forked from mirrors/gecko-dev
bdca8af91d
This is no worse than what we were doing. In the future, instead of just querying the margin we may want to query extra information that requires a DC in windows too or what not, for example. Differential Revision: https://phabricator.services.mozilla.com/D85919
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; 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 "nsPaper.h"
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#include "nsPaperMargin.h"
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#include "nsPrinterBase.h"
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#include "mozilla/ErrorResult.h"
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#include "mozilla/dom/Promise.h"
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using mozilla::ErrorResult;
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NS_IMPL_CYCLE_COLLECTION(nsPaper, mMarginPromise, mPrinter)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPaper)
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NS_INTERFACE_MAP_ENTRY(nsIPaper)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIPaper)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPaper)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPaper)
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nsPaper::nsPaper(nsPrinterBase& aPrinter, const mozilla::PaperInfo& aInfo)
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: mPrinter(&aPrinter), mInfo(aInfo) {}
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nsPaper::~nsPaper() = default;
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NS_IMETHODIMP
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nsPaper::GetName(nsAString& aName) {
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aName = mInfo.mName;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPaper::GetWidth(double* aWidth) {
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NS_ENSURE_ARG_POINTER(aWidth);
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*aWidth = mInfo.mSize.Width();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPaper::GetHeight(double* aHeight) {
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NS_ENSURE_ARG_POINTER(aHeight);
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*aHeight = mInfo.mSize.Height();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPaper::GetUnwriteableMargin(JSContext* aCx, Promise** aPromise) {
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if (RefPtr<Promise> existing = mMarginPromise) {
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existing.forget(aPromise);
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return NS_OK;
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}
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ErrorResult rv;
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RefPtr<Promise> promise = Promise::Create(xpc::CurrentNativeGlobal(aCx), rv);
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if (MOZ_UNLIKELY(rv.Failed())) {
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return rv.StealNSResult();
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}
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mMarginPromise = promise;
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if (mInfo.mUnwriteableMargin) {
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auto margin = mozilla::MakeRefPtr<nsPaperMargin>(*mInfo.mUnwriteableMargin);
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mMarginPromise->MaybeResolve(margin);
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} else {
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mPrinter->QueryMarginsForPaper(*mMarginPromise, mInfo.mPaperId);
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}
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promise.forget(aPromise);
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return NS_OK;
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}
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