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summerHTMLImageMapCreator.js
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summerHTMLImageMapCreator.js
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/*
* Summer html image map creator
* http://github.com/summerstyle/summer
*
* Copyright 2016 Vera Lobacheva (http://iamvera.com)
* Released under the MIT license
*/
var summerHtmlImageMapCreator = (function() {
'use strict';
/* Utilities */
var utils = {
/**
* Returns offset from html page top-left corner for some element
*
* @param node {HTMLElement} - html element
* @returns {Object} - object with offsets, e.g. {x: 100, y: 200}
*/
getOffset : function(node) {
var boxCoords = node.getBoundingClientRect();
return {
x : Math.round(boxCoords.left + window.pageXOffset),
y : Math.round(boxCoords.top + window.pageYOffset)
};
},
/**
* Returns correct coordinates (incl. offsets)
*
* @param x {number} - x-coordinate
* @param y {number} - y-coordinate
* @returns {Object} - object with recalculated coordinates, e.g. {x: 100, y: 200}
*/
getRightCoords : function(x, y) {
return {
x : x - app.getOffset('x'),
y : y - app.getOffset('y')
};
},
/**
* TODO: will use same method of app.js
* @deprecated
*/
id : function (str) {
return document.getElementById(str);
},
/**
* TODO: will use same method of app.js
* @deprecated
*/
hide : function(node) {
node.style.display = 'none';
return this;
},
/**
* TODO: will use same method of app.js
* @deprecated
*/
show : function(node) {
node.style.display = 'block';
return this;
},
/**
* Escape < and > (for code output)
*
* @param str {string} - a string with < and >
* @returns {string} - a string with escaped < and >
*/
encode : function(str) {
return str.replace(/</g, '<').replace(/>/g, '>');
},
/**
* TODO: will use same method of app.js
* @deprecated
*/
foreach : function(arr, func) {
for(var i = 0, count = arr.length; i < count; i++) {
func(arr[i], i);
}
},
/**
* TODO: will use same method of app.js
* @deprecated
*/
foreachReverse : function(arr, func) {
for(var i = arr.length - 1; i >= 0; i--) {
func(arr[i], i);
}
},
/**
* Display debug info to some block
*/
debug : (function() {
var output = document.getElementById('debug');
return function() {
output.innerHTML = [].join.call(arguments, ' ');
};
})(),
/**
* TODO: will use same method of app.js
* @deprecated
*/
stopEvent : function(e) {
e.stopPropagation();
e.preventDefault();
return this;
},
/**
* TODO: will use same method of app.js
* @deprecated
*/
extend : function(obj, options) {
var target = {};
for (var name in obj) {
if(obj.hasOwnProperty(name)) {
target[name] = options[name] ? options[name] : obj[name];
}
}
return target;
},
inherits : (function() {
var F = function() {};
return function(Child, Parent) {
F.prototype = Parent.prototype;
Child.prototype = new F();
Child.prototype.constructor = Child;
};
})()
};
/* Main module - will be main module in app.js-based application */
var app = (function() {
var domElements = {
wrapper : utils.id('wrapper'),
svg : utils.id('svg'),
img : utils.id('img'),
container : utils.id('image'),
map : null
},
state = {
offset : {
x : 0,
y : 0
},
appMode : null, // drawing || editing || preview
currentType : null,
editType : null,
newArea : null,
selectedArea : null,
areas : [],
events : [],
isDraw : false,
image : {
src : null,
filename : null,
width: 0,
height: 0
}
},
KEYS = {
F1 : 112,
ESC : 27,
TOP : 38,
BOTTOM : 40,
LEFT : 37,
RIGHT : 39,
DELETE : 46,
I : 73,
S : 83,
C : 67
};
function recalcOffsetValues() {
state.offset = utils.getOffset(domElements.container);
}
/* Get offset value */
window.addEventListener('resize', recalcOffsetValues, false);
