epubjs
Version:
Parse and Render Epubs
1,329 lines (1,068 loc) • 31.9 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _eventEmitter = require("event-emitter");
var _eventEmitter2 = _interopRequireDefault(_eventEmitter);
var _core = require("./utils/core");
var _epubcfi = require("./epubcfi");
var _epubcfi2 = _interopRequireDefault(_epubcfi);
var _mapping = require("./mapping");
var _mapping2 = _interopRequireDefault(_mapping);
var _replacements = require("./utils/replacements");
var _constants = require("./utils/constants");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var hasNavigator = typeof navigator !== "undefined";
var isChrome = hasNavigator && /Chrome/.test(navigator.userAgent);
var isWebkit = hasNavigator && !isChrome && /AppleWebKit/.test(navigator.userAgent);
var ELEMENT_NODE = 1;
var TEXT_NODE = 3;
/**
* Handles DOM manipulation, queries and events for View contents
* @class
* @param {document} doc Document
* @param {element} content Parent Element (typically Body)
* @param {string} cfiBase Section component of CFIs
* @param {number} sectionIndex Index in Spine of Conntent's Section
*/
var Contents = function () {
function Contents(doc, content, cfiBase, sectionIndex) {
_classCallCheck(this, Contents);
// Blank Cfi for Parsing
this.epubcfi = new _epubcfi2.default();
this.document = doc;
this.documentElement = this.document.documentElement;
this.content = content || this.document.body;
this.window = this.document.defaultView;
this._size = {
width: 0,
height: 0
};
this.sectionIndex = sectionIndex || 0;
this.cfiBase = cfiBase || "";
this.epubReadingSystem("epub.js", ePub.VERSION);
this.listeners();
}
/**
* Get DOM events that are listened for and passed along
*/
_createClass(Contents, [{
key: "width",
/**
* Get or Set width
* @param {number} [w]
* @returns {number} width
*/
value: function width(w) {
// var frame = this.documentElement;
var frame = this.content;
if (w && (0, _core.isNumber)(w)) {
w = w + "px";
}
if (w) {
frame.style.width = w;
// this.content.style.width = w;
}
return this.window.getComputedStyle(frame)["width"];
}
/**
* Get or Set height
* @param {number} [h]
* @returns {number} height
*/
}, {
key: "height",
value: function height(h) {
// var frame = this.documentElement;
var frame = this.content;
if (h && (0, _core.isNumber)(h)) {
h = h + "px";
}
if (h) {
frame.style.height = h;
// this.content.style.height = h;
}
return this.window.getComputedStyle(frame)["height"];
}
/**
* Get or Set width of the contents
* @param {number} [w]
* @returns {number} width
*/
}, {
key: "contentWidth",
value: function contentWidth(w) {
var content = this.content || this.document.body;
if (w && (0, _core.isNumber)(w)) {
w = w + "px";
}
if (w) {
content.style.width = w;
}
return this.window.getComputedStyle(content)["width"];
}
/**
* Get or Set height of the contents
* @param {number} [h]
* @returns {number} height
*/
}, {
key: "contentHeight",
value: function contentHeight(h) {
var content = this.content || this.document.body;
if (h && (0, _core.isNumber)(h)) {
h = h + "px";
}
if (h) {
content.style.height = h;
}
return this.window.getComputedStyle(content)["height"];
}
/**
* Get the width of the text using Range
* @returns {number} width
*/
}, {
key: "textWidth",
value: function textWidth() {
var width = void 0;
var range = this.document.createRange();
var content = this.content || this.document.body;
var border = (0, _core.borders)(content);
// Select the contents of frame
range.selectNodeContents(content);
// get the width of the text content
width = range.getBoundingClientRect().width;
if (border && border.width) {
width += border.width;
}
return Math.round(width);
}
/**
* Get the height of the text using Range
* @returns {number} height
*/
}, {
key: "textHeight",
value: function textHeight() {
var height = void 0;
var range = this.document.createRange();
var content = this.content || this.document.body;
var border = (0, _core.borders)(content);
range.selectNodeContents(content);
height = range.getBoundingClientRect().height;
if (height && border.height) {
height += border.height;
}
return Math.round(height);
}
/**
* Get documentElement scrollWidth
