mirror of
https://github.com/classilla/tenfourfox.git
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213 lines
5.1 KiB
C++
213 lines
5.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsColorPicker.h"
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#include <shlwapi.h>
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#include "mozilla/AutoRestore.h"
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#include "nsIWidget.h"
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#include "nsString.h"
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#include "WidgetUtils.h"
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using namespace mozilla::widget;
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namespace
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{
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// Manages NS_NATIVE_TMP_WINDOW child windows. NS_NATIVE_TMP_WINDOWs are
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// temporary child windows of mParentWidget created to address RTL issues
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// in picker dialogs. We are responsible for destroying these.
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class AutoDestroyTmpWindow
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{
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public:
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explicit AutoDestroyTmpWindow(HWND aTmpWnd) :
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mWnd(aTmpWnd) {
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}
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~AutoDestroyTmpWindow() {
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if (mWnd)
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DestroyWindow(mWnd);
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}
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inline HWND get() const { return mWnd; }
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private:
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HWND mWnd;
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};
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static DWORD ColorStringToRGB(const nsAString& aColor)
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{
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DWORD result = 0;
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for (uint32_t i = 1; i < aColor.Length(); ++i) {
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result *= 16;
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char16_t c = aColor[i];
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if (c >= '0' && c <= '9') {
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result += c - '0';
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} else if (c >= 'a' && c <= 'f') {
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result += 10 + (c - 'a');
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} else {
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result += 10 + (c - 'A');
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}
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}
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DWORD r = result & 0x00FF0000;
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DWORD g = result & 0x0000FF00;
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DWORD b = result & 0x000000FF;
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r = r >> 16;
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b = b << 16;
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result = r | g | b;
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return result;
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}
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static nsString ToHexString(BYTE n)
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{
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nsString result;
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if (n <= 0x0F) {
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result.Append('0');
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}
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result.AppendInt(n, 16);
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return result;
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}
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static void
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BGRIntToRGBString(DWORD color, nsAString& aResult)
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{
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BYTE r = GetRValue(color);
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BYTE g = GetGValue(color);
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BYTE b = GetBValue(color);
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aResult.Assign('#');
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aResult.Append(ToHexString(r));
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aResult.Append(ToHexString(g));
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aResult.Append(ToHexString(b));
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}
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} // namespace
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static AsyncColorChooser* gColorChooser;
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AsyncColorChooser::AsyncColorChooser(COLORREF aInitialColor,
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nsIWidget* aParentWidget,
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nsIColorPickerShownCallback* aCallback)
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: mInitialColor(aInitialColor)
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, mColor(aInitialColor)
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, mParentWidget(aParentWidget)
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, mCallback(aCallback)
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{
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}
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NS_IMETHODIMP
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AsyncColorChooser::Run()
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{
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static COLORREF sCustomColors[16] = {0} ;
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MOZ_ASSERT(NS_IsMainThread(),
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"Color pickers can only be opened from main thread currently");
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// Allow only one color picker to be opened at a time, to workaround bug 944737
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if (!gColorChooser) {
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mozilla::AutoRestore<AsyncColorChooser*> restoreColorChooser(gColorChooser);
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gColorChooser = this;
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AutoDestroyTmpWindow adtw((HWND) (mParentWidget.get() ?
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mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : nullptr));
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CHOOSECOLOR options;
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options.lStructSize = sizeof(options);
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options.hwndOwner = adtw.get();
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options.Flags = CC_RGBINIT | CC_FULLOPEN | CC_ENABLEHOOK;
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options.rgbResult = mInitialColor;
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options.lpCustColors = sCustomColors;
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options.lpfnHook = HookProc;
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mColor = ChooseColor(&options) ? options.rgbResult : mInitialColor;
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} else {
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NS_WARNING("Currently, it's not possible to open more than one color "
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"picker at a time");
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mColor = mInitialColor;
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}
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if (mCallback) {
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nsAutoString colorStr;
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BGRIntToRGBString(mColor, colorStr);
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mCallback->Done(colorStr);
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}
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return NS_OK;
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}
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void
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AsyncColorChooser::Update(COLORREF aColor)
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{
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if (mColor != aColor) {
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mColor = aColor;
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nsAutoString colorStr;
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BGRIntToRGBString(mColor, colorStr);
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mCallback->Update(colorStr);
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}
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}
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/* static */ UINT_PTR CALLBACK
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AsyncColorChooser::HookProc(HWND aDialog, UINT aMsg,
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WPARAM aWParam, LPARAM aLParam)
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{
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if (!gColorChooser) {
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return 0;
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}
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if (aMsg == WM_CTLCOLORSTATIC) {
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// The color picker does not expose a proper way to retrieve the current
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// color, so we need to obtain it from the static control displaying the
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// current color instead.
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const int kCurrentColorBoxID = 709;
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if ((HWND)aLParam == GetDlgItem(aDialog, kCurrentColorBoxID)) {
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gColorChooser->Update(GetPixel((HDC)aWParam, 0, 0));
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}
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}
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////
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// nsIColorPicker
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nsColorPicker::nsColorPicker()
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{
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}
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nsColorPicker::~nsColorPicker()
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{
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}
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NS_IMPL_ISUPPORTS(nsColorPicker, nsIColorPicker)
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NS_IMETHODIMP
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nsColorPicker::Init(nsIDOMWindow* parent,
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const nsAString& title,
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const nsAString& aInitialColor)
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{
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NS_PRECONDITION(parent,
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"Null parent passed to colorpicker, no color picker for you!");
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mParentWidget = WidgetUtils::DOMWindowToWidget(parent);
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mInitialColor = ColorStringToRGB(aInitialColor);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsColorPicker::Open(nsIColorPickerShownCallback* aCallback)
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{
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NS_ENSURE_ARG(aCallback);
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nsCOMPtr<nsIRunnable> event = new AsyncColorChooser(mInitialColor,
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mParentWidget,
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aCallback);
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return NS_DispatchToMainThread(event);
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}
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