Refactor print preview web ui

chrome/browser/resources/print_preview/data/print_ticket_store.js

+// Copyright (c) 2012 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';
+
+  // TODO Maybe clear print ticket when destination changes. Or better yet,
+  // carry over any print ticket state that is possible. I.e. if destination
+  // changes, the new destination might not support duplex anymore, so we should
+  // clear the ticket's isDuplexEnabled state.
+
+  /**
+   * Storage of the print ticket and document statistics. Dispatches events when
+   * the contents of the print ticket or document statistics change. Also
+   * handles validation of the print ticket against destination capabilities and
+   * against the document.
+   * @param {!print_preview.DestinationStore} destinationStore Used to
+   *     understand which printer is selected.
+   * @constructor
+   * @extends {cr.EventTarget}
+   */
+  function PrintTicketStore(destinationStore) {
+    cr.EventTarget.call(this);
+
+    /**
+     * Destination store used to understand which printer is selected.
+     * @type {!print_preview.DestinationStore}
+     * @private
+     */
+    this.destinationStore_ = destinationStore;
+
+    // Create the document info with some initial settings. Actual
+    // page-related information won't be set until preview generation occurs,
+    // so we'll use some defaults until then. This way, the print ticket store
+    // will be valid even if no preview can be generated.
+    var initialPageSize = new print_preview.Size(612, 792); // 8.5"x11"
+
+    /**
+     * Information about the document to print.
+     * @type {!print_preview.DocumentInfo}
+     * @private
+     */
+    this.documentInfo_ = new print_preview.DocumentInfo();
+    this.documentInfo_.isModifiable = true;
+    this.documentInfo_.pageCount = 1;
+    this.documentInfo_.pageSize = initialPageSize;
+    this.documentInfo_.printableArea = new print_preview.PrintableArea(
+        new print_preview.Coordinate2d(0, 0), initialPageSize);
+
+    /**
+     * Printing capabilities of Chromium and the currently selected destination.
+     * @type {!print_preview.CapabilitiesHolder}
+     * @private
+     */
+    this.capabilitiesHolder_ = new print_preview.CapabilitiesHolder();
+
+    /**
+     * Current measurement system. Used to work with margin measurements.
+     * @type {!print_preview.MeasurementSystem}
+     * @private
+     */
+    this.measurementSystem_ = new print_preview.MeasurementSystem(
+        ',', '.', print_preview.MeasurementSystem.UnitType.IMPERIAL);
+
+    /**
+     * Collate ticket item.
+     * @type {!print_preview.ticket_items.Collate}
+     * @private
+     */
+    this.collate_ =
+          new print_preview.ticket_items.Collate(this.capabilitiesHolder_);
+
+    /**
+     * Color ticket item.
+     * @type {!print_preview.ticket_items.Color}
+     * @private
+     */
+    this.color_ = new print_preview.ticket_items.Color(
+        this.capabilitiesHolder_, this.destinationStore_);
+
+    /**
+     * Copies ticket item.
+     * @type {!print_preview.ticket_items.Copies}
+     * @private
+     */
+    this.copies_ =
+        new print_preview.ticket_items.Copies(this.capabilitiesHolder_);
+
+    /**
+     * Duplex ticket item.
+     * @type {!print_preview.ticket_items.Duplex}
+     * @private
+     */
+    this.duplex_ =
+        new print_preview.ticket_items.Duplex(this.capabilitiesHolder_);
+
+    /**
+     * Landscape ticket item.
+     * @type {!print_preview.ticket_items.Landscape}
+     * @private
+     */
+    this.landscape_ = new print_preview.ticket_items.Landscape(
+        this.capabilitiesHolder_, this.documentInfo_);
+
+    /**
+     * Page range ticket item.
+     * @type {!print_preview.ticket_items.PageRange}
+     * @private
+     */
+    this.pageRange_ =
+        new print_preview.ticket_items.PageRange(this.documentInfo_);
+
+    /**
+     * Margins type ticket item.
+     * @type {!print_preview.ticket_items.MarginsType}
+     * @private
+     */
+    this.marginsType_ =
+        new print_preview.ticket_items.MarginsType(this.documentInfo_);
+
+    /**
+     * Custom margins ticket item.
