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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/renderer/render_frame_font_family_accessor.h"
#include "content/public/renderer/render_frame.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/blink/public/web/web_performance_metrics_for_reporting.h"
namespace {
std::vector<std::string> WebStringVectorToStl(
const std::vector<blink::WebString>& web_vector) {
std::vector<std::string> stl_vector;
for (const blink::WebString& web_string : web_vector)
stl_vector.push_back(web_string.Utf8());
return stl_vector;
}
} // namespace
// static
void RenderFrameFontFamilyAccessor::Bind(
content::RenderFrame* render_frame,
mojo::PendingAssociatedReceiver<
chrome::mojom::RenderFrameFontFamilyAccessor> pending_receiver) {
new RenderFrameFontFamilyAccessor(render_frame, std::move(pending_receiver));
}
RenderFrameFontFamilyAccessor::RenderFrameFontFamilyAccessor(
content::RenderFrame* render_frame,
mojo::PendingAssociatedReceiver<
chrome::mojom::RenderFrameFontFamilyAccessor> pending_receiver)
: RenderFrameObserver(render_frame),
receiver_(this, std::move(pending_receiver)) {
// While unlikely, it is possible the fonts were requested after fcp. If this
// happens copy the fonts now.
if (ShouldGetFontNames())
GetFontNames();
}
RenderFrameFontFamilyAccessor::~RenderFrameFontFamilyAccessor() {
// Mojo requires the receiver to be destroyed before the callback, otherwise
// a DCHECK will be hit.
receiver_.reset();
}
bool RenderFrameFontFamilyAccessor::ShouldGetFontNames() const {
return !render_frame()
->GetWebFrame()
->PerformanceMetricsForReporting()
.FirstContentfulPaintRenderedButNotPresentedAsMonotonicTime()
.is_null();
}
void RenderFrameFontFamilyAccessor::GetFontNames() {
family_names_ = render_frame()->GetWebFrame()->GetWebFontFamilyNames();
}
void RenderFrameFontFamilyAccessor::GetFontFamilyNames(
GetFontFamilyNamesCallback callback) {
if (got_font_names()) {
RunCallback(std::move(callback));
} else {
// Browser side only requests once per interface.
DCHECK(!callback_);
callback_ = std::move(callback);
}
}
void RenderFrameFontFamilyAccessor::OnDestruct() {
delete this;
}
void RenderFrameFontFamilyAccessor::DidChangePerformanceTiming() {
if (!got_commit_ || got_font_names() || !ShouldGetFontNames())
return;
GetFontNames();
if (callback_)
RunCallback(std::move(callback_));
}
void RenderFrameFontFamilyAccessor::ReadyToCommitNavigation(
blink::WebDocumentLoader* docuqment_loader) {
if (got_commit_) {
// This is the second time ReadyToCommitNavigation() has been called.
// This means the renderer has started loading a different page than the
// fonts were originally requested for.
delete this;
} else {
got_commit_ = true;
}
}
void RenderFrameFontFamilyAccessor::RunCallback(
GetFontFamilyNamesCallback callback) {
std::move(callback).Run(WebStringVectorToStl(family_names_->font_names));
}
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