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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @typedef {{
* fittingType: !FittingType,
* userInitiated: boolean,
* }}
*/
let FitToChangedEvent;
(function() {
const FIT_TO_PAGE_BUTTON_STATE = 0;
const FIT_TO_WIDTH_BUTTON_STATE = 1;
Polymer({
is: 'viewer-zoom-toolbar',
properties: {
newPrintPreview: {
type: Boolean,
reflectToAttribute: true,
},
/** @private */
keyboardNavigationActive_: {
type: Boolean,
value: false,
},
/** @private */
showOnLeft_: {
type: Boolean,
computed: 'computeShowOnLeft_(newPrintPreview)',
reflectToAttribute: true,
},
},
listeners: {
'focus': 'onFocus_',
'keyup': 'onKeyUp_',
'pointerdown': 'onPointerDown_',
},
/** @private {boolean} */
isPrintPreview_: false,
/** @private {boolean} */
visible_: true,
/** @param {boolean} isPrintPreview */
setIsPrintPreview: function(isPrintPreview) {
this.isPrintPreview_ = isPrintPreview;
},
/** @return {boolean} */
isPrintPreview: function() {
return this.isPrintPreview_;
},
/** @return {boolean} */
isVisible: function() {
return this.visible_;
},
/** @private */
onFocus_: function() {
// This can only happen when the plugin is shown within Print Preview using
// keyboard navigation.
if (!this.visible_) {
assert(this.isPrintPreview_);
this.fire('keyboard-navigation-active', true);
this.show();
}
},
/** @private */
onKeyUp_: function() {
if (this.isPrintPreview_) {
this.fire('keyboard-navigation-active', true);
}
this.keyboardNavigationActive_ = true;
},
/** @private */
onPointerDown_: function() {
if (this.isPrintPreview_) {
this.fire('keyboard-navigation-active', false);
}
this.keyboardNavigationActive_ = false;
},
/**
* @return {boolean} Whether to show the zoom toolbar on the left side of the
* viewport.
* @private
*/
computeShowOnLeft_: function() {
return isRTL() !== this.newPrintPreview;
},
/**
* Change button tooltips to match any changes to localized strings.
* @param {!{tooltipFitToPage: string,
* tooltipFitToWidth: string,
* tooltipZoomIn: string,
* tooltipZoomOut: string}} strings
*/
setStrings: function(strings) {
this.$['fit-button'].tooltips =
[strings.tooltipFitToPage, strings.tooltipFitToWidth];
this.$['zoom-in-button'].tooltips = [strings.tooltipZoomIn];
this.$['zoom-out-button'].tooltips = [strings.tooltipZoomOut];
},
/** Handle clicks of the fit-button. */
fitToggle: function() {
this.fireFitToChangedEvent_(
this.$['fit-button'].activeIndex == FIT_TO_WIDTH_BUTTON_STATE ?
FittingType.FIT_TO_WIDTH :
FittingType.FIT_TO_PAGE,
true);
},
/** Handle the keyboard shortcut equivalent of fit-button clicks. */
fitToggleFromHotKey: function() {
this.fitToggle();
// Toggle the button state since there was no mouse click.
const button = this.$['fit-button'];
button.activeIndex =
(button.activeIndex == FIT_TO_WIDTH_BUTTON_STATE ?
FIT_TO_PAGE_BUTTON_STATE :
FIT_TO_WIDTH_BUTTON_STATE);
},
/**
* Handle forcing zoom via scripting to a fitting type.
* @param {!FittingType} fittingType Page fitting type to force.
*/
forceFit: function(fittingType) {
this.fireFitToChangedEvent_(fittingType, false);
// Set the button state since there was no mouse click.
const nextButtonState =
(fittingType == FittingType.FIT_TO_WIDTH ? FIT_TO_PAGE_BUTTON_STATE :
FIT_TO_WIDTH_BUTTON_STATE);
this.$['fit-button'].activeIndex = nextButtonState;
},
/**
* Fire a 'fit-to-changed' {CustomEvent} with the given FittingType as detail.
* @param {!FittingType} fittingType to include as payload.
* @param {boolean} userInitiated whether the event was initiated by a user
* action.
* @private
*/
fireFitToChangedEvent_: function(fittingType, userInitiated) {
this.fire(
'fit-to-changed',
{fittingType: fittingType, userInitiated: userInitiated});
},
/**
* Handle clicks of the zoom-in-button.
*/
zoomIn: function() {
this.fire('zoom-in');
},
/**
* Handle clicks of the zoom-out-button.
*/
zoomOut: function() {
this.fire('zoom-out');
},
show: function() {
if (!this.visible_) {
this.visible_ = true;
this.$['fit-button'].show();
this.$['zoom-in-button'].show();
this.$['zoom-out-button'].show();
}
},
hide: function() {
if (this.visible_) {
this.visible_ = false;
this.$['fit-button'].hide();
this.$['zoom-in-button'].hide();
this.$['zoom-out-button'].hide();
}
},
});
})();
|