* @returns {number} width
*/
}, {
key: "scrollWidth",
value: function scrollWidth() {
var width = this.documentElement.scrollWidth;
return width;
}
/**
* Get documentElement scrollHeight
* @returns {number} height
*/
}, {
key: "scrollHeight",
value: function scrollHeight() {
var height = this.documentElement.scrollHeight;
return height;
}
/**
* Set overflow css style of the contents
* @param {string} [overflow]
*/
}, {
key: "overflow",
value: function overflow(_overflow) {
if (_overflow) {
this.documentElement.style.overflow = _overflow;
}
return this.window.getComputedStyle(this.documentElement)["overflow"];
}
/**
* Set overflowX css style of the documentElement
* @param {string} [overflow]
*/
}, {
key: "overflowX",
value: function overflowX(overflow) {
if (overflow) {
this.documentElement.style.overflowX = overflow;
}
return this.window.getComputedStyle(this.documentElement)["overflowX"];
}
/**
* Set overflowY css style of the documentElement
* @param {string} [overflow]
*/
}, {
key: "overflowY",
value: function overflowY(overflow) {
if (overflow) {
this.documentElement.style.overflowY = overflow;
}
return this.window.getComputedStyle(this.documentElement)["overflowY"];
}
/**
* Set Css styles on the contents element (typically Body)
* @param {string} property
* @param {string} value
* @param {boolean} [priority] set as "important"
*/
}, {
key: "css",
value: function css(property, value, priority) {
var content = this.content || this.document.body;
if (value) {
content.style.setProperty(property, value, priority ? "important" : "");
}
return this.window.getComputedStyle(content)[property];
}
/**
* Get or Set the viewport element
* @param {object} [options]
* @param {string} [options.width]
* @param {string} [options.height]
* @param {string} [options.scale]
* @param {string} [options.minimum]
* @param {string} [options.maximum]
* @param {string} [options.scalable]
*/
}, {
key: "viewport",
value: function viewport(options) {
var _width, _height, _scale, _minimum, _maximum, _scalable;
// var width, height, scale, minimum, maximum, scalable;
var $viewport = this.document.querySelector("meta[name='viewport']");
var parsed = {
"width": undefined,
"height": undefined,
"scale": undefined,
"minimum": undefined,
"maximum": undefined,
"scalable": undefined
};
var newContent = [];
var settings = {};
/*
* check for the viewport size
* <meta name="viewport" content="width=1024,height=697" />
*/
if ($viewport && $viewport.hasAttribute("content")) {
var content = $viewport.getAttribute("content");
var _width2 = content.match(/width\s*=\s*([^,]*)/);
var _height2 = content.match(/height\s*=\s*([^,]*)/);
var _scale2 = content.match(/initial-scale\s*=\s*([^,]*)/);
var _minimum2 = content.match(/minimum-scale\s*=\s*([^,]*)/);
var _maximum2 = content.match(/maximum-scale\s*=\s*([^,]*)/);
var _scalable2 = content.match(/user-scalable\s*=\s*([^,]*)/);
if (_width2 && _width2.length && typeof _width2[1] !== "undefined") {
parsed.width = _width2[1];
}
if (_height2 && _height2.length && typeof _height2[1] !== "undefined") {
parsed.height = _height2[1];
}
if (_scale2 && _scale2.length && typeof _scale2[1] !== "undefined") {
parsed.scale = _scale2[1];
}
if (_minimum2 && _minimum2.length && typeof _minimum2[1] !== "undefined") {
parsed.minimum = _minimum2[1];
}
if (_maximum2 && _maximum2.length && typeof _maximum2[1] !== "undefined") {
parsed.maximum = _maximum2[1];
}
if (_scalable2 && _scalable2.length && typeof _scalable2[1] !== "undefined") {
parsed.scalable = _scalable2[1];
}
}
settings = (0, _core.defaults)(options || {}, parsed);
if (options) {
if (settings.width) {
newContent.push("width=" + settings.width);
}
if (settings.height) {
newContent.push("height=" + settings.height);
}
if (settings.scale) {
newContent.push("initial-scale=" + settings.scale);
}
if (settings.scalable === "no") {
newContent.push("minimum-scale=" + settings.scale);
newContent.push("maximum-scale=" + settings.scale);
newContent.push("user-scalable=" + settings.scalable);
} else {
if (settings.scalable) {
newContent.push("user-scalable=" + settings.scalable);
}
if (settings.minimum) {
