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88 lines
3.1 KiB
C++
88 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsIDeviceContextSpec.h"
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#include "gfxPoint.h"
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#include "mozilla/gfx/PrintPromise.h"
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#include "nsError.h"
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#include "nsIPrintSettings.h"
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#include "mozilla/Components.h"
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#include "mozilla/TaskQueue.h"
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using mozilla::MakeRefPtr;
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using mozilla::gfx::PrintEndDocumentPromise;
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// We have some platform specific code here rather than in the appropriate
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// nsIDeviceContextSpec subclass. We structure the code this way so that
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// nsIDeviceContextSpecProxy gets the correct behavior without us having to
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// instantiate a platform specific nsIDeviceContextSpec subclass in content
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// processes. That is necessary for sandboxing.
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float nsIDeviceContextSpec::GetPrintingScale() {
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#ifdef XP_WIN
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if (mPrintSettings->GetOutputFormat() != nsIPrintSettings::kOutputFormatPDF
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# ifdef MOZ_ENABLE_SKIA_PDF
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&& !mPrintViaSkPDF
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# endif
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) {
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// The print settings will have the resolution stored from the real device.
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int32_t resolution;
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mPrintSettings->GetResolution(&resolution);
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return float(resolution) / GetDPI();
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}
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#endif
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return 72.0f / GetDPI();
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}
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gfxPoint nsIDeviceContextSpec::GetPrintingTranslate() {
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#ifdef XP_WIN
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// The underlying surface on windows is the size of the printable region. When
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// the region is smaller than the actual paper size the (0, 0) coordinate
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// refers top-left of that unwritable region. To instead have (0, 0) become
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// the top-left of the actual paper, translate it's coordinate system by the
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// unprintable region's width.
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double marginTop, marginLeft;
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mPrintSettings->GetUnwriteableMarginTop(&marginTop);
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mPrintSettings->GetUnwriteableMarginLeft(&marginLeft);
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int32_t resolution;
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mPrintSettings->GetResolution(&resolution);
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return gfxPoint(-marginLeft * resolution, -marginTop * resolution);
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#else
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return gfxPoint(0, 0);
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#endif
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}
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RefPtr<PrintEndDocumentPromise>
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nsIDeviceContextSpec::EndDocumentPromiseFromResult(nsresult aResult,
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const char* aSite) {
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return NS_SUCCEEDED(aResult)
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? PrintEndDocumentPromise::CreateAndResolve(true, aSite)
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: PrintEndDocumentPromise::CreateAndReject(aResult, aSite);
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}
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RefPtr<PrintEndDocumentPromise> nsIDeviceContextSpec::EndDocumentAsync(
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const char* aCallSite, AsyncEndDocumentFunction aFunction) {
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auto promise =
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MakeRefPtr<PrintEndDocumentPromise::Private>("PrintEndDocumentPromise");
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NS_DispatchBackgroundTask(
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NS_NewRunnableFunction(
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"EndDocumentAsync",
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[promise, function = std::move(aFunction)]() mutable {
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const auto result = function();
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if (NS_SUCCEEDED(result)) {
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promise->Resolve(true, __func__);
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} else {
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promise->Reject(result, __func__);
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}
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}),
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NS_DISPATCH_EVENT_MAY_BLOCK);
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return promise;
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}
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