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FileComponent.cpp
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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 "FileComponent.h"
#include "CheckFailure.h"
#include <shlwapi.h>
#include <sstream>
using namespace Microsoft::WRL;
FileComponent::FileComponent(AppWindow* appWindow)
: m_appWindow(appWindow), m_webView(appWindow->GetWebView())
{
//! [DocumentTitleChanged]
// Register a handler for the DocumentTitleChanged event.
// This handler just announces the new title on the window's title bar.
CHECK_FAILURE(m_webView->add_DocumentTitleChanged(
Callback<ICoreWebView2DocumentTitleChangedEventHandler>(
[this](ICoreWebView2* sender, IUnknown* args) -> HRESULT {
wil::unique_cotaskmem_string title;
CHECK_FAILURE(sender->get_DocumentTitle(&title));
m_appWindow->SetDocumentTitle(title.get());
return S_OK;
})
.Get(),
&m_documentTitleChangedToken));
//! [DocumentTitleChanged]
}
bool FileComponent::HandleWindowMessage(
HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, LRESULT* result)
{
if (message == WM_COMMAND)
{
switch (LOWORD(wParam))
{
case IDM_SAVE_SCREENSHOT:
SaveScreenshot();
return true;
case IDM_PRINT_TO_PDF_LANDSCAPE:
m_enableLandscape = true;
case IDM_PRINT_TO_PDF_PORTRAIT:
if (m_printToPdfInProgress)
{
MessageBox(
m_appWindow->GetMainWindow(), L"Print to PDF is in progress.",
L"Print to PDF", MB_OK);
}
else
{
PrintToPdf(m_enableLandscape);
}
m_enableLandscape = false;
return true;
case IDM_GET_DOCUMENT_TITLE:
{
wil::unique_cotaskmem_string title;
m_webView->get_DocumentTitle(&title);
MessageBox(m_appWindow->GetMainWindow(), title.get(), L"Document Title", MB_OK);
return true;
}
}
}
return false;
}
//! [CapturePreview]
// Show the user a file selection dialog, then save a screenshot of the WebView
// to the selected file.
void FileComponent::SaveScreenshot()
{
WCHAR defaultName[MAX_PATH] = L"WebView2_Screenshot.png";
OPENFILENAME openFileName = CreateOpenFileName(defaultName, L"PNG File\0*.png\0");
if (GetSaveFileName(&openFileName))
{
wil::com_ptr<IStream> stream;
CHECK_FAILURE(SHCreateStreamOnFileEx(
defaultName, STGM_READWRITE | STGM_CREATE, FILE_ATTRIBUTE_NORMAL, TRUE, nullptr,
&stream));
HWND mainWindow = m_appWindow->GetMainWindow();
CHECK_FAILURE(m_webView->CapturePreview(
COREWEBVIEW2_CAPTURE_PREVIEW_IMAGE_FORMAT_PNG, stream.get(),
Callback<ICoreWebView2CapturePreviewCompletedHandler>(
[mainWindow](HRESULT error_code) -> HRESULT {
CHECK_FAILURE(error_code);
MessageBox(mainWindow, L"Preview Captured", L"Preview Captured", MB_OK);
return S_OK;
})
.Get()));
}
}
//! [CapturePreview]
//! [PrintToPdf]
// Shows the user a file selection dialog, then uses the selected path when
// printing to PDF. If `enableLandscape` is true, the page is printed
// in landscape mode, otherwise the page is printed in portrait mode.
void FileComponent::PrintToPdf(bool enableLandscape)
{
WCHAR defaultName[MAX_PATH] = L"WebView2_PrintedPdf.pdf";
OPENFILENAME openFileName = CreateOpenFileName(defaultName, L"PDF File\0*.pdf\0");
if (GetSaveFileName(&openFileName))
{
wil::com_ptr<ICoreWebView2PrintSettings> printSettings = nullptr;
if (enableLandscape)
{
wil::com_ptr<ICoreWebView2Environment6> webviewEnvironment6;
CHECK_FAILURE(m_appWindow->GetWebViewEnvironment()->QueryInterface(
IID_PPV_ARGS(&webviewEnvironment6)));
if (webviewEnvironment6)
{
CHECK_FAILURE(webviewEnvironment6->CreatePrintSettings(&printSettings));
CHECK_FAILURE(
printSettings->put_Orientation(COREWEBVIEW2_PRINT_ORIENTATION_LANDSCAPE));
}
}
wil::com_ptr<ICoreWebView2_7> webview2_7;
CHECK_FAILURE(m_webView->QueryInterface(IID_PPV_ARGS(&webview2_7)));
if (webview2_7)
{
m_printToPdfInProgress = true;
CHECK_FAILURE(webview2_7->PrintToPdf(
openFileName.lpstrFile, printSettings.get(),
Callback<ICoreWebView2PrintToPdfCompletedHandler>(
[this](HRESULT errorCode, BOOL isSuccessful) -> HRESULT {
CHECK_FAILURE(errorCode);
m_printToPdfInProgress = false;
auto showDialog = [isSuccessful] {
MessageBox(
nullptr,
(isSuccessful) ? L"Print to PDF succeeded"
: L"Print to PDF failed",
L"Print to PDF Completed", MB_OK);
};
m_appWindow->RunAsync([showDialog]() { showDialog(); });
return S_OK;
})
.Get()));
}
}
}
//! [PrintToPdf]
bool FileComponent::IsPrintToPdfInProgress()
{
return m_printToPdfInProgress;
}
OPENFILENAME FileComponent::CreateOpenFileName(LPWSTR defaultName, LPCWSTR filter)
{
OPENFILENAME openFileName = {};
openFileName.lStructSize = sizeof(openFileName);
openFileName.hwndOwner = nullptr;
openFileName.hInstance = nullptr;
openFileName.lpstrFile = defaultName;
openFileName.lpstrFilter = filter;
openFileName.nMaxFile = MAX_PATH;
openFileName.Flags = OFN_OVERWRITEPROMPT;
return openFileName;
}
FileComponent::~FileComponent()
{
m_webView->remove_DocumentTitleChanged(m_documentTitleChangedToken);
}