newContent.push("minimum-scale=" + settings.minimum);
}
if (settings.maximum) {
newContent.push("minimum-scale=" + settings.maximum);
}
}
if (!$viewport) {
$viewport = this.document.createElement("meta");
$viewport.setAttribute("name", "viewport");
this.document.querySelector("head").appendChild($viewport);
}
$viewport.setAttribute("content", newContent.join(", "));
this.window.scrollTo(0, 0);
}
return settings;
}
/**
* Event emitter for when the contents has expanded
* @private
*/
}, {
key: "expand",
value: function expand() {
this.emit(_constants.EVENTS.CONTENTS.EXPAND);
}
/**
* Add DOM listeners
* @private
*/
}, {
key: "listeners",
value: function listeners() {
this.imageLoadListeners();
this.mediaQueryListeners();
// this.fontLoadListeners();
this.addEventListeners();
this.addSelectionListeners();
// this.transitionListeners();
this.resizeListeners();
// this.resizeObservers();
this.linksHandler();
}
/**
* Remove DOM listeners
* @private
*/
}, {
key: "removeListeners",
value: function removeListeners() {
this.removeEventListeners();
this.removeSelectionListeners();
clearTimeout(this.expanding);
}
/**
* Check if size of contents has changed and
* emit 'resize' event if it has.
* @private
*/
}, {
key: "resizeCheck",
value: function resizeCheck() {
var width = this.textWidth();
var height = this.textHeight();
if (width != this._size.width || height != this._size.height) {
this._size = {
width: width,
height: height
};
this.onResize && this.onResize(this._size);
this.emit(_constants.EVENTS.CONTENTS.RESIZE, this._size);
}
}
/**
* Poll for resize detection
* @private
*/
}, {
key: "resizeListeners",
value: function resizeListeners() {
var width, height;
// Test size again
clearTimeout(this.expanding);
requestAnimationFrame(this.resizeCheck.bind(this));
this.expanding = setTimeout(this.resizeListeners.bind(this), 350);
}
/**
* Use css transitions to detect resize
* @private
*/
}, {
key: "transitionListeners",
value: function transitionListeners() {
var body = this.content;
body.style['transitionProperty'] = "font, font-size, font-size-adjust, font-stretch, font-variation-settings, font-weight, width, height";
body.style['transitionDuration'] = "0.001ms";
body.style['transitionTimingFunction'] = "linear";
body.style['transitionDelay'] = "0";
this.document.addEventListener('transitionend', this.resizeCheck.bind(this));
}
/**
* Listen for media query changes and emit 'expand' event
* Adapted from: https://github.com/tylergaw/media-query-events/blob/master/js/mq-events.js
* @private
*/
}, {
key: "mediaQueryListeners",
value: function mediaQueryListeners() {
var sheets = this.document.styleSheets;
var mediaChangeHandler = function (m) {
if (m.matches && !this._expanding) {
setTimeout(this.expand.bind(this), 1);
}
}.bind(this);
for (var i = 0; i < sheets.length; i += 1) {
var rules;
// Firefox errors if we access cssRules cross-domain
try {
rules = sheets[i].cssRules;
} catch (e) {
return;
}
if (!rules) return; // Stylesheets changed
for (var j = 0; j < rules.length; j += 1) {
//if (rules[j].constructor === CSSMediaRule) {
if (rules[j].media) {
var mql = this.window.matchMedia(rules[j].media.mediaText);
mql.addListener(mediaChangeHandler);
//mql.onchange = mediaChangeHandler;
}
}
}
}
/**
* Use MutationObserver to listen for changes in the DOM and check for resize
* @private
*/
}, {
key: "resizeObservers",
value: function resizeObservers() {
var _this = this;
// create an observer instance
this.observer = new MutationObserver(function (mutations) {
_this.resizeCheck();
});
// configuration of the observer:
var config = { attributes: true, childList: true, characterData: true, subtree: true };
// pass in the target node, as well as the observer options
this.observer.observe(this.document, config);
}
}, {
key: "imageLoadListeners",
value: function imageLoadListeners(target) {
var images = this.document.querySelectorAll("img");
var img;
for (var i = 0; i < images.length; i++) {
img = images[i];
if (typeof img.naturalWidth !== "undefined" && img.naturalWidth === 0) {
img.onload = this.expand.bind(this);
}
}
}
/**
* Listen for font load and check for resize when loaded
* @private
*/
