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gecko-dev/dom/plugins/test/testplugin/nptest_windows.cpp

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C++
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/* ***** BEGIN LICENSE BLOCK *****
*
* Copyright (c) 2008, Mozilla Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of the Mozilla Corporation nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Contributor(s):
* Josh Aas <josh@mozilla.com>
* Jim Mathies <jmathies@mozilla.com>
*
* ***** END LICENSE BLOCK ***** */
#include "nptest_platform.h"
#include <windows.h>
#include <windowsx.h>
#include <stdio.h>
#include <d3d10_1.h>
#include <d2d1.h>
using namespace std;
void SetSubclass(HWND hWnd, InstanceData* instanceData);
void ClearSubclass(HWND hWnd);
LRESULT CALLBACK PluginWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
struct _PlatformData {
HWND childWindow;
IDXGIAdapter1 *adapter;
ID3D10Device1 *device;
ID3D10Texture2D *frontBuffer;
ID3D10Texture2D *backBuffer;
ID2D1Factory *d2d1Factory;
};
bool
pluginSupportsWindowMode()
{
return true;
}
bool
pluginSupportsWindowlessMode()
{
return true;
}
NPError
pluginInstanceInit(InstanceData* instanceData)
{
NPP npp = instanceData->npp;
instanceData->platformData = static_cast<PlatformData*>
(NPN_MemAlloc(sizeof(PlatformData)));
if (!instanceData->platformData)
return NPERR_OUT_OF_MEMORY_ERROR;
instanceData->platformData->childWindow = nullptr;
instanceData->platformData->device = nullptr;
instanceData->platformData->frontBuffer = nullptr;
instanceData->platformData->backBuffer = nullptr;
instanceData->platformData->adapter = nullptr;
instanceData->platformData->d2d1Factory = nullptr;
return NPERR_NO_ERROR;
}
static inline bool
openSharedTex2D(ID3D10Device* device, HANDLE handle, ID3D10Texture2D** out)
{
HRESULT hr = device->OpenSharedResource(handle, __uuidof(ID3D10Texture2D), (void**)out);
if (FAILED(hr) || !*out) {
return false;
}
return true;
}
// This is overloaded in d2d1.h so we can't use decltype().
typedef HRESULT (WINAPI*D2D1CreateFactoryFunc)(
D2D1_FACTORY_TYPE factoryType,
REFIID iid,
CONST D2D1_FACTORY_OPTIONS *pFactoryOptions,
void **factory
);
static IDXGIAdapter1*
FindDXGIAdapter(NPP npp, IDXGIFactory1* factory)
{
DXGI_ADAPTER_DESC preferred;
if (NPN_GetValue(npp, NPNVpreferredDXGIAdapter, &preferred) != NPERR_NO_ERROR) {
return nullptr;
}
UINT index = 0;
for (;;) {
IDXGIAdapter1* adapter = nullptr;
if (FAILED(factory->EnumAdapters1(index, &adapter)) || !adapter) {
return nullptr;
}
DXGI_ADAPTER_DESC desc;
if (SUCCEEDED(adapter->GetDesc(&desc)) &&
desc.AdapterLuid.LowPart == preferred.AdapterLuid.LowPart &&
desc.AdapterLuid.HighPart == preferred.AdapterLuid.HighPart &&
desc.VendorId == preferred.VendorId &&
desc.DeviceId == preferred.DeviceId)
{
return adapter;
}
adapter->Release();
index++;
}
}
// Note: we leak modules since we need them anyway.
