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- // Copyright 2014 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "printing/printing_context_system_dialog_win.h"
- #include <utility>
- #include "base/auto_reset.h"
- #include "base/strings/utf_string_conversions.h"
- #include "base/task/current_thread.h"
- #include "printing/backend/win_helper.h"
- #include "printing/buildflags/buildflags.h"
- #include "printing/mojom/print.mojom.h"
- #include "printing/print_settings_initializer_win.h"
- #include "skia/ext/skia_utils_win.h"
- #if BUILDFLAG(ENABLE_OOP_PRINTING)
- #include "printing/printing_features.h"
- #endif
- namespace printing {
- HWND PrintingContextSystemDialogWin::GetWindow() {
- #if BUILDFLAG(ENABLE_OOP_PRINTING)
- if (features::kEnableOopPrintDriversJobPrint.Get()) {
- // Delving through the view tree to get to root window happens separately
- // in the browser process (i.e., not in `PrintingContextSystemDialogWin`)
- // before sending the identified window owner to the Print Backend service.
- // This means that this call is happening in the service, and thus should
- // just use the parent view as-is instead of looking for the root window.
- // TODO(crbug.com/809738) Pursue having a service-level instantiation of
- // `PrintingContextSystemDialogWin` for this behavior. That would ensure
- // this logic would be compile-time driven and only invoked by the service.
- return reinterpret_cast<HWND>(delegate_->GetParentView());
- }
- #endif
- return GetRootWindow(delegate_->GetParentView());
- }
- PrintingContextSystemDialogWin::PrintingContextSystemDialogWin(
- Delegate* delegate)
- : PrintingContextWin(delegate) {}
- PrintingContextSystemDialogWin::~PrintingContextSystemDialogWin() {}
- void PrintingContextSystemDialogWin::AskUserForSettings(
- int max_pages,
- bool has_selection,
- bool is_scripted,
- PrintSettingsCallback callback) {
- DCHECK(!in_print_job_);
- HWND window = GetWindow();
- DCHECK(window);
- // Show the OS-dependent dialog box.
- // If the user press
- // - OK, the settings are reset and reinitialized with the new settings. OK is
- // returned.
- // - Apply then Cancel, the settings are reset and reinitialized with the new
- // settings. CANCEL is returned.
- // - Cancel, the settings are not changed, the previous setting, if it was
- // initialized before, are kept. CANCEL is returned.
- // On failure, the settings are reset and FAILED is returned.
- PRINTDLGEX dialog_options = {sizeof(PRINTDLGEX)};
- dialog_options.hwndOwner = window;
- // Disable options we don't support currently.
- // TODO(maruel): Reuse the previously loaded settings!
- dialog_options.Flags = PD_RETURNDC | PD_USEDEVMODECOPIESANDCOLLATE |
- PD_NOCURRENTPAGE | PD_HIDEPRINTTOFILE;
- if (!has_selection)
- dialog_options.Flags |= PD_NOSELECTION;
- PRINTPAGERANGE ranges[32];
- dialog_options.nStartPage = START_PAGE_GENERAL;
- if (max_pages) {
- // Default initialize to print all the pages.
- memset(ranges, 0, sizeof(ranges));
- ranges[0].nFromPage = 1;
- ranges[0].nToPage = max_pages;
- dialog_options.nPageRanges = 1;
- dialog_options.nMaxPageRanges = std::size(ranges);
- dialog_options.nMinPage = 1;
- dialog_options.nMaxPage = max_pages;
- dialog_options.lpPageRanges = ranges;
- } else {
- // No need to bother, we don't know how many pages are available.
- dialog_options.Flags |= PD_NOPAGENUMS;
- }
- if (ShowPrintDialog(&dialog_options) != S_OK) {
- ResetSettings();
- std::move(callback).Run(mojom::ResultCode::kFailed);
- return;
- }
- // TODO(maruel): Support PD_PRINTTOFILE.
- std::move(callback).Run(ParseDialogResultEx(dialog_options));
- }
- HRESULT PrintingContextSystemDialogWin::ShowPrintDialog(PRINTDLGEX* options) {
- // Runs always on the UI thread.
- static bool is_dialog_shown = false;
- if (is_dialog_shown)
- return E_FAIL;
- // Block opening dialog from nested task. It crashes PrintDlgEx.
- base::AutoReset<bool> auto_reset(&is_dialog_shown, true);
- // Note that this cannot use ui::BaseShellDialog as the print dialog is
- // system modal: opening it from a background thread can cause Windows to
- // get the wrong Z-order which will make the print dialog appear behind the
- // browser frame (but still being modal) so neither the browser frame nor
- // the print dialog will get any input. See http://crbug.com/342697
- // http://crbug.com/180997 for details.
