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ScenarioWebMessage.cpp
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90 lines (76 loc) · 3.18 KB
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// Copyright (C) Microsoft Corporation. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "stdafx.h"
#include "ScenarioWebMessage.h"
#include "AppWindow.h"
#include "CheckFailure.h"
using namespace Microsoft::WRL;
static constexpr WCHAR c_samplePath[] = L"ScenarioWebMessage.html";
ScenarioWebMessage::ScenarioWebMessage(AppWindow* appWindow)
: m_appWindow(appWindow), m_webView(appWindow->GetWebView())
{
m_sampleUri = m_appWindow->GetLocalUri(c_samplePath);
//! [IsWebMessageEnabled]
ComPtr<IWebView2Settings> settings;
CHECK_FAILURE(m_webView->get_Settings(&settings));
CHECK_FAILURE(settings->put_IsWebMessageEnabled(TRUE));
//! [IsWebMessageEnabled]
//! [WebMessageReceived]
// Setup the web message received event handler before navigating to
// ensure we don't miss any messages.
CHECK_FAILURE(m_webView->add_WebMessageReceived(
Microsoft::WRL::Callback<IWebView2WebMessageReceivedEventHandler>(
[this](IWebView2WebView* sender, IWebView2WebMessageReceivedEventArgs* args)
{
wil::unique_cotaskmem_string uri;
CHECK_FAILURE(args->get_Source(&uri));
// Always validate that the origin of the message is what you expect.
if (uri.get() != m_sampleUri)
{
return S_OK;
}
wil::unique_cotaskmem_string messageRaw;
CHECK_FAILURE(args->get_WebMessageAsString(&messageRaw));
std::wstring message = messageRaw.get();
if (message.compare(0, 13, L"SetTitleText ") == 0)
{
m_appWindow->SetTitleText(message.substr(13).c_str());
}
else if (message.compare(L"GetWindowBounds") == 0)
{
RECT bounds = m_appWindow->GetWindowBounds();
std::wstring reply =
L"{\"WindowBounds\":\"Left:" + std::to_wstring(bounds.left)
+ L"\\nTop:" + std::to_wstring(bounds.top)
+ L"\\nRight:" + std::to_wstring(bounds.right)
+ L"\\nBottom:" + std::to_wstring(bounds.bottom)
+ L"\"}";
CHECK_FAILURE(sender->PostWebMessageAsJson(reply.c_str()));
}
return S_OK;
}).Get(), &m_webMessageReceivedToken));
//! [WebMessageReceived]
// Turn off this scenario if we navigate away from the sample page
CHECK_FAILURE(m_webView->add_DocumentStateChanged(
Callback<IWebView2DocumentStateChangedEventHandler>(
[this](IWebView2WebView* sender,
IWebView2DocumentStateChangedEventArgs* args) -> HRESULT
{
wil::unique_cotaskmem_string uri;
sender->get_Source(&uri);
if (uri.get() != m_sampleUri)
{
m_appWindow->DeleteComponent(this);
}
return S_OK;
}).Get(), &m_documentStateChangedToken));
// Changes to IWebView2Settings::IsWebMessageEnabled apply to the next document
// to which we navigate.
CHECK_FAILURE(m_webView->Navigate(m_sampleUri.c_str()));
}
ScenarioWebMessage::~ScenarioWebMessage()
{
m_webView->remove_WebMessageReceived(m_webMessageReceivedToken);
m_webView->remove_DocumentStateChanged(m_documentStateChangedToken);
}