bool
setupDxgiSurfaces(NPP npp, InstanceData* instanceData)
{
HMODULE dxgi = LoadLibraryA("dxgi.dll");
if (!dxgi) {
return false;
}
decltype(CreateDXGIFactory1)* createDXGIFactory1 =
(decltype(CreateDXGIFactory1)*)GetProcAddress(dxgi, "CreateDXGIFactory1");
if (!createDXGIFactory1) {
return false;
}
IDXGIFactory1* factory1 = nullptr;
HRESULT hr = createDXGIFactory1(__uuidof(IDXGIFactory1), (void**)&factory1);
if (FAILED(hr) || !factory1) {
return false;
}
instanceData->platformData->adapter = FindDXGIAdapter(npp, factory1);
if (!instanceData->platformData->adapter) {
return false;
}
HMODULE d3d10 = LoadLibraryA("d3d10_1.dll");
if (!d3d10) {
return false;
}
decltype(D3D10CreateDevice1)* createDevice =
(decltype(D3D10CreateDevice1)*)GetProcAddress(d3d10, "D3D10CreateDevice1");
if (!createDevice) {
return false;
}
hr = createDevice(
instanceData->platformData->adapter,
D3D10_DRIVER_TYPE_HARDWARE, nullptr,
D3D10_CREATE_DEVICE_BGRA_SUPPORT |
D3D10_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS,
D3D10_FEATURE_LEVEL_10_1,
D3D10_1_SDK_VERSION, &instanceData->platformData->device);
if (FAILED(hr) || !instanceData->platformData->device) {
return false;
}
if (!openSharedTex2D(instanceData->platformData->device,
instanceData->frontBuffer->sharedHandle,
&instanceData->platformData->frontBuffer))
{
return false;
}
if (!openSharedTex2D(instanceData->platformData->device,
instanceData->backBuffer->sharedHandle,
&instanceData->platformData->backBuffer))
{
return false;
}
HMODULE d2d1 = LoadLibraryA("D2d1.dll");
if (!d2d1) {
return false;
}
auto d2d1CreateFactory = (D2D1CreateFactoryFunc)GetProcAddress(d2d1, "D2D1CreateFactory");
if (!d2d1CreateFactory) {
return false;
}
D2D1_FACTORY_OPTIONS options;
options.debugLevel = D2D1_DEBUG_LEVEL_NONE;
hr = d2d1CreateFactory(D2D1_FACTORY_TYPE_MULTI_THREADED,
__uuidof(ID2D1Factory),
&options,
(void**)&instanceData->platformData->d2d1Factory);
if (FAILED(hr) || !instanceData->platformData->d2d1Factory) {
return false;
}
return true;
}
void
drawDxgiBitmapColor(InstanceData* instanceData)
{
NPP npp = instanceData->npp;
HRESULT hr;
IDXGISurface* surface = nullptr;
hr = instanceData->platformData->backBuffer->QueryInterface(
__uuidof(IDXGISurface), (void **)&surface);
if (FAILED(hr) || !surface) {
return;
}
D2D1_RENDER_TARGET_PROPERTIES props =
D2D1::RenderTargetProperties(
D2D1_RENDER_TARGET_TYPE_DEFAULT,
D2D1::PixelFormat(DXGI_FORMAT_UNKNOWN, D2D1_ALPHA_MODE_PREMULTIPLIED));
ID2D1RenderTarget* target = nullptr;
hr = instanceData->platformData->d2d1Factory->CreateDxgiSurfaceRenderTarget(
surface,
&props,
&target);
if (FAILED(hr) || !target) {
surface->Release();
return;
}
IDXGIKeyedMutex* mutex = nullptr;
hr = instanceData->platformData->backBuffer->QueryInterface(__uuidof(IDXGIKeyedMutex), (void**)&mutex);