- base::CurrentThread::ScopedNestableTaskAllower allow;
- return PrintDlgEx(options);
- }
- bool PrintingContextSystemDialogWin::InitializeSettingsWithRanges(
- const DEVMODE& dev_mode,
- const std::wstring& new_device_name,
- const PRINTPAGERANGE* ranges,
- int number_ranges,
- bool selection_only) {
- DCHECK(GetDeviceCaps(context(), CLIPCAPS));
- DCHECK(GetDeviceCaps(context(), RASTERCAPS) & RC_STRETCHDIB);
- DCHECK(GetDeviceCaps(context(), RASTERCAPS) & RC_BITMAP64);
- // Some printers don't advertise these.
- // DCHECK(GetDeviceCaps(context(), RASTERCAPS) & RC_SCALING);
- // DCHECK(GetDeviceCaps(context(), SHADEBLENDCAPS) & SB_CONST_ALPHA);
- // DCHECK(GetDeviceCaps(context(), SHADEBLENDCAPS) & SB_PIXEL_ALPHA);
- // StretchDIBits() support is needed for printing.
- if (!(GetDeviceCaps(context(), RASTERCAPS) & RC_STRETCHDIB) ||
- !(GetDeviceCaps(context(), RASTERCAPS) & RC_BITMAP64)) {
- NOTREACHED();
- ResetSettings();
- return false;
- }
- DCHECK(!in_print_job_);
- DCHECK(context());
- PageRanges ranges_vector;
- if (!selection_only) {
- // Convert the PRINTPAGERANGE array to a PrintSettings::PageRanges vector.
- ranges_vector.reserve(number_ranges);
- for (int i = 0; i < number_ranges; ++i) {
- PageRange range;
- // Transfer from 1-based to 0-based.
- range.from = ranges[i].nFromPage - 1;
- range.to = ranges[i].nToPage - 1;
- ranges_vector.push_back(range);
- }
- }
- settings_->set_ranges(ranges_vector);
- settings_->set_device_name(base::WideToUTF16(new_device_name));
- settings_->set_selection_only(selection_only);
- PrintSettingsInitializerWin::InitPrintSettings(context(), dev_mode,
- settings_.get());
- return true;
- }
- mojom::ResultCode PrintingContextSystemDialogWin::ParseDialogResultEx(
- const PRINTDLGEX& dialog_options) {
- // If the user clicked OK or Apply then Cancel, but not only Cancel.
- if (dialog_options.dwResultAction != PD_RESULT_CANCEL) {
- // Start fresh, but preserve is_modifiable print setting.
- bool is_modifiable = settings_->is_modifiable();
- ResetSettings();
- settings_->set_is_modifiable(is_modifiable);
- DEVMODE* dev_mode = NULL;
- if (dialog_options.hDevMode) {
- dev_mode =
- reinterpret_cast<DEVMODE*>(GlobalLock(dialog_options.hDevMode));
- DCHECK(dev_mode);
- }
- std::wstring device_name;
- if (dialog_options.hDevNames) {
- DEVNAMES* dev_names =
- reinterpret_cast<DEVNAMES*>(GlobalLock(dialog_options.hDevNames));
- DCHECK(dev_names);
- if (dev_names) {
- device_name = reinterpret_cast<const wchar_t*>(dev_names) +
- dev_names->wDeviceOffset;
- GlobalUnlock(dialog_options.hDevNames);
- }
- }
- bool success = false;
- if (dev_mode && !device_name.empty()) {
- set_context(dialog_options.hDC);
- PRINTPAGERANGE* page_ranges = NULL;
- DWORD num_page_ranges = 0;
- bool print_selection_only = false;
- if (dialog_options.Flags & PD_PAGENUMS) {
- page_ranges = dialog_options.lpPageRanges;
- num_page_ranges = dialog_options.nPageRanges;
- }
- if (dialog_options.Flags & PD_SELECTION) {
- print_selection_only = true;
- }
- success =
- InitializeSettingsWithRanges(*dev_mode, device_name, page_ranges,
- num_page_ranges, print_selection_only);
- }
- if (!success && dialog_options.hDC) {
- DeleteDC(dialog_options.hDC);
- set_context(NULL);
- }
- if (dev_mode) {
- GlobalUnlock(dialog_options.hDevMode);
- }
- } else {
- if (dialog_options.hDC) {
- DeleteDC(dialog_options.hDC);
- }
- }
- if (dialog_options.hDevMode != NULL)
- GlobalFree(dialog_options.hDevMode);
- if (dialog_options.hDevNames != NULL)
- GlobalFree(dialog_options.hDevNames);
- switch (dialog_options.dwResultAction) {
- case PD_RESULT_PRINT:
- return context() ? mojom::ResultCode::kSuccess
- : mojom::ResultCode::kFailed;
- case PD_RESULT_APPLY:
- return context() ? mojom::ResultCode::kCanceled
- : mojom::ResultCode::kFailed;
- case PD_RESULT_CANCEL:
- return mojom::ResultCode::kCanceled;
- default:
- return mojom::ResultCode::kFailed;
- }
- }
- } // namespace printing
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