/* Disable selection */
domElements.container.addEventListener('mousedown', function(e) { e.preventDefault(); }, false);
/* Disable image dragging */
domElements.img.addEventListener('dragstart', function(e){
e.preventDefault();
}, false);
/* Display cursor coordinates info */
var cursor_position_info = (function() {
var coords_info = utils.id('coords');
return {
set : function(coords) {
coords_info.innerHTML = 'x: ' + coords.x + ', ' + 'y: ' + coords.y;
},
empty : function() {
coords_info.innerHTML = '';
}
};
})();
domElements.container.addEventListener('mousemove', function(e){
cursor_position_info.set(utils.getRightCoords(e.pageX, e.pageY));
}, false);
domElements.container.addEventListener('mouseleave', function(){
cursor_position_info.empty();
}, false);
/* Add mousedown event for svg */
function onSvgMousedown(e) {
if (state.appMode === 'editing') {
if (e.target.parentNode.tagName === 'g') {
info.unload();
state.selectedArea = e.target.parentNode.obj;
app.deselectAll();
state.selectedArea.select();
state.selectedArea.editingStartPoint = {
x : e.pageX,
y : e.pageY
};
if (e.target.classList.contains('helper')) {
var helper = e.target;
state.editType = helper.action;
if (helper.n >= 0) { // if typeof selected_area == polygon
state.selectedArea.selected_point = helper.n;
}
app.addEvent(app.domElements.container,
'mousemove',
state.selectedArea.onProcessEditing.bind(state.selectedArea))
.addEvent(app.domElements.container,
'mouseup',
state.selectedArea.onStopEditing.bind(state.selectedArea));
} else if (e.target.tagName === 'rect' || e.target.tagName === 'circle' || e.target.tagName === 'polygon') {
state.editType = 'move';
app.addEvent(app.domElements.container,
'mousemove',
state.selectedArea.onProcessEditing.bind(state.selectedArea))
.addEvent(app.domElements.container,
'mouseup',
state.selectedArea.onStopEditing.bind(state.selectedArea));
}
} else {
app.deselectAll();
info.unload();
}
}
}
domElements.container.addEventListener('mousedown', onSvgMousedown, false);
/* Add click event for svg */
function onSvgClick(e) {
if (state.appMode === 'drawing' && !state.isDraw && state.currentType) {
code.hide();
app.setIsDraw(true);
state.newArea = Area.CONSTRUCTORS[state.currentType].createAndStartDrawing(
utils.getRightCoords(e.pageX, e.pageY)
);
}
}
domElements.container.addEventListener('click', onSvgClick, false);
/* Add dblclick event for svg */
function onAreaDblClick(e) {
if (state.appMode === 'editing') {
if (e.target.tagName === 'rect' || e.target.tagName === 'circle' || e.target.tagName === 'polygon') {
state.selectedArea = e.target.parentNode.obj;
info.load(state.selectedArea, e.pageX, e.pageY);
}
}
}
domElements.container.addEventListener('dblclick', onAreaDblClick, false);
/* Add keydown event for document */
function onDocumentKeyDown(e) {
var ctrlDown = e.ctrlKey || e.metaKey; // PC || Mac
switch (e.keyCode) {
case KEYS.F1:
help.show();
e.preventDefault();
break;
case KEYS.ESC:
help.hide();
if (state.isDraw) {
state.isDraw = false;
state.newArea.remove();
state.areas.pop();
app.removeAllEvents();
} else if (state.appMode === 'editing') {
state.selectedArea.redraw();
app.removeAllEvents();
}
break;
case KEYS.TOP:
if (state.appMode === 'editing' && state.selectedArea) {
state.selectedArea.move(0, -1);
e.preventDefault();
}
break;
case KEYS.BOTTOM:
if (state.appMode === 'editing' && state.selectedArea) {
state.selectedArea.move(0, 1);
e.preventDefault();
}
break;
case KEYS.LEFT:
if (state.appMode === 'editing' && state.selectedArea) {
state.selectedArea.move(-1, 0);
e.preventDefault();
}
break;
case KEYS.RIGHT:
if (state.appMode === 'editing' && state.selectedArea) {
state.selectedArea.move(1, 0);