+     * @type {!print_preview.ticket_items.CustomMargins}
+     * @private
+     */
+    this.customMargins_ = new print_preview.ticket_items.CustomMargins(
+        this.documentInfo_, this.measurementSystem_);
+
+    /**
+     * Header-footer ticket item.
+     * @type {!print_preview.ticket_items.HeaderFooter}
+     * @private
+     */
+    this.headerFooter_ = new print_preview.ticket_items.HeaderFooter(
+        this.documentInfo_, this.marginsType_, this.customMargins_);
+
+    /**
+     * Fit-to-page ticket item.
+     * @type {!print_preview.ticket_items.FitToPage}
+     * @private
+     */
+    this.fitToPage_ = new print_preview.ticket_items.FitToPage(
+        this.documentInfo_, this.destinationStore_);
+  };
+
+  /**
+   * Event types dispatched by the print ticket store.
+   * @enum {string}
+   */
+  PrintTicketStore.EventType = {
+    CAPABILITIES_CHANGE: 'print_preview.PrintTicketStore.CAPABILITIES_CHANGE',
+    DOCUMENT_CHANGE: 'print_preview.PrintTicketStore.DOCUMENT_CHANGE',
+    INITIALIZE: 'print_preview.PrintTicketStore.INITIALIZE',
+    TICKET_CHANGE: 'print_preview.PrintTicketStore.TICKET_CHANGE'
+  };
+
+  PrintTicketStore.prototype = {
+    __proto__: cr.EventTarget.prototype,
+
+    /** @return {boolean} Whether the document is modifiable. */
+    get isDocumentModifiable() {
+      return this.documentInfo_.isModifiable;
+    },
+
+    /** @return {number} Number of pages in the document. */
+    get pageCount() {
+      return this.documentInfo_.pageCount;
+    },
+
+    /**
+     * @param {number} pageCount New number of pages in the document.
+     *     Dispatches a DOCUMENT_CHANGE event if the value changes.
+     */
+    updatePageCount: function(pageCount) {
+      if (this.documentInfo_.pageCount != pageCount) {
+        this.documentInfo_.pageCount = pageCount;
+        cr.dispatchSimpleEvent(
+            this, PrintTicketStore.EventType.DOCUMENT_CHANGE);
+      }
+    },
+
+    /**
+     * @return {!print_preview.PrintableArea} Printable area of the document in
+     *     points.
+     */
+    get printableArea() {
+      return this.documentInfo_.printableArea;
+    },
+
+    /** @return {!print_preview.Size} Size of the document in points. */
+    get pageSize() {
+      return this.documentInfo_.pageSize;
+    },
+
+    /**
+     * Updates a subset of fields of the print document relating to the format
+     * of the page.
+     * @param {!print_preview.PrintableArea} printableArea New printable area of
+     *     the document in points. Dispatches a DOCUMENT_CHANGE event if the
+     *     value changes.
+     * @param {!print_preview.Size} pageSize New size of the document in points.
+     *     Dispatches a DOCUMENT_CHANGE event if the value changes.
+     * @param {boolean} documentHasCssMediaStyles Whether the document is styled
+     *     with CSS media styles.
+     * @param {!print_preview.Margins} margins Document margins in points.
+     */
+    updateDocumentPageInfo: function(
+        printableArea, pageSize, documentHasCssMediaStyles, margins) {
+      if (!this.documentInfo_.printableArea.equals(printableArea) ||
+          !this.documentInfo_.pageSize.equals(pageSize) ||
+          this.documentInfo_.hasCssMediaStyles != documentHasCssMediaStyles ||
+          !this.documentInfo_.margins.equals(margins)) {
+        this.documentInfo_.printableArea = printableArea;
+        this.documentInfo_.pageSize = pageSize;
+        this.documentInfo_.hasCssMediaStyles = documentHasCssMediaStyles;
+        this.documentInfo_.margins = margins;
+        cr.dispatchSimpleEvent(
+            this, PrintTicketStore.EventType.DOCUMENT_CHANGE);
+      }
+    },
+
+    /**
+     * @return {!print_preview.MeasurementSystem} Measurement system of the
+     *     local system.
+     */
+    get measurementSystem() {
+      return this.measurementSystem_;
+    },
+
+    /**
+     * Initializes the print ticket store. Dispatches an INITIALIZE event.
