mirror of
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155 lines
3.6 KiB
C++
155 lines
3.6 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 "nsIWidget.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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PRUnichar 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.AssignLiteral("#");
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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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} // anonymous namespace
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AsyncColorChooser::AsyncColorChooser(DWORD aInitialColor, nsIWidget* aParentWidget, nsIColorPickerShownCallback* aCallback)
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: mInitialColor(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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CHOOSECOLOR options;
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static COLORREF customColors[16] = {0} ;
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AutoDestroyTmpWindow adtw((HWND) (mParentWidget.get() ?
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mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : nullptr));
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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;
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options.rgbResult = mInitialColor;
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options.lpCustColors = customColors;
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if (ChooseColor(&options)) {
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BGRIntToRGBString(options.rgbResult, mColor);
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}
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if (mCallback) {
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mCallback->Done(mColor);
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}
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return NS_OK;
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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_ISUPPORTS1(nsColorPicker, nsIColorPicker)
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NS_IMETHODIMP
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nsColorPicker::Init(nsIDOMWindow* parent, const nsAString& title, 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, mParentWidget, aCallback);
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return NS_DispatchToMainThread(event);
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}
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