e.preventDefault();
}
break;
case KEYS.DELETE:
if (state.appMode === 'editing' && state.selectedArea) {
app.removeObject(state.selectedArea);
state.selectedArea = null;
info.unload();
}
break;
case KEYS.I:
if (state.appMode === 'editing' && state.selectedArea) {
var coordsForAttributesForm = state.selectedArea.getCoordsForDisplayingInfo();
info.load(
state.selectedArea,
coordsForAttributesForm.x + app.getOffset('x'),
coordsForAttributesForm.y + app.getOffset('y')
);
}
break;
case KEYS.S:
if (ctrlDown) {
app.saveInLocalStorage();
}
break;
case KEYS.C:
if (state.appMode === 'editing' && state.selectedArea && ctrlDown) {
state.selectedArea = Area.copy(state.selectedArea);
}
break;
}
}
document.addEventListener('keydown', onDocumentKeyDown, false);
// Will moved from the main module
var areasIO = {
toJSON : function() {
var obj = {
areas : [],
img : state.image.src
};
utils.foreach(state.areas, function(x) {
obj.areas.push(x.toJSON());
});
return JSON.stringify(obj);
},
fromJSON : function(str) {
var obj = JSON.parse(str);
app.loadImage(obj.img);
utils.foreach(obj.areas, function(areaParams) {
Area.fromJSON(areaParams);
});
}
};
// Will moved from the main module
var localStorageWrapper = (function() {
var KEY_NAME = 'SummerHTMLImageMapCreator';
return {
save : function() {
var result = areasIO.toJSON();
window.localStorage.setItem(KEY_NAME, result);
console.info('Editor ' + result + ' saved');
alert('Saved');
},
restore : function() {
areasIO.fromJSON(window.localStorage.getItem(KEY_NAME));
}
};
})();
return {
domElements : domElements,
saveInLocalStorage : localStorageWrapper.save,
loadFromLocalStorage : localStorageWrapper.restore,
hide : function() {
utils.hide(domElements.container);
return this;
},
show : function() {
utils.show(domElements.container);
return this;
},
recalcOffsetValues: function() {
recalcOffsetValues();
return this;
},
setDimensions : function(width, height) {
domElements.svg.setAttribute('width', width);
domElements.svg.setAttribute('height', height);
domElements.container.style.width = width + 'px';
domElements.container.style.height = height + 'px';
return this;
},
loadImage : function(url) {
get_image.showLoadIndicator();
domElements.img.src = url;
state.image.src = url;
domElements.img.onload = function() {
get_image.hideLoadIndicator().hide();
//
var scaleAspectRatio = calculateAspectRatioFit(domElements.img.width,domElements.img.height,1920,1080);
domElements.img.setAttribute('width', scaleAspectRatio.width);
domElements.img.setAttribute('height', scaleAspectRatio.height);
domElements.img.setAttribute('x', 800+'px');//1920-(scaleAspectRatio.width/2));
domElements.img.setAttribute('y', 1080+'px'-(scaleAspectRatio.height/2));
console.log(scaleAspectRatio);
//
app.show()
.setDimensions(1920,1080)//(domElements.img.width, domElements.img.height)
.recalcOffsetValues();
};
return this;
},
preview : (function() {
domElements.img.setAttribute('usemap', '#map');
domElements.map = document.createElement('map');
domElements.map.setAttribute('name', 'map');
domElements.container.appendChild(domElements.map);
return function() {
info.unload();
app.setShape(null);
utils.hide(domElements.svg);
domElements.map.innerHTML = app.getHTMLCode();
code.print();
return this;
};
})(),
hidePreview : function() {
utils.show(domElements.svg);
domElements.map.innerHTML = '';
return this;
},
addNodeToSvg : function(node) {
domElements.svg.appendChild(node);
return this;
},
removeNodeFromSvg : function(node) {
domElements.svg.removeChild(node);
return this;
},
getOffset : function(arg) {
switch(arg) {
case 'x':
case 'y':
return state.offset[arg];
}
},
clear : function(){