+     * @param {boolean} isDocumentModifiable Whether the document to print is
+     *     modifiable (i.e. can be re-flowed by Chromium).
+     * @param {?boolean} isDuplexEnabled Previous duplex setting.
+     * @param {?boolean} isHeaderFooterEnabled Previous header-footer setting.
+     * @param {?print_preview.ticket_items.MarginsType.Value} marginsType
+     *     Previous margins type.
+     * @param {print_preview.Margins} customMargins Previous custom margins.
+     * @param {string} thousandsDelimeter Delimeter of the thousands place.
+     * @param {string} decimalDelimeter Delimeter of the decimal point.
+     * @param {print_preview.MeasurementSystem.UnitType} unitType Type of unit
+     *     of the local measurement system.
+     */
+    initialize: function(
+        isDocumentModifiable,
+        isDuplexEnabled,
+        isHeaderFooterEnabled,
+        marginsType,
+        customMargins,
+        thousandsDelimeter,
+        decimalDelimeter,
+        unitType) {
+
+      this.documentInfo_.isModifiable = isDocumentModifiable;
+      this.measurementSystem_.setSystem(
+          thousandsDelimeter, decimalDelimeter, unitType);
+
+      // Initialize ticket with user's previous values.
+      if (isDuplexEnabled != null) {
+        this.duplex_.updateValue(isDuplexEnabled);
+      }
+      if (isHeaderFooterEnabled != null) {
+        this.headerFooter_.updateValue(isHeaderFooterEnabled);
+      }
+      if (marginsType != null) {
+        this.marginsType_.updateValue(marginsType);
+      }
+      if (customMargins != null) {
+        this.customMargins_.updateValue(customMargins);
+      }
+    },
+
+    /**
+     * Updates the capabilities of the destination the print ticket is for.
+     * Dispatches a CAPABILITIES_CHANGE event.
+     * @param {!print_preview.ChromiumCapabilities} caps New capabilities.
+     */
+    updateDestinationCapabilities: function(caps) {
+      var isFirstUpdate = this.capabilitiesHolder_.get() == null;
+      this.capabilitiesHolder_.set(caps);
+      this.customMargins_.updateValue(null);
+      this.marginsType_.updateValue(
+          print_preview.ticket_items.MarginsType.Value.DEFAULT);
+      if (isFirstUpdate) {
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.INITIALIZE);
+      } else {
+        cr.dispatchSimpleEvent(
+            this, PrintTicketStore.EventType.CAPABILITIES_CHANGE);
+      }
+    },
+
+    /** @return {boolean} Whether the ticket store has the copies capability. */
+    hasCopiesCapability: function() {
+      return this.copies_.isCapabilityAvailable();
+    },
+
+    /**
+     * @return {boolean} Whether the string representation of the copies value
+     *     currently in the ticket store is valid.
+     */
+    isCopiesValid: function() {
+      return this.copies_.isValid();
+    },
+
+    isCopiesValidForValue: function(value) {
+      return this.copies_.wouldValueBeValid(value);
+    },
+
+    /** @return {number} Number of copies to print. */
+    getCopies: function() {
+      return this.copies_.getValueAsNumber();
+    },
+
+    /**
+     * @return {string} String representation of the number of copies to print.
+     */
+    getCopiesStr: function() {
+      return this.copies_.getValue();
+    },
+
+    /**
+     * Updates the string representation of the number of copies to print.
+     * Dispatches a TICKET_CHANGE event if the string value has changed.
+     * @param {string} New string representation of the number of copies to
+     *     print.
+     */
+    updateCopies: function(copies) {
+      if (this.copies_.getValue() != copies) {
+        this.copies_.updateValue(copies);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /** @return {boolean} Whether the ticket store has a collate capability. */
+    hasCollateCapability: function() {
+      return this.collate_.isCapabilityAvailable();
+    },
+
+    /** @return {boolean} Whether collate is enabled. */
+    isCollateEnabled: function() {
+      return this.collate_.getValue();
+    },
+
+    /**
+     * Updates whether collate is enabled. Dispatches a TICKET_CHANGE event if
+     * collate has changed.
+     * @param {boolean} isCollateEnabled Whether collate is enabled.