}, {
key: "fontLoadListeners",
value: function fontLoadListeners(target) {
if (!this.document || !this.document.fonts) {
return;
}
this.document.fonts.ready.then(function () {
this.resizeCheck();
}.bind(this));
}
/**
* Get the documentElement
* @returns {element} documentElement
*/
}, {
key: "root",
value: function root() {
if (!this.document) return null;
return this.document.documentElement;
}
/**
* Get the location offset of a EpubCFI or an #id
* @param {string | EpubCFI} target
* @param {string} [ignoreClass] for the cfi
* @returns { {left: Number, top: Number }
*/
}, {
key: "locationOf",
value: function locationOf(target, ignoreClass) {
var position;
var targetPos = { "left": 0, "top": 0 };
if (!this.document) return targetPos;
if (this.epubcfi.isCfiString(target)) {
var range = new _epubcfi2.default(target).toRange(this.document, ignoreClass);
if (range) {
if (range.startContainer.nodeType === Node.ELEMENT_NODE) {
position = range.startContainer.getBoundingClientRect();
targetPos.left = position.left;
targetPos.top = position.top;
} else {
// Webkit does not handle collapsed range bounds correctly
// https://bugs.webkit.org/show_bug.cgi?id=138949
// Construct a new non-collapsed range
if (isWebkit) {
var container = range.startContainer;
var newRange = new Range();
try {
if (container.nodeType === ELEMENT_NODE) {
position = container.getBoundingClientRect();
} else if (range.startOffset + 2 < container.length) {
newRange.setStart(container, range.startOffset);
newRange.setEnd(container, range.startOffset + 2);
position = newRange.getBoundingClientRect();
} else if (range.startOffset - 2 > 0) {
newRange.setStart(container, range.startOffset - 2);
newRange.setEnd(container, range.startOffset);
position = newRange.getBoundingClientRect();
} else {
// empty, return the parent element
position = container.parentNode.getBoundingClientRect();
}
} catch (e) {
console.error(e, e.stack);
}
} else {
position = range.getBoundingClientRect();
}
}
}
} else if (typeof target === "string" && target.indexOf("#") > -1) {
var id = target.substring(target.indexOf("#") + 1);
var el = this.document.getElementById(id);
if (el) {
position = el.getBoundingClientRect();
}
}
if (position) {
targetPos.left = position.left;
targetPos.top = position.top;
}
return targetPos;
}
/**
* Append a stylesheet link to the document head
* @param {string} src url
*/
}, {
key: "addStylesheet",
value: function addStylesheet(src) {
return new Promise(function (resolve, reject) {
var $stylesheet;
var ready = false;
if (!this.document) {
resolve(false);
return;
}
// Check if link already exists
$stylesheet = this.document.querySelector("link[href='" + src + "']");
if ($stylesheet) {
resolve(true);
return; // already present
}
$stylesheet = this.document.createElement("link");
$stylesheet.type = "text/css";
$stylesheet.rel = "stylesheet";
$stylesheet.href = src;
$stylesheet.onload = $stylesheet.onreadystatechange = function () {
if (!ready && (!this.readyState || this.readyState == "complete")) {
ready = true;
// Let apply
setTimeout(function () {
resolve(true);
}, 1);
}
};
this.document.head.appendChild($stylesheet);
}.bind(this));
}
/**
* Append stylesheet rules to a generate stylesheet
* Array: https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleSheet/insertRule
* Object: https://github.com/desirable-objects/json-to-css
* @param {array | object} rules
*/
}, {
key: "addStylesheetRules",
value: function addStylesheetRules(rules) {
var styleEl;
var styleSheet;
var key = "epubjs-inserted-css";
if (!this.document || !rules || rules.length === 0) return;
// Check if link already exists
styleEl = this.document.getElementById("#" + key);
if (!styleEl) {
styleEl = this.document.createElement("style");
styleEl.id = key;
}
// Append style element to head
this.document.head.appendChild(styleEl);
// Grab style sheet
styleSheet = styleEl.sheet;
if (Object.prototype.toString.call(rules) === "[object Array]") {
for (var i = 0, rl = rules.length; i < rl; i++) {
var j = 1,
rule = rules[i],
selector = rules[i][0],
propStr = "";
// If the second argument of a rule is an array of arrays, correct our variables.
