVE_TMP_WINDOW child windows. NS_NATIVE_TMP_WINDOWs are
// temporary child windows of mParentWidget created to address RTL issues
// in picker dialogs. We are responsible for destroying these.
class AutoDestroyTmpWindow
{
public:
explicit AutoDestroyTmpWindow(HWND aTmpWnd) :
mWnd(aTmpWnd) {
}
~AutoDestroyTmpWindow() {
if (mWnd)
DestroyWindow(mWnd);
}
inline HWND get() const { return mWnd; }
private:
HWND mWnd;
};
static DWORD ColorStringToRGB(const nsAString& aColor)
{
DWORD result = 0;
for (uint32_t i = 1; i < aColor.Length(); ++i) {
result *= 16;
char16_t c = aColor[i];
if (c >= '0' && c <= '9') {
result += c - '0';
} else if (c >= 'a' && c <= 'f') {
result += 10 + (c - 'a');
} else {
result += 10 + (c - 'A');
}
}
DWORD r = result & 0x00FF0000;
DWORD g = result & 0x0000FF00;
DWORD b = result & 0x000000FF;
r = r >> 16;
b = b << 16;
result = r | g | b;
return result;
}
static nsString ToHexString(BYTE n)
{
nsString result;
if (n <= 0x0F) {
result.Append('0');
}
result.AppendInt(n, 16);
return result;
}
static void
BGRIntToRGBString(DWORD color, nsAString& aResult)
{
BYTE r = GetRValue(color);
BYTE g = GetGValue(color);
BYTE b = GetBValue(color);
aResult.Assign('#');
aResult.Append(ToHexString(r));
aResult.Append(ToHexString(g));
aResult.Append(ToHexString(b));
}
} // namespace
static AsyncColorChooser* gColorChooser;
AsyncColorChooser::AsyncColorChooser(COLORREF aInitialColor,
nsIWidget* aParentWidget,
nsIColorPickerShownCallback* aCallback)
: mInitialColor(aInitialColor)
, mColor(aInitialColor)
, mParentWidget(aParentWidget)
, mCallback(aCallback)
{
}
NS_IMETHODIMP
AsyncColorChooser::Run()
{
static COLORREF sCustomColors[16] = {0} ;
MOZ_ASSERT(NS_IsMainThread(),
"Color pickers can only be opened from main thread currently");
// Allow only one color picker to be opened at a time, to workaround bug 944737
if (!gColorChooser) {
mozilla::AutoRestore<AsyncColorChooser*> restoreColorChooser(gColorChooser);
gColorChooser = this;
AutoDestroyTmpWindow adtw((HWND) (mParentWidget.get() ?
mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : nullptr));
CHOOSECOLOR options;
options.lStructSize = sizeof(options);
options.hwndOwner = adtw.get();
options.Flags = CC_RGBINIT | CC_FULLOPEN | CC_ENABLEHOOK;
options.rgbResult = mInitialColor;
options.lpCustColors = sCustomColors;
options.lpfnHook = HookProc;
mColor = ChooseColor(&options) ? options.rgbResult : mInitialColor;
} else {
NS_WARNING("Currently, it's not possible to open more than one color "
"picker at a time");
mColor = mInitialColor;
}
if (mCallback) {
nsAutoString colorStr;
BGRIntToRGBString(mColor, colorStr);
mCallback->Done(colorStr);
}
return NS_OK;
}
void
AsyncColorChooser::Update(COLORREF aColor)
{
if (mColor != aColor) {
mColor = aColor;
nsAutoString colorStr;
BGRIntToRGBString(mColor, colorStr);
mCallback->Update(colorStr);
}
}
/* static */ UINT_PTR CALLBACK
AsyncColorChooser::HookProc(HWND aDialog, UINT aMsg,
WPARAM aWParam, LPARAM aLParam)
{
if (!gColorChooser) {
return 0;
}
if (aMsg == WM_CTLCOLORSTATIC) {
// The color picker does not expose a proper way to retrieve the current
// color, so we need to obtain it from the static control displaying the
// current color instead.
const int kCurrentColorBoxID = 709;
if ((HWND)aLParam == GetDlgItem(aDialog, kCurrentColorBoxID)) {
gColorChooser->Update(GetPixel((HDC)aWParam, 0, 0));
}
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// nsIColorPicker
nsColorPicker::nsColorPicker()
{
}
nsColorPicker::~nsColorPicker()
{
}
NS_IMPL_ISUPPORTS(nsColorPicker, nsIColorPicker)
NS_IMETHODIMP
nsColorPicker::Init(mozIDOMWindowProxy* parent,
const nsAString& title,
const nsAString& aInitialColor)
{
NS_PRECONDITION(parent,
"Null parent passed to colorpicker, no color picker for you!");
mParentWidget = WidgetUtils::DOMWindowToWidget(nsPIDOMWindowOuter::From(parent));
mInitialColor = ColorStringToRGB(aInitialColor);
return NS_OK;
}
NS_IMETHODIMP
nsColorPicker::Open(nsIColorPickerShownCallback* aCallback)
{
NS_ENSURE_ARG(aCallback);
nsCOMPtr<nsIRunnable> event = new AsyncColorChooser(mInitialColor,
mParentWidget,
aCallback);
return NS_DispatchToMainThread(event);
}
|
