navigation_transition_utils.cc | Explore in Territory

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/renderer_host/navigation_transitions/navigation_transition_utils.h"

#include "components/viz/common/frame_sinks/copy_output_result.h"
#include "components/viz/host/host_frame_sink_manager.h"
#include "content/browser/compositor/surface_utils.h"
#include "content/browser/renderer_host/frame_tree.h"
#include "content/browser/renderer_host/frame_tree_node.h"
#include "content/browser/renderer_host/navigation_request.h"
#include "content/browser/renderer_host/navigation_transitions/navigation_entry_screenshot.h"
#include "content/browser/renderer_host/navigation_transitions/navigation_entry_screenshot_cache.h"
#include "content/browser/renderer_host/navigation_transitions/navigation_transition_config.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"
#include "ui/gfx/animation/animation.h"

#if BUILDFLAG(IS_ANDROID)
#include "content/browser/renderer_host/compositor_impl_android.h"
#include "ui/android/view_android.h"
#include "ui/android/window_android.h"
#endif

namespace content {

namespace {

CacheHitOrMissReason;

static gfx::Size g_output_size_for_test = …;

static int g_num_copy_requests_issued_for_testing = …;

// Construct a function-local variable instead of a standalone callback.
// Static local variables are first initialized when the function is first
// called (so we don't accidentally use this callback before it is even
// initialized); and base::NoDestructor makes sure the non-trivial destructor is
// not invoked.
NavigationTransitionUtils::ScreenshotCallback& GetTestScreenshotCallback() { … }

// Expect the following test methods to only be called if
// GetTestScreenshotCallback() is defined, and expect exactly one
// invocation for every call to CaptureNavigationEntryScreenshot.
// DO NOT invoke the test callback if the entry no longer exists.
void InvokeTestCallbackForNoScreenshot(
    const NavigationRequest& navigation_request) { … }

void InvokeTestCallback(int index,
                        const SkBitmap bitmap,
                        bool requested,
                        SkBitmap& override_bitmap) { … }

bool SupportsETC1NonPowerOfTwo(const NavigationRequest& navigation_request) { … }

// Returns the first entry that matches `destination_token`. Returns null if no
// match is found.
NavigationEntryImpl* GetEntryForToken(
    NavigationControllerImpl* controller,
    const blink::SameDocNavigationScreenshotDestinationToken&
        destination_token) { … }

void CacheScreenshotImpl(base::WeakPtr<NavigationControllerImpl> controller,
                         base::WeakPtr<NavigationRequest> navigation_request,
                         int navigation_entry_id,
                         bool is_copied_from_embedder,
                         int copy_output_request_sequence,
                         bool supports_etc_non_power_of_two,
                         const SkBitmap& bitmap) { … }

// We only want to capture screenshots for navigation entries reachable via
// session history navigations. Namely, we don't capture for navigations where
// the previous `NavigationEntry` will be either reloaded or replaced and
// deleted (e.g., `location.replace`, non-primary `FrameTree` navigations, etc).
bool CanTraverseToPreviousEntryAfterNavigation(
    const NavigationRequest& navigation_request) { … }

bool CanInitiateCaptureForNavigationStage(
    const NavigationRequest& navigation_request,
    bool did_receive_commit_ack) { … }

// Purge any existing screenshots from the destination entry. Invalidate instead
// of overwriting here because the screenshot is stale and can't be used
// anymore in future navigations to this entry, as the document that's about to
// be loaded might have different contents than when the screenshot was taken in
// a previous load. A new screenshot should be taken when navigating away from
// this entry again.
void RemoveScreenshotFromDestination(
    NavigationControllerImpl& navigation_controller,
    NavigationEntry* destination_entry) { … }

}  // namespace

void NavigationTransitionUtils::SetCapturedScreenshotSizeForTesting(
    const gfx::Size& size) { … }

int NavigationTransitionUtils::GetNumCopyOutputRequestIssuedForTesting() { … }

void NavigationTransitionUtils::ResetNumCopyOutputRequestIssuedForTesting() { … }

void NavigationTransitionUtils::SetNavScreenshotCallbackForTesting(
    ScreenshotCallback screenshot_callback) { … }

bool NavigationTransitionUtils::
    CaptureNavigationEntryScreenshotForCrossDocumentNavigations(
        NavigationRequest& navigation_request,
        bool did_receive_commit_ack) { … }

void NavigationTransitionUtils::SetSameDocumentNavigationEntryScreenshotToken(
    NavigationRequest& navigation_request,
    std::optional<blink::SameDocNavigationScreenshotDestinationToken>
        destination_token) { … }

}  // namespace content
chromium/content/browser/renderer_host/navigation_transitions/navigation_transition_utils.cc