if (Object.prototype.toString.call(rule[1][0]) === "[object Array]") {
rule = rule[1];
j = 0;
}
for (var pl = rule.length; j < pl; j++) {
var prop = rule[j];
propStr += prop[0] + ":" + prop[1] + (prop[2] ? " !important" : "") + ";\n";
}
// Insert CSS Rule
styleSheet.insertRule(selector + "{" + propStr + "}", styleSheet.cssRules.length);
}
} else {
var selectors = Object.keys(rules);
selectors.forEach(function (selector) {
var definition = rules[selector];
if (Array.isArray(definition)) {
definition.forEach(function (item) {
var _rules = Object.keys(item);
var result = _rules.map(function (rule) {
return rule + ":" + item[rule];
}).join(';');
styleSheet.insertRule(selector + "{" + result + "}", styleSheet.cssRules.length);
});
} else {
var _rules = Object.keys(definition);
var result = _rules.map(function (rule) {
return rule + ":" + definition[rule];
}).join(';');
styleSheet.insertRule(selector + "{" + result + "}", styleSheet.cssRules.length);
}
});
}
}
/**
* Append a script tag to the document head
* @param {string} src url
* @returns {Promise} loaded
*/
}, {
key: "addScript",
value: function addScript(src) {
return new Promise(function (resolve, reject) {
var $script;
var ready = false;
if (!this.document) {
resolve(false);
return;
}
$script = this.document.createElement("script");
$script.type = "text/javascript";
$script.async = true;
$script.src = src;
$script.onload = $script.onreadystatechange = function () {
if (!ready && (!this.readyState || this.readyState == "complete")) {
ready = true;
setTimeout(function () {
resolve(true);
}, 1);
}
};
this.document.head.appendChild($script);
}.bind(this));
}
/**
* Add a class to the contents container
* @param {string} className
*/
}, {
key: "addClass",
value: function addClass(className) {
var content;
if (!this.document) return;
content = this.content || this.document.body;
if (content) {
content.classList.add(className);
}
}
/**
* Remove a class from the contents container
* @param {string} removeClass
*/
}, {
key: "removeClass",
value: function removeClass(className) {
var content;
if (!this.document) return;
content = this.content || this.document.body;
if (content) {
content.classList.remove(className);
}
}
/**
* Add DOM event listeners
* @private
*/
}, {
key: "addEventListeners",
value: function addEventListeners() {
if (!this.document) {
return;
}
_constants.DOM_EVENTS.forEach(function (eventName) {
this.document.addEventListener(eventName, this.triggerEvent.bind(this), false);
}, this);
}
/**
* Remove DOM event listeners
* @private
*/
}, {
key: "removeEventListeners",
value: function removeEventListeners() {
if (!this.document) {
return;
}
_constants.DOM_EVENTS.forEach(function (eventName) {
this.document.removeEventListener(eventName, this.triggerEvent, false);
}, this);
}
/**
* Emit passed browser events
* @private
*/
}, {
key: "triggerEvent",
value: function triggerEvent(e) {
this.emit(e.type, e);
}
/**
* Add listener for text selection
* @private
*/
}, {
key: "addSelectionListeners",
value: function addSelectionListeners() {
if (!this.document) {
return;
}
this.document.addEventListener("selectionchange", this.onSelectionChange.bind(this), false);
}
/**
* Remove listener for text selection
* @private
*/
}, {
key: "removeSelectionListeners",
value: function removeSelectionListeners() {
if (!this.document) {
return;
}
this.document.removeEventListener("selectionchange", this.onSelectionChange, false);
}
/**
* Handle getting text on selection
* @private
*/
}, {
key: "onSelectionChange",
value: function onSelectionChange(e) {
if (this.selectionEndTimeout) {
clearTimeout(this.selectionEndTimeout);
}
this.selectionEndTimeout = setTimeout(function () {