if (mutex) {
mutex->AcquireSync(0, 0);
}
target->BeginDraw();
unsigned char subpixels[4];
memcpy(subpixels,
&instanceData->scriptableObject->drawColor,
sizeof(subpixels));
auto rect = D2D1::RectF(
0, 0,
instanceData->backBuffer->size.width,
instanceData->backBuffer->size.height);
auto color = D2D1::ColorF(
float(subpixels[3] * subpixels[2]) / 0xFF,
float(subpixels[3] * subpixels[1]) / 0xFF,
float(subpixels[3] * subpixels[0]) / 0xFF,
float(subpixels[3]) / 0xff);
ID2D1SolidColorBrush* brush = nullptr;
hr = target->CreateSolidColorBrush(color, &brush);
if (SUCCEEDED(hr) && brush) {
target->FillRectangle(rect, brush);
brush->Release();
brush = nullptr;
}
hr = target->EndDraw();
if (mutex) {
mutex->ReleaseSync(0);
mutex->Release();
mutex = nullptr;
}
target->Release();
surface->Release();
target = nullptr;
surface = nullptr;
NPN_SetCurrentAsyncSurface(npp, instanceData->backBuffer, NULL);
std::swap(instanceData->backBuffer, instanceData->frontBuffer);
std::swap(instanceData->platformData->backBuffer,
instanceData->platformData->frontBuffer);
}
void
pluginInstanceShutdown(InstanceData* instanceData)
{
PlatformData *pd = instanceData->platformData;
if (pd->frontBuffer) {
pd->frontBuffer->Release();
}
if (pd->backBuffer) {
pd->backBuffer->Release();
}
if (pd->d2d1Factory) {
pd->d2d1Factory->Release();
}
if (pd->device) {
pd->device->Release();
}
if (pd->adapter) {
pd->adapter->Release();
}
NPN_MemFree(instanceData->platformData);
instanceData->platformData = 0;
}
void
pluginDoSetWindow(InstanceData* instanceData, NPWindow* newWindow)
{
instanceData->window = *newWindow;
}
#define CHILD_WIDGET_SIZE 10
void
pluginWidgetInit(InstanceData* instanceData, void* oldWindow)
{
HWND hWnd = (HWND)instanceData->window.window;
if (oldWindow) {
// chrashtests/539897-1.html excercises this code
HWND hWndOld = (HWND)oldWindow;
ClearSubclass(hWndOld);
if (instanceData->platformData->childWindow) {
::DestroyWindow(instanceData->platformData->childWindow);
}
}
SetSubclass(hWnd, instanceData);
instanceData->platformData->childWindow =
::CreateWindowW(L"SCROLLBAR", L"Dummy child window",
WS_CHILD, 0, 0, CHILD_WIDGET_SIZE, CHILD_WIDGET_SIZE, hWnd, nullptr,
nullptr, nullptr);
}
static void
drawToDC(InstanceData* instanceData, HDC dc,
int x, int y, int width, int height)
{
switch (instanceData->scriptableObject->drawMode) {
case DM_DEFAULT:
{
const RECT fill = { x, y, x + width, y + height };
int oldBkMode = ::SetBkMode(dc, TRANSPARENT);
HBRUSH brush = ::CreateSolidBrush(RGB(0, 0, 0));
if (brush) {
::FillRect(dc, &fill, brush);
::DeleteObject(brush);
}
if (width > 6 && height > 6) {
brush = ::CreateSolidBrush(RGB(192, 192, 192));
if (brush) {
RECT inset = { x + 3, y + 3, x + width - 3, y + height - 3 };