//remove all areas
state.areas.length = 0;
while(domElements.svg.childNodes[0]) {
domElements.svg.removeChild(domElements.svg.childNodes[0]);
}
code.hide();
info.unload();
return this;
},
removeObject : function(obj) {
utils.foreach(state.areas, function(x, i) {
if(x === obj) {
state.areas.splice(i, 1);
}
});
obj.remove();
return this;
},
deselectAll : function() {
utils.foreach(state.areas, function(x) {
x.deselect();
});
return this;
},
getIsDraw : function() {
return state.isDraw;
},
setIsDraw : function(arg) {
state.isDraw = arg;
return this;
},
setMode : function(arg) {
state.appMode = arg;
return this;
},
getMode : function() {
return state.appMode;
},
setShape : function(arg) {
state.currentType = arg;
return this;
},
getShape : function() {
return state.currentType;
},
addObject : function(object) {
state.areas.push(object);
return this;
},
getNewArea : function() {
return state.newArea;
},
resetNewArea : function() {
state.newArea = null;
return this;
},
getSelectedArea : function() {
return state.selectedArea;
},
setSelectedArea : function(obj) {
state.selectedArea = obj;
return this;
},
getEditType : function() {
return state.editType;
},
setFilename : function(str) {
state.image.filename = str;
return this;
},
setEditClass : function() {
domElements.container.classList.remove('draw');
domElements.container.classList.add('edit');
return this;
},
setDrawClass : function() {
domElements.container.classList.remove('edit');
domElements.container.classList.add('draw');
return this;
},
setDefaultClass : function() {
domElements.container.classList.remove('edit');
domElements.container.classList.remove('draw');
return this;
},
addEvent : function(target, eventType, func) {
state.events.push(new AppEvent(target, eventType, func));
return this;
},
removeAllEvents : function() {
utils.foreach(state.events, function(x) {
x.remove();
});
state.events.length = 0;
return this;
},
getHTMLCode : function(arg) {
var html_code = '';
if (arg) {
if (!state.areas.length) {
return '0 objects';
}
/*html_code += utils.encode('<img src="' + state.image.filename + '" alt="" usemap="#map" />') +
'<br />' + utils.encode('<map name="map">') + '<br />';*/
utils.foreachReverse(state.areas, function(x) {
html_code += ' ' + utils.encode(x.toHTMLMapElementString()) + '<br />';
});
/*html_code += utils.encode('</map>');*/
} else {
utils.foreachReverse(state.areas, function(x) {
html_code += x.toHTMLMapElementString();
});
}
return html_code;
}
};
})();
/**
* Conserve aspect ratio of the orignal region. Useful when shrinking/enlarging
* images to fit into a certain area.
*
* @param {Number} srcWidth width of source image
* @param {Number} srcHeight height of source image
* @param {Number} maxWidth maximum available width
* @param {Number} maxHeight maximum available height
* @return {Object} { width, height }
*/
function calculateAspectRatioFit(srcWidth, srcHeight, maxWidth, maxHeight) {
console.log('get aspect ratio');
var ratio = Math.min(maxWidth / srcWidth, maxHeight / srcHeight);
console.log('ratio');
return { width: srcWidth*ratio, height: srcHeight*ratio };
}
/**
* The constructor for dom events (for simple deleting of event)
*
* @constructor
* @param {DOMElement} target - DOM-element
* @param {String} eventType - e.g. 'click' or 'mousemove'
* @param {Function} func - handler for this event
*/
function AppEvent(target, eventType, func) {
this.target = target;
this.eventType = eventType;
this.func = func;
target.addEventListener(eventType, func, false);
}
/**
* Remove this event listener from target
*/
AppEvent.prototype.remove = function() {
this.target.removeEventListener(this.eventType, this.func, false);
