forked from mirrors/gecko-dev
113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
/* -*- 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 "WindowHook.h"
|
|
#include "nsWindow.h"
|
|
#include "nsWindowDefs.h"
|
|
|
|
namespace mozilla {
|
|
namespace widget {
|
|
|
|
nsresult WindowHook::AddHook(UINT nMsg, Callback callback, void* context) {
|
|
MessageData* data = LookupOrCreate(nMsg);
|
|
|
|
if (!data) return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
// Ensure we don't overwrite another hook
|
|
NS_ENSURE_TRUE(nullptr == data->hook.cb, NS_ERROR_UNEXPECTED);
|
|
|
|
data->hook = CallbackData(callback, context);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult WindowHook::RemoveHook(UINT nMsg, Callback callback, void* context) {
|
|
CallbackData cbdata(callback, context);
|
|
MessageData* data = Lookup(nMsg);
|
|
if (!data) return NS_ERROR_UNEXPECTED;
|
|
if (data->hook != cbdata) return NS_ERROR_UNEXPECTED;
|
|
data->hook = CallbackData();
|
|
|
|
DeleteIfEmpty(data);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult WindowHook::AddMonitor(UINT nMsg, Callback callback, void* context) {
|
|
MessageData* data = LookupOrCreate(nMsg);
|
|
return (data && data->monitors.AppendElement(CallbackData(callback, context),
|
|
fallible))
|
|
? NS_OK
|
|
: NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
nsresult WindowHook::RemoveMonitor(UINT nMsg, Callback callback,
|
|
void* context) {
|
|
CallbackData cbdata(callback, context);
|
|
MessageData* data = Lookup(nMsg);
|
|
if (!data) return NS_ERROR_UNEXPECTED;
|
|
CallbackDataArray::index_type idx = data->monitors.IndexOf(cbdata);
|
|
if (idx == CallbackDataArray::NoIndex) return NS_ERROR_UNEXPECTED;
|
|
data->monitors.RemoveElementAt(idx);
|
|
DeleteIfEmpty(data);
|
|
return NS_OK;
|
|
}
|
|
|
|
WindowHook::MessageData* WindowHook::Lookup(UINT nMsg) {
|
|
MessageDataArray::index_type idx;
|
|
for (idx = 0; idx < mMessageData.Length(); idx++) {
|
|
MessageData& data = mMessageData[idx];
|
|
if (data.nMsg == nMsg) return &data;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
WindowHook::MessageData* WindowHook::LookupOrCreate(UINT nMsg) {
|
|
MessageData* data = Lookup(nMsg);
|
|
if (!data) {
|
|
data = mMessageData.AppendElement();
|
|
|
|
if (!data) return nullptr;
|
|
|
|
data->nMsg = nMsg;
|
|
}
|
|
return data;
|
|
}
|
|
|
|
void WindowHook::DeleteIfEmpty(MessageData* data) {
|
|
// Never remove a MessageData that has still a hook or monitor entries.
|
|
if (data->hook || !data->monitors.IsEmpty()) return;
|
|
|
|
MessageDataArray::index_type idx;
|
|
idx = data - mMessageData.Elements();
|
|
NS_ASSERTION(
|
|
idx < mMessageData.Length(),
|
|
"Attempted to delete MessageData that doesn't belong to this array!");
|
|
mMessageData.RemoveElementAt(idx);
|
|
}
|
|
|
|
bool WindowHook::Notify(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult) {
|
|
MessageData* data = Lookup(nMsg);
|
|
if (!data) return false;
|
|
|
|
uint32_t length = data->monitors.Length();
|
|
for (uint32_t midx = 0; midx < length; midx++) {
|
|
data->monitors[midx].Invoke(hWnd, nMsg, wParam, lParam, &aResult.mResult);
|
|
}
|
|
|
|
aResult.mConsumed =
|
|
data->hook.Invoke(hWnd, nMsg, wParam, lParam, &aResult.mResult);
|
|
return aResult.mConsumed;
|
|
}
|
|
|
|
bool WindowHook::CallbackData::Invoke(HWND hWnd, UINT msg, WPARAM wParam,
|
|
LPARAM lParam, LRESULT* aResult) {
|
|
if (!cb) return false;
|
|
return cb(context, hWnd, msg, wParam, lParam, aResult);
|
|
}
|
|
|
|
} // namespace widget
|
|
} // namespace mozilla
|