::FillRect(dc, &inset, brush);
::DeleteObject(brush);
}
}
const char* uaString = NPN_UserAgent(instanceData->npp);
if (uaString && width > 10 && height > 10) {
HFONT font =
::CreateFontA(20, 0, 0, 0, 400, FALSE, FALSE, FALSE,
DEFAULT_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, 5, // CLEARTYPE_QUALITY
DEFAULT_PITCH, "Arial");
if (font) {
HFONT oldFont = (HFONT)::SelectObject(dc, font);
RECT inset = { x + 5, y + 5, x + width - 5, y + height - 5 };
::DrawTextA(dc, uaString, -1, &inset,
DT_LEFT | DT_TOP | DT_NOPREFIX | DT_WORDBREAK);
::SelectObject(dc, oldFont);
::DeleteObject(font);
}
}
::SetBkMode(dc, oldBkMode);
}
break;
case DM_SOLID_COLOR:
{
HDC offscreenDC = ::CreateCompatibleDC(dc);
if (!offscreenDC)
return;
const BITMAPV4HEADER bitmapheader = {
sizeof(BITMAPV4HEADER),
width,
height,
1, // planes
32, // bits
BI_BITFIELDS,
0, // unused size
0, 0, // unused metrics
0, 0, // unused colors used/important
0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000, // ARGB masks
};
uint32_t *pixelData;
HBITMAP offscreenBitmap =
::CreateDIBSection(dc, reinterpret_cast<const BITMAPINFO*>(&bitmapheader),
0, reinterpret_cast<void**>(&pixelData), 0, 0);
if (!offscreenBitmap)
return;
uint32_t rgba = instanceData->scriptableObject->drawColor;
unsigned int alpha = ((rgba & 0xFF000000) >> 24);
BYTE r = ((rgba & 0xFF0000) >> 16);
BYTE g = ((rgba & 0xFF00) >> 8);
BYTE b = (rgba & 0xFF);
// Windows expects premultiplied
r = BYTE(float(alpha * r) / 0xFF);
g = BYTE(float(alpha * g) / 0xFF);
b = BYTE(float(alpha * b) / 0xFF);
uint32_t premultiplied =
(alpha << 24) + (r << 16) + (g << 8) + b;
for (uint32_t* lastPixel = pixelData + width * height;
pixelData < lastPixel;
++pixelData)
*pixelData = premultiplied;
::SelectObject(offscreenDC, offscreenBitmap);
BLENDFUNCTION blendFunc;
blendFunc.BlendOp = AC_SRC_OVER;
blendFunc.BlendFlags = 0;
blendFunc.SourceConstantAlpha = 255;
blendFunc.AlphaFormat = AC_SRC_ALPHA;
::AlphaBlend(dc, x, y, width, height, offscreenDC, 0, 0, width, height,
blendFunc);
::DeleteObject(offscreenDC);
::DeleteObject(offscreenBitmap);
}
break;
}
}
void
pluginDraw(InstanceData* instanceData)
{
NPP npp = instanceData->npp;
if (!npp)
return;
HDC hdc = nullptr;
PAINTSTRUCT ps;
notifyDidPaint(instanceData);
if (instanceData->hasWidget)
hdc = ::BeginPaint((HWND)instanceData->window.window, &ps);
else
hdc = (HDC)instanceData->window.window;
if (hdc == nullptr)
return;
// Push the browser's hdc on the resource stack. If this test plugin is windowless,
// we share the drawing surface with the rest of the browser.
int savedDCID = SaveDC(hdc);
// When we have a widget, window.x/y are meaningless since our widget
// is always positioned correctly and we just draw into it at 0,0.