};
/**
* The constructor of helpers points
* Helper is small svg-rectangle with some actions
*
* @constructor
* @param node {DOMElement} - a node for inserting helper
* @param x {number} - x-coordinate of helper
* @param y {number} - y-coordinate of helper
* @param action {string} - an action by click of this helper (e.g. 'move')
*/
function Helper(node, x, y, action) {
this._el = document.createElementNS(Area.SVG_NS, 'rect');
this._el.classList.add(Helper.CLASS_NAME);
this._el.setAttribute('height', Helper.SIZE);
this._el.setAttribute('width', Helper.SIZE);
this._el.setAttribute('x', x + Helper.OFFSET);
this._el.setAttribute('y', y + Helper.OFFSET);
node.appendChild(this._el);
this._el.action = action; // TODO: move 'action' from dom el to data-attr
this._el.classList.add(Helper.ACTIONS_TO_CURSORS[action]);
}
Helper.SIZE = 5;
Helper.OFFSET = -Math.ceil(Helper.SIZE / 2);
Helper.CLASS_NAME = 'helper';
Helper.ACTIONS_TO_CURSORS = {
'move' : 'move',
'editLeft' : 'e-resize',
'editRight' : 'w-resize',
'editTop' : 'n-resize',
'editBottom' : 's-resize',
'editTopLeft' : 'nw-resize',
'editTopRight' : 'ne-resize',
'editBottomLeft' : 'sw-resize',
'editBottomRight' : 'se-resize',
'movePoint' : 'pointer'
};
/**
* Set coordinates for this helper
*
* @param x {number} - x-coordinate
* @param y {number} - y-coordinate
* @returns {Helper}
*/
Helper.prototype.setCoords = function(x, y) {
this._el.setAttribute('x', x + Helper.OFFSET);
this._el.setAttribute('y', y + Helper.OFFSET);
return this;
};
/**
* Set id of this helper in list of parent's helpers
*
* @param id {number}
* @returns {Helper}
*/
Helper.prototype.setId = function(id) {
// TODO: move n-field from DOM-element to data-attribute
this._el.n = id;
return this;
};
/**
* The abstract constructor for area
*
* @constructor
* @abstract
* @param type {string} - type of area ('rectangle', 'circle' or 'polygon')
* @param coords {Object} - coordinates of area (e.g. x, y, width, height)
* @param attributes {Object} [attributes=undefined] - attributes for area (e.g. href, title)
*/
function Area(type, coords, attributes) {
if (this.constructor === Area) {
throw new Error('This is abstract class');
}
this._type = type;
/**
* @namespace
* @property href {string} - href-attribute of area
* @property alt {string} - alt-attribute of area
* @property title {string} - title-attribute of area
*/
this._attributes = {
href : '',
alt : '',
title : ''
};
if (attributes) {
this.setInfoAttributes(attributes);
}
this._coords = coords;
// the g-element, it contains this area and helpers elements
this._groupEl = document.createElementNS(Area.SVG_NS, 'g');
app.addNodeToSvg(this._groupEl);
// TODO: remove this field from DOM-element
// Link to parent object
this._groupEl.obj = this;
// svg-dom-element of area
this._el = null;
// Object with all helpers of area
this._helpers = {};
// Add this new area to list of all areas
app.addObject(this);
}
Area.SVG_NS = 'http://www.w3.org/2000/svg'; // TODO: move to main editor constructor
Area.CLASS_NAMES = {
SELECTED : 'selected',
WITH_HREF : 'with_href'
};
Area.CONSTRUCTORS = {
rectangle : Rectangle,
circle : Circle,
polygon : Polygon
};
Area.REGEXP = {
AREA : /<area(?=.*? shape="(rect|circle|poly)")(?=.*? coords="([\d ,]+?)")[\s\S]*?>/gmi,
HREF : / href="([\S\s]+?)"/,
ALT : / alt="([\S\s]+?)"/,
TITLE : / title="([\S\s]+?)"/,
DELIMETER : / ?, ?/
};
Area.HTML_NAMES_TO_AREA_NAMES = {
rect : 'rectangle',
circle : 'circle',
poly : 'polygon'
};
Area.ATTRIBUTES_NAMES = ['HREF', 'ALT', 'TITLE'];
/**
* This method should be implemented for child-classes
*
* @throws {AbstractMethodCall}
*/
Area.prototype.ABSTRACT_METHOD = function() {