var selection = this.window.getSelection();
this.triggerSelectedEvent(selection);
}.bind(this), 250);
}
/**
* Emit event on text selection
* @private
*/
}, {
key: "triggerSelectedEvent",
value: function triggerSelectedEvent(selection) {
var range, cfirange;
if (selection && selection.rangeCount > 0) {
range = selection.getRangeAt(0);
if (!range.collapsed) {
// cfirange = this.section.cfiFromRange(range);
cfirange = new _epubcfi2.default(range, this.cfiBase).toString();
this.emit(_constants.EVENTS.CONTENTS.SELECTED, cfirange);
this.emit(_constants.EVENTS.CONTENTS.SELECTED_RANGE, range);
}
}
}
/**
* Get a Dom Range from EpubCFI
* @param {EpubCFI} _cfi
* @param {string} [ignoreClass]
* @returns {Range} range
*/
}, {
key: "range",
value: function range(_cfi, ignoreClass) {
var cfi = new _epubcfi2.default(_cfi);
return cfi.toRange(this.document, ignoreClass);
}
/**
* Get an EpubCFI from a Dom Range
* @param {Range} range
* @param {string} [ignoreClass]
* @returns {EpubCFI} cfi
*/
}, {
key: "cfiFromRange",
value: function cfiFromRange(range, ignoreClass) {
return new _epubcfi2.default(range, this.cfiBase, ignoreClass).toString();
}
/**
* Get an EpubCFI from a Dom node
* @param {node} node
* @param {string} [ignoreClass]
* @returns {EpubCFI} cfi
*/
}, {
key: "cfiFromNode",
value: function cfiFromNode(node, ignoreClass) {
return new _epubcfi2.default(node, this.cfiBase, ignoreClass).toString();
}
// TODO: find where this is used - remove?
}, {
key: "map",
value: function map(layout) {
var map = new _mapping2.default(layout);
return map.section();
}
/**
* Size the contents to a given width and height
* @param {number} [width]
* @param {number} [height]
*/
}, {
key: "size",
value: function size(width, height) {
var viewport = { scale: 1.0, scalable: "no" };
this.layoutStyle("scrolling");
if (width >= 0) {
this.width(width);
viewport.width = width;
this.css("padding", "0 " + width / 12 + "px");
}
if (height >= 0) {
this.height(height);
viewport.height = height;
}
this.css("margin", "0");
this.css("box-sizing", "border-box");
this.viewport(viewport);
}
/**
* Apply columns to the contents for pagination
* @param {number} width
* @param {number} height
* @param {number} columnWidth
* @param {number} gap
*/
}, {
key: "columns",
value: function columns(width, height, columnWidth, gap) {
var COLUMN_AXIS = (0, _core.prefixed)("column-axis");
var COLUMN_GAP = (0, _core.prefixed)("column-gap");
var COLUMN_WIDTH = (0, _core.prefixed)("column-width");
var COLUMN_FILL = (0, _core.prefixed)("column-fill");
var writingMode = this.writingMode();
var axis = writingMode.indexOf("vertical") === 0 ? "vertical" : "horizontal";
this.layoutStyle("paginated");
// Fix body width issues if rtl is only set on body element
if (this.content.dir === "rtl") {
this.direction("rtl");
}
this.width(width);
this.height(height);
// Deal with Mobile trying to scale to viewport
this.viewport({ width: width, height: height, scale: 1.0, scalable: "no" });
// TODO: inline-block needs more testing
// Fixes Safari column cut offs, but causes RTL issues
// this.css("display", "inline-block");
this.css("overflow-y", "hidden");
this.css("margin", "0", true);
if (axis === "vertical") {
this.css("padding-top", gap / 2 + "px", true);
this.css("padding-bottom", gap / 2 + "px", true);
this.css("padding-left", "20px");
this.css("padding-right", "20px");
} else {
this.css("padding-top", "20px");
this.css("padding-bottom", "20px");
this.css("padding-left", gap / 2 + "px", true);
this.css("padding-right", gap / 2 + "px", true);
}
this.css("box-sizing", "border-box");
this.css("max-width", "inherit");
this.css(COLUMN_AXIS, "horizontal");
this.css(COLUMN_FILL, "auto");
