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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/**
*
* Google Image Layout v0.0.1
* Description, by Anh Trinh.
* Heavily modified for searx
* http://trinhtrunganh.com
*
* @license Free to use under the MIT License.
*
*/
(function(w, d) {
'use strict';
function ImageLayout(container_selector, results_selector, img_selector, maxHeight) {
this.container_selector = container_selector;
this.results_selector = results_selector;
this.img_selector = img_selector;
this.margin = 10;
this.maxHeight = maxHeight;
this._alignAllDone = true;
}
/**
* Get the height that make all images fit the container
*
* width = w1 + w2 + w3 + ... = r1*h + r2*h + r3*h + ...
*
* @param {[type]} images the images to be calculated
* @param {[type]} width the container witdth
* @param {[type]} margin the margin between each image
*
* @return {[type]} the height
*/
ImageLayout.prototype._getHeigth = function(images, width) {
var r = 0,
img;
width -= images.length * this.margin;
for (var i = 0; i < images.length; i++) {
img = images[i];
if ((img.naturalWidth > 0) && (img.naturalHeight > 0)) {
r += img.naturalWidth / img.naturalHeight;
} else {
// assume that not loaded images are square
r += 1;
}
}
return width / r; //have to round down because Firefox will automatically roundup value with number of decimals > 3
};
ImageLayout.prototype._setSize = function(images, height) {
var img, imgWidth, imagesLength = images.length;
for (var i = 0; i < imagesLength; i++) {
img = images[i];
if ((img.naturalWidth > 0) && (img.naturalHeight > 0)) {
imgWidth = height * img.naturalWidth / img.naturalHeight;
} else {
// not loaded image : make it square as _getHeigth said it
imgWidth = height;
}
img.style.width = imgWidth + 'px';
img.style.height = height + 'px';
img.style.marginLeft = '3px';
img.style.marginTop = '3px';
img.style.marginRight = this.margin - 7 + 'px'; // -4 is the negative margin of the inline element
img.style.marginBottom = this.margin - 7 + 'px';
}
};
ImageLayout.prototype._alignImgs = function(imgGroup) {
var slice, h,
containerWidth = d.querySelector(this.container_selector).clientWidth;
w: while (imgGroup.length > 0) {
for (var i = 1; i <= imgGroup.length; i++) {
slice = imgGroup.slice(0, i);
h = this._getHeigth(slice, containerWidth);
if (h < this.maxHeight) {
this._setSize(slice, h);
imgGroup = imgGroup.slice(i);
continue w;
}
}
this._setSize(slice, Math.min(this.maxHeight, h));
break;
}
};
ImageLayout.prototype.align = function(results_selector) {
var results_selectorNode = d.querySelectorAll(this.results_selector),
results_length = results_selectorNode.length,
previous = null,
current = null,
imgGroup = [];
for (var i = 0; i < results_length; i++) {
current = results_selectorNode[i];
if (current.previousElementSibling !== previous && imgGroup.length > 0) {
// the current image is not conected to previous one
// so the current image is the start of a new group of images.
// so call _alignImgs to align the current group
this._alignImgs(imgGroup);
// and start a new empty group of images
imgGroup = [];
}
// add the current image to the group (only the img tag)
imgGroup.push(current.querySelector(this.img_selector));
// update the previous variable
previous = current;
}
// align the remaining images
if (imgGroup.length > 0) {
this._alignImgs(imgGroup);
}
};
ImageLayout.prototype.watch = function() {
var i, img, imgGroup, imgNodeLength,
obj = this,
results_nodes = d.querySelectorAll(this.results_selector),
results_length = results_nodes.length;
function align(e) {
obj.align();
}
function throttleAlign(e) {
if (obj._alignAllDone) {
obj._alignAllDone = false;
setTimeout(function() {
obj.align();
obj._alignAllDone = true;
}, 100);
}
}
w.addEventListener('resize', throttleAlign);
w.addEventListener('pageshow', align);
for (i = 0; i < results_length; i++) {
img = results_nodes[i].querySelector(this.img_selector);
if (typeof img !== 'undefined') {
img.addEventListener('load', throttleAlign);
img.addEventListener('error', throttleAlign);
}
}
};
w.searx.ImageLayout = ImageLayout;
})(window, document);
|