+     */
+    updateCollate: function(isCollateEnabled) {
+      if (this.collate_.getValue() != isCollateEnabled) {
+        this.collate_.updateValue(isCollateEnabled);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /**
+     * @return {boolean} Whether the ticket store has color printing capability.
+     */
+    hasColorCapability: function() {
+      return this.color_.isCapabilityAvailable();
+    },
+
+    /** @return {boolean} Whether color printing is enabled. */
+    isColorEnabled: function() {
+      return this.color_.getValue();
+    },
+
+    /**
+     * Updates whether color printing is enabled. Dispatches a TICKET_CHANGE if
+     * color has changed.
+     * @param {boolean} isColorEnabled Whether the color printing is enabled.
+     */
+    updateColor: function(isColorEnabled) {
+      if (this.color_.getValue() != isColorEnabled) {
+        this.color_.updateValue(isColorEnabled);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /** @return {boolean} Whether the header-footer capability is available. */
+    hasHeaderFooterCapability: function() {
+      return this.headerFooter_.isCapabilityAvailable();
+    },
+
+    /** @return {boolean} Whether the header-footer setting is enabled. */
+    isHeaderFooterEnabled: function() {
+      return this.headerFooter_.getValue();
+    },
+
+    /**
+     * Updates the whether the header-footer setting is enabled. Dispatches a
+     * TICKET_CHANGE event if the setting changed.
+     * @param {boolean} isHeaderFooterEnabled Whether the header-footer setting
+     *     is enabled.
+     */
+    updateHeaderFooter: function(isHeaderFooterEnabled) {
+      if (this.headerFooter_.getValue() != isHeaderFooterEnabled) {
+        this.headerFooter_.updateValue(isHeaderFooterEnabled);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /**
+     * @return {boolean} Whether the page orientation capability is available.
+     */
+    hasOrientationCapability: function() {
+      return this.landscape_.isCapabilityAvailable();
+    },
+
+    /**
+     * @return {boolean} Whether the document should be printed in landscape.
+     */
+    isLandscapeEnabled: function() {
+      return this.landscape_.getValue();
+    },
+
+    /**
+     * Updates whether the document should be printed in landscape. Dispatches
+     * a TICKET_CHANGE event if the setting changes.
+     * @param {boolean} isLandscapeEnabled Whether the document should be
+     *     printed in landscape.
+     */
+    updateOrientation: function(isLandscapeEnabled) {
+      if (this.landscape_.getValue() != isLandscapeEnabled) {
+        this.landscape_.updateValue(isLandscapeEnabled);
+        // Reset the user set margins.
+        this.customMargins_.updateValue(null);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /** @return {boolean} Whether the duplexing capability is available. */
+    hasDuplexCapability: function() {
+      return this.duplex_.isCapabilityAvailable();
+    },
+
+    /** @return {boolean} Whether the document should be printed in duplex. */
+    isDuplexEnabled: function() {
+      return this.duplex_.getValue();
+    },
+
+    /**
+     * Updates the duplexing setting. Dispatches a TICKET_CHANGE event if the
+     * value changes.
+     * @param {boolean} isDuplexEnabled Whether the document should be printed
+     *     in duplex.
+     */
+    updateDuplex: function(isDuplexEnabled) {
+      if (this.duplex_.getValue() != isDuplexEnabled) {
+        this.duplex_.updateValue(isDuplexEnabled);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /** @return {boolean} Whether the margins capability is available. */
+    hasMarginsCapability: function() {
+      return this.marginsType_.isCapabilityAvailable();
+    },
+
+    /**
+     * @return {print_preview.ticket_items.MarginsType.Value} Type of predefined
+     *     margins.
+     */
+    getMarginsType: function() {
+      return this.marginsType_.getValue();
+    },
+
+    /**
+     * Updates the type of predefined margins. Dispatches a TICKET_CHANGE event
+     * if the margins type changes.
+     * @param {print_preview.ticket_items.MarginsType.Value} marginsType Type of
+     *     predefined margins.
+     */
+    updateMarginsType: function(marginsType) {
+      if (this.marginsType_.getValue() != marginsType) {
+        this.marginsType_.updateValue(marginsType);
+        if (marginsType ==
+            print_preview.ticket_items.MarginsType.Value.CUSTOM) {
+          // If CUSTOM, set the value of the custom margins so that it won't be
+          // overriden by the default value.
