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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/**
* Context menu for links
* Largely mimics click_a.js
*/
(function () {
let longClick = false;
/**
* Go up at most [depth] times, to retrieve a parent matching the provided predicate
* If one is found, it is returned immediately.
* Otherwise, null is returned.
*/
function _parentEl(el: HTMLElement, depth: number, predicate: (el: HTMLElement) => boolean): HTMLElement | null {
for (let i = 0; i < depth + 1; i++) {
if (predicate(el)) {
return el
}
const parent = el.parentElement;
if (!parent) {
return null
}
el = parent
}
return null
}
/**
* Given event and target, return true if handled and false otherwise.
*/
type EventHandler = (e: Event, target: HTMLElement) => Boolean
const _frostCopyComment: EventHandler = (e, target) => {
if (!target.hasAttribute('data-commentid')) {
return false;
}
const text = target.innerText;
console.log(`Copy comment ${text}`);
Frost.contextMenu(null, text);
return true;
};
/**
* Posts should click a tag, with two parents up being div.story_body_container
*/
const _frostCopyPost: EventHandler = (e, target) => {
if (target.tagName !== 'A') {
return false;
}
const parent1 = target.parentElement;
if (!parent1 || parent1.tagName !== 'DIV') {
return false;
}
const parent2 = parent1.parentElement;
if (!parent2 || !parent2.classList.contains('story_body_container')) {
return false;
}
const url = target.getAttribute('href');
const text = parent1.innerText;
console.log(`Copy post ${url} ${text}`);
Frost.contextMenu(url, text);
return true;
};
const _getImageStyleUrl = (el: Element): string | null => {
const img = el.querySelector("[style*=\"background-image: url(\"]");
if (!img) {
return null
}
return (<String>window.getComputedStyle(img, null).backgroundImage).trim().slice(4, -1);
};
/**
* Opens image activity for posts with just one image
*/
const _frostImage: EventHandler = (e, target) => {
const element = _parentEl(target, 2, (el) => el.tagName === 'A');
if (!element) {
return false;
}
const url = element.getAttribute('href');
if (!url || url === '#') {
return false;
}
const text = (<HTMLElement>element.parentElement).innerText;
// Check if image item exists, first in children and then in parent
const imageUrl = _getImageStyleUrl(element) || _getImageStyleUrl(<Element>element.parentElement);
if (imageUrl) {
console.log(`Context image: ${imageUrl}`);
Frost.loadImage(imageUrl, text);
return true;
}
// Check if true img exists
const img = element.querySelector("img[src*=scontent]");
if (img instanceof HTMLMediaElement) {
const imgUrl = img.src;
console.log(`Context img: ${imgUrl}`);
Frost.loadImage(imgUrl, text);
return true;
}
console.log(`Context content ${url} ${text}`);
Frost.contextMenu(url, text);
return true;
};
const handlers: EventHandler[] = [_frostImage, _frostCopyComment, _frostCopyPost];
const _frostAContext = (e: Event) => {
Frost.longClick(true);
longClick = true;
/*
* Commonality; check for valid target
*/
const target = e.target || e.currentTarget || e.srcElement;
if (!(target instanceof HTMLElement)) {
console.log("No element found");
return
}
for (const h of handlers) {
if (h(e, target)) {
e.stopPropagation();
e.preventDefault();
return
}
}
};
document.addEventListener('contextmenu', _frostAContext, true);
document.addEventListener('touchend', () => {
if (longClick) {
Frost.longClick(false);
longClick = false
}
}, true);
}).call(undefined);
|