this.css(COLUMN_GAP, gap + "px");
this.css(COLUMN_WIDTH, columnWidth + "px");
}
/**
* Scale contents from center
* @param {number} scale
* @param {number} offsetX
* @param {number} offsetY
*/
}, {
key: "scaler",
value: function scaler(scale, offsetX, offsetY) {
var scaleStr = "scale(" + scale + ")";
var translateStr = "";
// this.css("position", "absolute"));
this.css("transform-origin", "top left");
if (offsetX >= 0 || offsetY >= 0) {
translateStr = " translate(" + (offsetX || 0) + "px, " + (offsetY || 0) + "px )";
}
this.css("transform", scaleStr + translateStr);
}
/**
* Fit contents into a fixed width and height
* @param {number} width
* @param {number} height
*/
}, {
key: "fit",
value: function fit(width, height) {
var viewport = this.viewport();
var widthScale = width / parseInt(viewport.width);
var heightScale = height / parseInt(viewport.height);
var scale = widthScale < heightScale ? widthScale : heightScale;
var offsetY = (height - viewport.height * scale) / 2;
this.layoutStyle("paginated");
this.width(width);
this.height(height);
this.overflow("hidden");
// Scale to the correct size
this.scaler(scale, 0, offsetY);
this.css("background-color", "transparent");
}
/**
* Set the direction of the text
* @param {string} [dir="ltr"] "rtl" | "ltr"
*/
}, {
key: "direction",
value: function direction(dir) {
if (this.documentElement) {
this.documentElement.style["direction"] = dir;
}
}
}, {
key: "mapPage",
value: function mapPage(cfiBase, layout, start, end, dev) {
var mapping = new _mapping2.default(layout, dev);
return mapping.page(this, cfiBase, start, end);
}
/**
* Emit event when link in content is clicked
* @private
*/
}, {
key: "linksHandler",
value: function linksHandler() {
var _this2 = this;
(0, _replacements.replaceLinks)(this.content, function (href) {
_this2.emit(_constants.EVENTS.CONTENTS.LINK_CLICKED, href);
});
}
/**
* Set the writingMode of the text
* @param {string} [mode="horizontal-tb"] "horizontal-tb" | "vertical-rl" | "vertical-lr"
*/
}, {
key: "writingMode",
value: function writingMode(mode) {
var WRITING_MODE = (0, _core.prefixed)("writing-mode");
if (mode && this.documentElement) {
this.documentElement.style[WRITING_MODE] = mode;
}
return this.window.getComputedStyle(this.documentElement)[WRITING_MODE] || '';
}
/**
* Set the layoutStyle of the content
* @param {string} [style="paginated"] "scrolling" | "paginated"
* @private
*/
}, {
key: "layoutStyle",
value: function layoutStyle(style) {
if (style) {
this._layoutStyle = style;
navigator.epubReadingSystem.layoutStyle = this._layoutStyle;
}
return this._layoutStyle || "paginated";
}
/**
* Add the epubReadingSystem object to the navigator
* @param {string} name
* @param {string} version
* @private
*/
}, {
key: "epubReadingSystem",
value: function epubReadingSystem(name, version) {
navigator.epubReadingSystem = {
name: name,
version: version,
layoutStyle: this.layoutStyle(),
hasFeature: function hasFeature(feature) {
switch (feature) {
case "dom-manipulation":
return true;
case "layout-changes":
return true;
case "touch-events":
return true;
case "mouse-events":
return true;
case "keyboard-events":
return true;
case "spine-scripting":
return false;
default:
return false;
}
}
};
return navigator.epubReadingSystem;
}
}, {
key: "destroy",
value: function destroy() {
// Stop observing
if (this.observer) {
this.observer.disconnect();
}
this.document.removeEventListener('transitionend', this.resizeCheck);
this.removeListeners();
}
}], [{
key: "listenedEvents",
get: function get() {
return _constants.DOM_EVENTS;
}
}]);
return Contents;
}();
(0, _eventEmitter2.default)(Contents.prototype);
exports.default = Contents;
module.exports = exports["default"];