+          this.customMargins_.updateValue(this.customMargins_.getValue());
+        }
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /** @return {boolean} Whether all of the custom margins are valid. */
+    isCustomMarginsValid: function() {
+      return this.customMargins_.isValid();
+    },
+
+    /**
+     * @return {!print_preview.Margins} Custom margins of the document in
+     *     points.
+     */
+    getCustomMargins: function() {
+      return this.customMargins_.getValue();
+    },
+
+    /**
+     * @param {print_preview.ticket_items.CustomMargins.Orientation} orientation
+     *     Specifies the margin to get the maximum value for.
+     * @return {number} Maximum value in points of the specified margin.
+     */
+    getCustomMarginMax: function(orientation) {
+      return this.customMargins_.getMarginMax(orientation);
+    },
+
+    /**
+     * Updates the custom margins of the document. Dispatches a TICKET_CHANGE
+     * event if the margins have changed.
+     * @param {!print_preview.Margins} margins New document page margins in
+     *     points.
+     */
+    updateCustomMargins: function(margins) {
+      if (!this.isCustomMarginsValid() ||
+          !margins.equals(this.getCustomMargins())) {
+        this.customMargins_.updateValue(margins);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /**
+     * Updates a single custom margin's value in points.
+     * @param {print_preview.ticket_items.CustomMargins.Orientation} orientation
+     *     Specifies the margin to update.
+     * @param {number} value Updated margin in points.
+     */
+    updateCustomMargin: function(orientation, value) {
+      if (this.customMargins_.getValue().get(orientation) != value) {
+        this.customMargins_.updateMargin(orientation, value);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /** @return {boolean} Whether the page range capability is available. */
+    hasPageRangeCapability: function() {
+      return this.pageRange_.isCapabilityAvailable();
+    },
+
+    /**
+     * @return {boolean} Whether the current page range string is defines a
+     *     valid page number set.
+     */
+    isPageRangeValid: function() {
+      return this.pageRange_.isValid();
+    },
+
+    /** @return {string} String representation of the page range. */
+    getPageRangeStr: function() {
+      return this.pageRange_.getValue();
+    },
+
+    /**
+     * @return {!print_preview.PageNumberSet} Page number set specified by the
+     *     string representation of the page range string.
+     */
+    getPageNumberSet: function() {
+      return this.pageRange_.getPageNumberSet();
+    },
+
+    /**
+     * Updates the page range string. Dispatches a TICKET_CHANGE if the string
+     * changed.
+     * @param {string} pageRangeStr New page range string.
+     */
+    updatePageRange: function(pageRangeStr) {
+      if (this.pageRange_.getValue() != pageRangeStr) {
+        this.pageRange_.updateValue(pageRangeStr);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /** @return {boolean} Whether the fit-to-page capability is available. */
+    hasFitToPageCapability: function() {
+      return this.fitToPage_.isCapabilityAvailable();
+    },
+
+    /** @return {boolean} Whether the fit-to-page capability is enabled. */
+    isFitToPageEnabled: function() {
+      return this.fitToPage_.getValue();
+    },
+
+    /**
+     * @param {boolean} isFitToPageEnabled Whether to enable the fit-to-page
+     *     capability.
+     */
+    updateFitToPage: function(isFitToPageEnabled) {
+      if (this.fitToPage_.getValue() != isFitToPageEnabled) {
+        this.fitToPage_.updateValue(isFitToPageEnabled);
+        cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.TICKET_CHANGE);
+      }
+    },
+
+    /**
+     * @return {boolean} {@code true} if the stored print ticket is valid,
+     *     {@code false} otherwise.
+     */
+    isTicketValid: function() {
+      return (!this.hasCopiesCapability() || this.isCopiesValid()) &&
+          (!this.hasPageRangeCapability() || this.isPageRangeValid()) &&
+          (!this.hasMarginsCapability() ||
+              this.getMarginsType() !=
+                  print_preview.ticket_items.MarginsType.Value.CUSTOM ||
+              this.isCustomMarginsValid());
+    }
+  };
+
+  // Export
+  return {
+    PrintTicketStore: PrintTicketStore
+  };
+});