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// Copyright (c) 2011 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.define('print_preview', function() {
'use strict';
/**
* Creates a CopiesSettings object.
* @constructor
*/
function CopiesSettings() {
this.copiesOption_ = $('copies-option');
this.textfield_ = $('copies');
this.incrementButton_ = $('increment');
this.decrementButton_ = $('decrement');
// Minimum allowed value for number of copies.
this.minValue_ = 1;
// Maximum allowed value for number of copies.
this.maxValue_ = 999;
this.collateOption_ = $('collate-option');
this.collateCheckbox_ = $('collate');
this.hint_ = $('copies-hint');
this.twoSidedCheckbox_ = $('two-sided');
}
cr.addSingletonGetter(CopiesSettings);
CopiesSettings.prototype = {
/**
* The number of copies represented by the contents of |this.textfield_|.
* If the text is not valid returns |this.minValue_|.
* @type {number}
*/
get numberOfCopies() {
var value = parseInt(this.textfield_.value, 10);
if (!value || value <= this.minValue_)
value = this.minValue_;
return value;
},
/**
* Getter method for |collateOption_|.
* @type {HTMLElement}
*/
get collateOption() {
return this.collateOption_;
},
/**
* Getter method for |twoSidedCheckbox_|.
* @type {HTMLInputElement}
*/
get twoSidedCheckbox() {
return this.twoSidedCheckbox_;
},
/**
* Gets the duplex mode for printing.
* @return {number} duplex mode.
*/
get duplexMode() {
// Constant values matches printing::DuplexMode enum. Not using const
// keyword because it is not allowed by JS strict mode.
var SIMPLEX = 0;
var LONG_EDGE = 1;
return !this.twoSidedCheckbox_.checked ? SIMPLEX : LONG_EDGE;
},
/**
* @return {boolean} true if |this.textfield_| is empty, or represents a
* positive integer value.
*/
isValid: function() {
return !this.textfield_.value || isPositiveInteger(this.textfield_.value);
},
/**
* Checks whether the preview collate setting value is set or not.
* @return {boolean} true if collate option is enabled and checked.
*/
isCollated: function() {
return !this.collateOption_.hidden && this.collateCheckbox_.checked;
},
/**
* Resets |this.textfield_| to |this.minValue_|.
* @private
*/
reset_: function() {
this.textfield_.value = this.minValue_;
},
/**
* Listener function to execute whenever the increment/decrement buttons are
* clicked.
* @private
* @param {int} sign Must be 1 for an increment button click and -1 for a
* decrement button click.
*/
onButtonClicked_: function(sign) {
if (!this.isValid()) {
this.reset_();
} else {
var newValue = this.numberOfCopies + sign;
this.textfield_.value = newValue;
}
this.updateButtonsState_();
this.showHideCollateOption_();
if (!hasPendingPreviewRequest) {
cr.dispatchSimpleEvent(document, 'updateSummary');
cr.dispatchSimpleEvent(document, 'updatePrintButton');
}
},
/**
* Listener function to execute whenever a change occurs in |textfield_|
* textfield.
* @private
*/
onTextfieldChanged_: function() {
this.updateButtonsState_();
this.showHideCollateOption_();
if (!hasPendingPreviewRequest) {
cr.dispatchSimpleEvent(document, 'updateSummary');
cr.dispatchSimpleEvent(document, 'updatePrintButton');
}
},
/**
* Adding listeners to all copies related controls. The listeners take care
* of altering their behavior depending on |hasPendingPreviewRequest|.
*/
addEventListeners: function() {
this.textfield_.oninput = this.onTextfieldChanged_.bind(this);
this.incrementButton_.onclick = this.onIncrementButtonClicked_.bind(this);
this.decrementButton_.onclick = this.onDecrementButtonClicked_.bind(this);
this.twoSidedCheckbox_.onclick = function() {
if (!hasPendingPreviewRequest)
cr.dispatchSimpleEvent(document, 'updateSummary');
}
document.addEventListener('PDFLoaded',
this.updateButtonsState_.bind(this));
document.addEventListener('printerCapabilitiesUpdated',
this.onPrinterCapabilitiesUpdated_.bind(this));
},
/**
* Listener triggered when a printerCapabilitiesUpdated event occurs.
* @private
*/
onPrinterCapabilitiesUpdated_: function(e) {
if (e.printerCapabilities.disableCopiesOption) {
fadeOutElement(this.copiesOption_);
$('hr-before-copies').classList.remove('invisible');
} else {
fadeInElement(this.copiesOption_);
$('hr-before-copies').classList.add('invisible');
}
this.twoSidedCheckbox_.checked = e.printerCapabilities.setDuplexAsDefault;
},
/**
* Listener triggered when |incrementButton_| is clicked.
* @private
*/
onIncrementButtonClicked_: function() {
this.onButtonClicked_(1);
},
/**
* Listener triggered when |decrementButton_| is clicked.
* @private
*/
onDecrementButtonClicked_: function() {
this.onButtonClicked_(-1);
},
/**
* Takes care of showing/hiding the collate option.
* @private
*/
showHideCollateOption_: function() {
this.collateOption_.hidden = this.numberOfCopies <= 1;
// TODO(aayushkumar): Remove aria-hidden attribute once elements within
// the hidden attribute are no longer read out by a screen-reader.
// (Currently a bug in webkit).
this.collateOption_.setAttribute('aria-hidden',
this.collateOption_.hidden);
},
/**
* Updates the state of the increment/decrement buttons based on the current
* |textfield_| value.
* @private
*/
updateButtonsState_: function() {
if (!this.isValid()) {
this.textfield_.classList.add('invalid');
this.incrementButton_.disabled = false;
this.decrementButton_.disabled = false;
fadeInElement(this.hint_);
} else {
this.textfield_.classList.remove('invalid');
this.incrementButton_.disabled = this.numberOfCopies == this.maxValue_;
this.decrementButton_.disabled = this.numberOfCopies == this.minValue_;
fadeOutElement(this.hint_);
}
this.hint_.setAttribute('aria-hidden', this.isValid());
}
};
return {
CopiesSettings: CopiesSettings,
};
});
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