int x = instanceData->hasWidget ? 0 : instanceData->window.x;
int y = instanceData->hasWidget ? 0 : instanceData->window.y;
int width = instanceData->window.width;
int height = instanceData->window.height;
drawToDC(instanceData, hdc, x, y, width, height);
// Pop our hdc changes off the resource stack
RestoreDC(hdc, savedDCID);
if (instanceData->hasWidget)
::EndPaint((HWND)instanceData->window.window, &ps);
}
/* script interface */
int32_t
pluginGetEdge(InstanceData* instanceData, RectEdge edge)
{
if (!instanceData || !instanceData->hasWidget)
return NPTEST_INT32_ERROR;
// Get the plugin client rect in screen coordinates
RECT rect = {0};
if (!::GetClientRect((HWND)instanceData->window.window, &rect))
return NPTEST_INT32_ERROR;
::MapWindowPoints((HWND)instanceData->window.window, nullptr,
(LPPOINT)&rect, 2);
// Get the toplevel window frame rect in screen coordinates
HWND rootWnd = ::GetAncestor((HWND)instanceData->window.window, GA_ROOT);
if (!rootWnd)
return NPTEST_INT32_ERROR;
RECT rootRect;
if (!::GetWindowRect(rootWnd, &rootRect))
return NPTEST_INT32_ERROR;
switch (edge) {
case EDGE_LEFT:
return rect.left - rootRect.left;
case EDGE_TOP:
return rect.top - rootRect.top;
case EDGE_RIGHT:
return rect.right - rootRect.left;
case EDGE_BOTTOM:
return rect.bottom - rootRect.top;
}
return NPTEST_INT32_ERROR;
}
static BOOL
getWindowRegion(HWND wnd, HRGN rgn)
{
if (::GetWindowRgn(wnd, rgn) != ERROR)
return TRUE;
RECT clientRect;
if (!::GetClientRect(wnd, &clientRect))
return FALSE;
return ::SetRectRgn(rgn, 0, 0, clientRect.right, clientRect.bottom);
}
static RGNDATA*
computeClipRegion(InstanceData* instanceData)
{
HWND wnd = (HWND)instanceData->window.window;
HRGN rgn = ::CreateRectRgn(0, 0, 0, 0);
if (!rgn)
return nullptr;
HRGN ancestorRgn = ::CreateRectRgn(0, 0, 0, 0);
if (!ancestorRgn) {
::DeleteObject(rgn);
return nullptr;
}
if (!getWindowRegion(wnd, rgn)) {
::DeleteObject(ancestorRgn);
::DeleteObject(rgn);
return nullptr;
}
HWND ancestor = wnd;
for (;;) {
ancestor = ::GetAncestor(ancestor, GA_PARENT);
if (!ancestor || ancestor == ::GetDesktopWindow()) {
::DeleteObject(ancestorRgn);
DWORD size = ::GetRegionData(rgn, 0, nullptr);
if (!size) {
::DeleteObject(rgn);
return nullptr;
}
HANDLE heap = ::GetProcessHeap();
RGNDATA* data = static_cast<RGNDATA*>(::HeapAlloc(heap, 0, size));
if (!data) {
::DeleteObject(rgn);
return nullptr;
}
DWORD result = ::GetRegionData(rgn, size, data);
::DeleteObject(rgn);
if (!result) {
::HeapFree(heap, 0, data);
return nullptr;
}
return data;
}
if (!getWindowRegion(ancestor, ancestorRgn)) {
::DeleteObject(ancestorRgn);
::DeleteObject(rgn);
return 0;
}
POINT pt = { 0, 0 };
::MapWindowPoints(ancestor, wnd, &pt, 1);
if (::OffsetRgn(ancestorRgn, pt.x, pt.y) == ERROR ||
::CombineRgn(rgn, rgn, ancestorRgn, RGN_AND) == ERROR) {
::DeleteObject(ancestorRgn);
::DeleteObject(rgn);
return 0;
}
}
}
int32_t
pluginGetClipRegionRectCount(InstanceData* instanceData)
{
RGNDATA* data = computeClipRegion(instanceData);
if (!data)
return NPTEST_INT32_ERROR;
int32_t result = data->rdh.nCount;
::HeapFree(::GetProcessHeap(), 0, data);
return result;
}
static int32_t
addOffset(LONG coord, int32_t offset)
{
if (offset == NPTEST_INT32_ERROR)
