mirror of
https://github.com/mozilla/gecko-dev.git
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a8939590de
The bulk of this commit was generated by running:
run-clang-tidy.py \
-checks='-*,llvm-namespace-comment' \
-header-filter=^/.../mozilla-central/.* \
-fix
130 lines
3.4 KiB
C++
130 lines
3.4 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 "WindowHook.h"
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#include "nsWindow.h"
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#include "nsWindowDefs.h"
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namespace mozilla {
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namespace widget {
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nsresult
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WindowHook::AddHook(UINT nMsg, Callback callback, void *context) {
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MessageData *data = LookupOrCreate(nMsg);
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if (!data)
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return NS_ERROR_OUT_OF_MEMORY;
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// Ensure we don't overwrite another hook
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NS_ENSURE_TRUE(nullptr == data->hook.cb, NS_ERROR_UNEXPECTED);
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data->hook = CallbackData(callback, context);
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return NS_OK;
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}
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nsresult
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WindowHook::RemoveHook(UINT nMsg, Callback callback, void *context) {
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CallbackData cbdata(callback, context);
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MessageData *data = Lookup(nMsg);
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if (!data)
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return NS_ERROR_UNEXPECTED;
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if (data->hook != cbdata)
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return NS_ERROR_UNEXPECTED;
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data->hook = CallbackData();
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DeleteIfEmpty(data);
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return NS_OK;
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}
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nsresult
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WindowHook::AddMonitor(UINT nMsg, Callback callback, void *context) {
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MessageData *data = LookupOrCreate(nMsg);
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return (data && data->monitors.AppendElement(CallbackData(callback, context)))
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? NS_OK : NS_ERROR_OUT_OF_MEMORY;
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}
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nsresult
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WindowHook::RemoveMonitor(UINT nMsg, Callback callback, void *context) {
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CallbackData cbdata(callback, context);
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MessageData *data = Lookup(nMsg);
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if (!data)
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return NS_ERROR_UNEXPECTED;
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CallbackDataArray::index_type idx = data->monitors.IndexOf(cbdata);
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if (idx == CallbackDataArray::NoIndex)
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return NS_ERROR_UNEXPECTED;
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data->monitors.RemoveElementAt(idx);
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DeleteIfEmpty(data);
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return NS_OK;
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}
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WindowHook::MessageData *
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WindowHook::Lookup(UINT nMsg) {
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MessageDataArray::index_type idx;
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for (idx = 0; idx < mMessageData.Length(); idx++) {
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MessageData &data = mMessageData[idx];
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if (data.nMsg == nMsg)
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return &data;
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}
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return nullptr;
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}
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WindowHook::MessageData *
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WindowHook::LookupOrCreate(UINT nMsg) {
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MessageData *data = Lookup(nMsg);
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if (!data) {
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data = mMessageData.AppendElement();
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if (!data)
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return nullptr;
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data->nMsg = nMsg;
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}
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return data;
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}
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void
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WindowHook::DeleteIfEmpty(MessageData *data) {
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// Never remove a MessageData that has still a hook or monitor entries.
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if (data->hook || !data->monitors.IsEmpty())
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return;
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MessageDataArray::index_type idx;
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idx = data - mMessageData.Elements();
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NS_ASSERTION(idx < mMessageData.Length(), "Attempted to delete MessageData that doesn't belong to this array!");
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mMessageData.RemoveElementAt(idx);
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}
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bool
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WindowHook::Notify(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam,
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MSGResult& aResult)
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{
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MessageData *data = Lookup(nMsg);
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if (!data)
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return false;
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uint32_t length = data->monitors.Length();
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for (uint32_t midx = 0; midx < length; midx++) {
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data->monitors[midx].Invoke(hWnd, nMsg, wParam, lParam, &aResult.mResult);
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}
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aResult.mConsumed =
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data->hook.Invoke(hWnd, nMsg, wParam, lParam, &aResult.mResult);
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return aResult.mConsumed;
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}
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bool
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WindowHook::CallbackData::Invoke(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam,
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LRESULT *aResult) {
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if (!cb)
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return false;
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return cb(context, hWnd, msg, wParam, lParam, aResult);
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}
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} // namespace widget
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} // namespace mozilla
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