1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_RENDERER_WEB_LINK_PREVIEW_TRIGGERER_IMPL_H_
#define CHROME_RENDERER_WEB_LINK_PREVIEW_TRIGGERER_IMPL_H_
#include "base/timer/timer.h"
#include "third_party/blink/public/web/web_link_preview_triggerer.h"
// Creates appropriate WebLinkPreviewTriggerer depending on feature flag and
// params.
std::unique_ptr<blink::WebLinkPreviewTriggerer> CreateWebLinkPreviewTriggerer();
// Observes events in frame and triggers Link Preview: Alt+hover trigger.
//
// This class tracks the state "is Alt key pressed" and mouse hovered anchor
// element. Alt key tracking is done by observing modifiers for each keyboard
// events and mouse leave event. See the comment of `last_key_event_modifiers_`
// for more details and limitations.
class WebLinkPreviewTriggererAltHover final
: public blink::WebLinkPreviewTriggerer {
public:
WebLinkPreviewTriggererAltHover();
~WebLinkPreviewTriggererAltHover() override;
// Movable but not copyable.
WebLinkPreviewTriggererAltHover(WebLinkPreviewTriggererAltHover&& other);
WebLinkPreviewTriggererAltHover& operator=(
WebLinkPreviewTriggererAltHover&& other);
WebLinkPreviewTriggererAltHover(const WebLinkPreviewTriggererAltHover&) =
delete;
WebLinkPreviewTriggererAltHover& operator=(
const WebLinkPreviewTriggererAltHover&) = delete;
// Implements blink::WebLinkPreviewTriggerer.
void MaybeChangedKeyEventModifier(int modifiers) override;
void DidChangeHoverElement(blink::WebElement element) override;
private:
void UpdateState(bool is_alt_on, blink::WebElement anchor_element);
void InitiatePreview();
std::unique_ptr<base::OneShotTimer> timer_;
bool is_alt_on_ = false;
blink::WebElement anchor_element_;
};
// Observes events in frame and triggers Link Preview: Long press trigger.
class WebLinkPreviewTriggererLongPress final
: public blink::WebLinkPreviewTriggerer {
public:
WebLinkPreviewTriggererLongPress();
~WebLinkPreviewTriggererLongPress() override;
// Movable but not copyable.
WebLinkPreviewTriggererLongPress(WebLinkPreviewTriggererLongPress&& other);
WebLinkPreviewTriggererLongPress& operator=(
WebLinkPreviewTriggererLongPress&& other);
WebLinkPreviewTriggererLongPress(const WebLinkPreviewTriggererLongPress&) =
delete;
WebLinkPreviewTriggererLongPress& operator=(
const WebLinkPreviewTriggererLongPress&) = delete;
// Implements blink::WebLinkPreviewTriggerer.
void DidChangeHoverElement(blink::WebElement element) override;
void DidAnchorElementReceiveMouseDownEvent(
blink::WebElement anchor_element,
blink::WebMouseEvent::Button button,
int click_count) override;
void DidAnchorElementReceiveMouseUpEvent(blink::WebElement anchor_element,
blink::WebMouseEvent::Button button,
int click_count) override;
private:
void InitiatePreview();
std::unique_ptr<base::OneShotTimer> timer_;
blink::WebElement anchor_element_;
};
#endif // CHROME_RENDERER_WEB_LINK_PREVIEW_TRIGGERER_IMPL_H_
|