return NPTEST_INT32_ERROR;
return coord + offset;
}
int32_t
pluginGetClipRegionRectEdge(InstanceData* instanceData,
int32_t rectIndex, RectEdge edge)
{
RGNDATA* data = computeClipRegion(instanceData);
if (!data)
return NPTEST_INT32_ERROR;
HANDLE heap = ::GetProcessHeap();
if (rectIndex >= int32_t(data->rdh.nCount)) {
::HeapFree(heap, 0, data);
return NPTEST_INT32_ERROR;
}
RECT rect = reinterpret_cast<RECT*>(data->Buffer)[rectIndex];
::HeapFree(heap, 0, data);
switch (edge) {
case EDGE_LEFT:
return addOffset(rect.left, pluginGetEdge(instanceData, EDGE_LEFT));
case EDGE_TOP:
return addOffset(rect.top, pluginGetEdge(instanceData, EDGE_TOP));
case EDGE_RIGHT:
return addOffset(rect.right, pluginGetEdge(instanceData, EDGE_LEFT));
case EDGE_BOTTOM:
return addOffset(rect.bottom, pluginGetEdge(instanceData, EDGE_TOP));
}
return NPTEST_INT32_ERROR;
}
static
void
createDummyWindowForIME(InstanceData* instanceData)
{
WNDCLASSW wndClass;
wndClass.style = 0;
wndClass.lpfnWndProc = DefWindowProcW;
wndClass.cbClsExtra = 0;
wndClass.cbWndExtra = 0;
wndClass.hInstance = GetModuleHandleW(NULL);
wndClass.hIcon = nullptr;
wndClass.hCursor = nullptr;
wndClass.hbrBackground = (HBRUSH)COLOR_WINDOW;
wndClass.lpszMenuName = NULL;
wndClass.lpszClassName = L"SWFlash_PlaceholderX";
RegisterClassW(&wndClass);
instanceData->placeholderWnd =
static_cast<void*>(CreateWindowW(L"SWFlash_PlaceholderX", L"", WS_CHILD, 0,
0, 0, 0, HWND_MESSAGE, NULL,
GetModuleHandleW(NULL), NULL));
}
/* windowless plugin events */
static bool
handleEventInternal(InstanceData* instanceData, NPEvent* pe, LRESULT* result)
{
switch ((UINT)pe->event) {
case WM_PAINT:
pluginDraw(instanceData);
return true;
case WM_MOUSEACTIVATE:
if (instanceData->hasWidget) {
::SetFocus((HWND)instanceData->window.window);
*result = MA_ACTIVATEANDEAT;
return true;
}
return false;
case WM_MOUSEWHEEL:
return true;
case WM_WINDOWPOSCHANGED: {
WINDOWPOS* pPos = (WINDOWPOS*)pe->lParam;
instanceData->winX = instanceData->winY = 0;
if (pPos) {
instanceData->winX = pPos->x;
instanceData->winY = pPos->y;
return true;
}
return false;
}
case WM_MOUSEMOVE:
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_MBUTTONDOWN:
case WM_MBUTTONUP:
case WM_RBUTTONDOWN:
case WM_RBUTTONUP: {
int x = instanceData->hasWidget ? 0 : instanceData->winX;
int y = instanceData->hasWidget ? 0 : instanceData->winY;
instanceData->lastMouseX = GET_X_LPARAM(pe->lParam) - x;
instanceData->lastMouseY = GET_Y_LPARAM(pe->lParam) - y;
if ((UINT)pe->event == WM_LBUTTONUP) {
instanceData->mouseUpEventCount++;
}
return true;
}
case WM_KEYDOWN:
instanceData->lastKeyText.erase();
*result = 0;
return true;
case WM_CHAR: {
*result = 0;
wchar_t uniChar = static_cast<wchar_t>(pe->wParam);
if (!uniChar) {
return true;
}
char utf8Char[6];
int len =
::WideCharToMultiByte(CP_UTF8, 0, &uniChar, 1, utf8Char, 6,
nullptr, nullptr);
if (len == 0 || len > 6) {
return true;
}
instanceData->lastKeyText.append(utf8Char, len);
return true;
}
case WM_IME_STARTCOMPOSITION:
instanceData->lastComposition.erase();
if (!instanceData->placeholderWnd) {
createDummyWindowForIME(instanceData);
}
return true;
case WM_IME_ENDCOMPOSITION:
instanceData->lastComposition.erase();
return true;
