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// Copyright 2017 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.
cr.exportPath('print_preview');
/*
* Fit to page and fit to paper options will only be displayed for PDF
* documents. If the custom option is selected, an additional input field will
* appear to enter the custom scale factor.
*/
Polymer({
is: 'print-preview-scaling-settings',
behaviors: [SettingsBehavior, print_preview.SelectBehavior],
properties: {
disabled: {
type: Boolean,
observer: 'onDisabledChanged_',
},
isPdf: Boolean,
/** @private {string} */
currentValue_: {
type: String,
observer: 'onInputChanged_',
},
/** @private {boolean} */
customSelected_: {
type: Boolean,
computed: 'computeCustomSelected_(settingKey_, ' +
'settings.scalingType.*, settings.scalingTypePdf.*)',
},
/** @private {boolean} */
inputValid_: Boolean,
/** @private {boolean} */
dropdownDisabled_: {
type: Boolean,
value: false,
},
/** @private {string} */
settingKey_: {
type: String,
computed: 'computeSettingKey_(isPdf)',
},
/** Mirroring the enum so that it can be used from HTML bindings. */
ScalingValue: {
type: Object,
value: print_preview.ScalingType,
},
},
observers: [
'onScalingTypeSettingChanged_(settingKey_, settings.scalingType.value, ' +
'settings.scalingTypePdf.value)',
'onScalingSettingChanged_(settings.scaling.value)',
],
/** @private {string} */
lastValidScaling_: '',
/**
* Whether the custom scaling setting has been set to true, but the custom
* input has not yet been expanded. Used to determine whether changes in the
* dropdown are due to user input or sticky settings.
* @private {boolean}
*/
customScalingSettingSet_: false,
/**
* Whether the user has selected custom scaling in the dropdown, but the
* custom input has not yet been expanded. Used to determine whether to
* auto-focus the custom input.
* @private {boolean}
*/
userSelectedCustomScaling_: false,
onProcessSelectChange: function(value) {
const isCustom = value === print_preview.ScalingType.CUSTOM.toString();
if (isCustom && !this.customScalingSettingSet_) {
this.userSelectedCustomScaling_ = true;
} else {
this.customScalingSettingSet_ = false;
}
const valueAsNumber = parseInt(value, 10);
if (isCustom || value === print_preview.ScalingType.DEFAULT.toString()) {
this.setSetting('scalingType', valueAsNumber);
}
if (this.isPdf ||
this.getSetting('scalingTypePdf').value ===
print_preview.ScalingType.DEFAULT ||
this.getSetting('scalingTypePdf').value ===
print_preview.ScalingType.CUSTOM) {
this.setSetting('scalingTypePdf', valueAsNumber);
}
if (isCustom) {
this.setSetting('scaling', this.currentValue_);
}
},
/** @private */
updateScalingToValid_: function() {
if (!this.getSetting('scaling').valid) {
this.currentValue_ = this.lastValidScaling_;
} else {
this.lastValidScaling_ = this.currentValue_;
}
},
/**
* Updates the input string when scaling setting is set.
* @private
*/
onScalingSettingChanged_: function() {
const value = /** @type {string} */ (this.getSetting('scaling').value);
this.lastValidScaling_ = value;
this.currentValue_ = value;
},
/** @private */
onScalingTypeSettingChanged_: function() {
if (!this.settingKey_) {
return;
}
const value = /** @type {!print_preview.ScalingType} */
(this.getSettingValue(this.settingKey_));
if (value !== print_preview.ScalingType.CUSTOM) {
this.updateScalingToValid_();
} else {
this.customScalingSettingSet_ = true;
}
this.selectedValue = value.toString();
},
/**
* Updates scaling settings based on the validity and current value of the
* scaling input.
* @private
*/
onInputChanged_: function() {
this.setSettingValid('scaling', this.inputValid_);
if (this.currentValue_ !== '' && this.inputValid_ &&
this.currentValue_ !== this.getSettingValue('scaling')) {
this.setSetting('scaling', this.currentValue_);
}
},
/** @private */
onDisabledChanged_: function() {
this.dropdownDisabled_ = this.disabled && this.inputValid_;
},
/**
* @return {boolean} Whether the input should be disabled.
* @private
*/
inputDisabled_: function() {
return !this.customSelected_ || this.dropdownDisabled_;
},
/**
* @return {boolean} Whether the custom scaling option is selected.
* @private
*/
computeCustomSelected_: function() {
return !!this.settingKey_ &&
this.getSettingValue(this.settingKey_) ===
print_preview.ScalingType.CUSTOM;
},
/**
* @return {string} The key of the appropriate scaling setting.
* @private
*/
computeSettingKey_: function() {
return this.isPdf ? 'scalingTypePdf' : 'scalingType';
},
/** @private */
onCollapseChanged_: function() {
if (this.customSelected_ && this.userSelectedCustomScaling_) {
this.$$('print-preview-number-settings-section').getInput().focus();
}
this.customScalingSettingSet_ = false;
this.userSelectedCustomScaling_ = false;
},
});
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