throw new Error('This is abstract method');
};
/**
* All these methods are abstract
*
* @throws {AbstractMethodCall}
*/
Area.prototype.setSVGCoords =
Area.prototype.setCoords =
Area.prototype.dynamicDraw =
Area.prototype.onProcessDrawing =
Area.prototype.onStopDrawing =
Area.prototype.edit =
Area.prototype.dynamicEdit =
Area.prototype.onProcessEditing =
Area.prototype.onStopEditing =
Area.prototype.toString =
Area.prototype.toHTMLMapElementString =
Area.prototype.getCoordsForDisplayingInfo =
Area.prototype.ABSTRACT_METHOD;
/**
* Redraw this area with own or custom coordinates
*
* @param coords {Object} [coords=undefined]
* @returns {Area} - this area
*/
Area.prototype.redraw = function(coords) {
this.setSVGCoords(coords ? coords : this._coords);
return this;
};
/**
* Remove this area from DOM-tree
*/
Area.prototype.remove = function() {
app.removeNodeFromSvg(this._groupEl);
};
/**
* Move this area by dx, dy
*
* @returns {Area} - this area
*/
Area.prototype.move = function(dx, dy) {
this.setCoords(this.edit('move', dx, dy)).redraw();
return this;
};
/**
* Add class name for selected areas to this area
*
* @returns {Area} - this area
*/
Area.prototype.select = function() {
this._el.classList.add(Area.CLASS_NAMES.SELECTED);
console.info(this.toString() + ' is selected now');
return this;
};
/**
* Remove class name for selected areas from this area
*
* @returns {Area} - this area
*/
Area.prototype.deselect = function() {
this._el.classList.remove(Area.CLASS_NAMES.SELECTED);
return this;
};
/**
* Set style of element with href attribute for this area
*
* @returns {Area} - this area
*/
Area.prototype.setStyleOfElementWithHref = function() {
this._el.classList.add(Area.CLASS_NAMES.WITH_HREF);
return this;
};
/**
* Unset style of element with href attribute for this area
*
* @returns {Area} - this area
*/
Area.prototype.unsetStyleOfElementWithHref = function() {
this._el.classList.remove(Area.CLASS_NAMES.WITH_HREF);
return this;
};
/**
* Set attributes (href, alt and title) for this area
*
* @param attributes {Object} - Object with attributes for area
*/
Area.prototype.setInfoAttributes = function(attributes) {
this._attributes.href = attributes.href;
this._attributes.alt = attributes.alt;
this._attributes.title = attributes.title;
};
/**
* Returns json-representation of this area
*
* @returns {Object}
*/
Area.prototype.toJSON = function() {
/**
* @namespace
* @property type {string} - type of this area (e.g. 'rectangle', 'circle')
* @property coords {Object} - coordinates of this area (e.g. 'x', 'width')
* @property attributes {Object} - attributes of this area (e.g. 'href', 'title')
*/
return {
type : this._type,
coords : this._coords,
attributes : this._attributes
};
};
/**
* Returns new area object created with params from json-object
*
* @static
* @param params {Object} - params of area, incl. type, coords and attributes
* @returns {Rectangle|Circle|Polygon}
*/
Area.fromJSON = function(params) {
var AreaConstructor = Area.CONSTRUCTORS[params.type];
if (!AreaConstructor) {
throw new Error('This area type is not valid');
}
if (!AreaConstructor.testCoords(params.coords)) {
throw new Error('This coords is not valid for ' + params.type);
}
app.setIsDraw(true);
var area = new AreaConstructor(params.coords, params.attributes);
app.setIsDraw(false)
.resetNewArea();
return area;
};
/**
* Creates new areas from html-string with <area /> elements
*
* @param htmlStr {string}
* @returns {Array} - array with areas
*/
Area.createAreasFromHTMLOfMap = function(htmlStr) {
if (!htmlStr) {
return false;
}
while (true) {
var findedResult = Area.REGEXP.AREA.exec(htmlStr); // <area shape="$1" coords="$2" ... />