case WM_IME_COMPOSITION: {
if (pe->lParam & GCS_COMPSTR) {
HIMC hIMC = ImmGetContext((HWND)instanceData->placeholderWnd);
if (!hIMC) {
return false;
}
WCHAR compStr[256];
LONG len = ImmGetCompositionStringW(hIMC, GCS_COMPSTR, compStr,
256 * sizeof(WCHAR));
CHAR buffer[256];
len = ::WideCharToMultiByte(CP_UTF8, 0, compStr, len / sizeof(WCHAR),
buffer, 256, nullptr, nullptr);
instanceData->lastComposition.append(buffer, len);
::ImmReleaseContext((HWND)instanceData->placeholderWnd, hIMC);
}
return true;
}
default:
return false;
}
}
int16_t
pluginHandleEvent(InstanceData* instanceData, void* event)
{
NPEvent* pe = (NPEvent*)event;
if (pe == nullptr || instanceData == nullptr ||
instanceData->window.type != NPWindowTypeDrawable)
return 0;
LRESULT result = 0;
return handleEventInternal(instanceData, pe, &result);
}
/* windowed plugin events */
LRESULT CALLBACK PluginWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
WNDPROC wndProc = (WNDPROC)GetProp(hWnd, "MozillaWndProc");
if (!wndProc)
return 0;
InstanceData* pInstance = (InstanceData*)GetProp(hWnd, "InstanceData");
if (!pInstance)
return 0;
NPEvent event = { static_cast<uint16_t>(uMsg), wParam, lParam };
LRESULT result = 0;
if (handleEventInternal(pInstance, &event, &result))
return result;
if (uMsg == WM_CLOSE) {
ClearSubclass((HWND)pInstance->window.window);
}
return CallWindowProc(wndProc, hWnd, uMsg, wParam, lParam);
}
void
ClearSubclass(HWND hWnd)
{
if (GetProp(hWnd, "MozillaWndProc")) {
::SetWindowLongPtr(hWnd, GWLP_WNDPROC, (LONG_PTR)GetProp(hWnd, "MozillaWndProc"));
RemoveProp(hWnd, "MozillaWndProc");
RemoveProp(hWnd, "InstanceData");
}
}
void
SetSubclass(HWND hWnd, InstanceData* instanceData)
{
// Subclass the plugin window so we can handle our own windows events.
SetProp(hWnd, "InstanceData", (HANDLE)instanceData);
WNDPROC origProc = (WNDPROC)::SetWindowLongPtr(hWnd, GWLP_WNDPROC, (LONG_PTR)PluginWndProc);
SetProp(hWnd, "MozillaWndProc", (HANDLE)origProc);
}
static void checkEquals(int a, int b, const char* msg, string& error)
{
if (a == b) {
return;
}
error.append(msg);
char buf[100];
sprintf(buf, " (got %d, expected %d)\n", a, b);
error.append(buf);
}
void pluginDoInternalConsistencyCheck(InstanceData* instanceData, string& error)
{
if (instanceData->platformData->childWindow) {
RECT childRect;
::GetWindowRect(instanceData->platformData->childWindow, &childRect);
RECT ourRect;
HWND hWnd = (HWND)instanceData->window.window;
::GetWindowRect(hWnd, &ourRect);
checkEquals(childRect.left, ourRect.left, "Child widget left", error);
checkEquals(childRect.top, ourRect.top, "Child widget top", error);
checkEquals(childRect.right, childRect.left + CHILD_WIDGET_SIZE, "Child widget width", error);
checkEquals(childRect.bottom, childRect.top + CHILD_WIDGET_SIZE, "Child widget height", error);
}
}
bool pluginNativeWidgetIsVisible(InstanceData* instanceData)
{
HWND hWnd = (HWND)instanceData->window.window;
wchar_t className[60];
if (::GetClassNameW(hWnd, className, sizeof(className) / sizeof(char16_t)) &&
!wcsicmp(className, L"GeckoPluginWindow")) {
return ::IsWindowVisible(hWnd);
}
// something isn't right, fail the check
return false;
}
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