File: //home/arjun/projects/buyercall/node_modules/svg.resize.js/dist/svg.resize.js
/*!
* svg.resize.js - An extension for svg.js which allows to resize elements which are selected
* @version 1.4.3
* https://github.com/svgdotjs/svg.resize.js
*
* @copyright [object Object]
* @license MIT
*/;
;(function() {
"use strict";
;(function () {
function ResizeHandler(el) {
el.remember('_resizeHandler', this);
this.el = el;
this.parameters = {};
this.lastUpdateCall = null;
this.p = el.doc().node.createSVGPoint();
}
ResizeHandler.prototype.transformPoint = function(x, y, m){
this.p.x = x - (this.offset.x - window.pageXOffset);
this.p.y = y - (this.offset.y - window.pageYOffset);
return this.p.matrixTransform(m || this.m);
};
ResizeHandler.prototype._extractPosition = function(event) {
// Extract a position from a mouse/touch event.
// Returns { x: .., y: .. }
return {
x: event.clientX != null ? event.clientX : event.touches[0].clientX,
y: event.clientY != null ? event.clientY : event.touches[0].clientY
}
};
ResizeHandler.prototype.init = function (options) {
var _this = this;
this.stop();
if (options === 'stop') {
return;
}
this.options = {};
// Merge options and defaults
for (var i in this.el.resize.defaults) {
this.options[i] = this.el.resize.defaults[i];
if (typeof options[i] !== 'undefined') {
this.options[i] = options[i];
}
}
// We listen to all these events which are specifying different edges
this.el.on('lt.resize', function(e){ _this.resize(e || window.event); }); // Left-Top
this.el.on('rt.resize', function(e){ _this.resize(e || window.event); }); // Right-Top
this.el.on('rb.resize', function(e){ _this.resize(e || window.event); }); // Right-Bottom
this.el.on('lb.resize', function(e){ _this.resize(e || window.event); }); // Left-Bottom
this.el.on('t.resize', function(e){ _this.resize(e || window.event); }); // Top
this.el.on('r.resize', function(e){ _this.resize(e || window.event); }); // Right
this.el.on('b.resize', function(e){ _this.resize(e || window.event); }); // Bottom
this.el.on('l.resize', function(e){ _this.resize(e || window.event); }); // Left
this.el.on('rot.resize', function(e){ _this.resize(e || window.event); }); // Rotation
this.el.on('point.resize', function(e){ _this.resize(e || window.event); }); // Point-Moving
// This call ensures, that the plugin reacts to a change of snapToGrid immediately
this.update();
};
ResizeHandler.prototype.stop = function(){
this.el.off('lt.resize');
this.el.off('rt.resize');
this.el.off('rb.resize');
this.el.off('lb.resize');
this.el.off('t.resize');
this.el.off('r.resize');
this.el.off('b.resize');
this.el.off('l.resize');
this.el.off('rot.resize');
this.el.off('point.resize');
return this;
};
ResizeHandler.prototype.resize = function (event) {
var _this = this;
this.m = this.el.node.getScreenCTM().inverse();
this.offset = { x: window.pageXOffset, y: window.pageYOffset };
var txPt = this._extractPosition(event.detail.event);
this.parameters = {
type: this.el.type, // the type of element
p: this.transformPoint(txPt.x, txPt.y),
x: event.detail.x, // x-position of the mouse when resizing started
y: event.detail.y, // y-position of the mouse when resizing started
box: this.el.bbox(), // The bounding-box of the element
rotation: this.el.transform().rotation // The current rotation of the element
};
// Add font-size parameter if the element type is text
if (this.el.type === "text") {
this.parameters.fontSize = this.el.attr()["font-size"];
}
// the i-param in the event holds the index of the point which is moved, when using `deepSelect`
if (event.detail.i !== undefined) {
// get the point array
var array = this.el.array().valueOf();
// Save the index and the point which is moved
this.parameters.i = event.detail.i;
this.parameters.pointCoords = [array[event.detail.i][0], array[event.detail.i][1]];
}
// Lets check which edge of the bounding-box was clicked and resize the this.el according to this
switch (event.type) {
// Left-Top-Edge
case 'lt':
// We build a calculating function for every case which gives us the new position of the this.el
this.calc = function (diffX, diffY) {
// The procedure is always the same
// First we snap the edge to the given grid (snapping to 1px grid is normal resizing)
var snap = this.snapToGrid(diffX, diffY);
// Now we check if the new height and width still valid (> 0)
if (this.parameters.box.width - snap[0] > 0 && this.parameters.box.height - snap[1] > 0) {
// ...if valid, we resize the this.el (which can include moving because the coord-system starts at the left-top and this edge is moving sometimes when resized)
/*
* but first check if the element is text box, so we can change the font size instead of
* the width and height
*/
if (this.parameters.type === "text") {
this.el.move(this.parameters.box.x + snap[0], this.parameters.box.y);
this.el.attr("font-size", this.parameters.fontSize - snap[0]);
return;
}
snap = this.checkAspectRatio(snap);
this.el.move(this.parameters.box.x + snap[0], this.parameters.box.y + snap[1]).size(this.parameters.box.width - snap[0], this.parameters.box.height - snap[1]);
}
};
break;
// Right-Top
case 'rt':
// s.a.
this.calc = function (diffX, diffY) {
var snap = this.snapToGrid(diffX, diffY, 1 << 1);
if (this.parameters.box.width + snap[0] > 0 && this.parameters.box.height - snap[1] > 0) {
if (this.parameters.type === "text") {
this.el.move(this.parameters.box.x - snap[0], this.parameters.box.y);
this.el.attr("font-size", this.parameters.fontSize + snap[0]);
return;
}
snap = this.checkAspectRatio(snap, true);
this.el.move(this.parameters.box.x, this.parameters.box.y + snap[1]).size(this.parameters.box.width + snap[0], this.parameters.box.height - snap[1]);
}
};
break;
// Right-Bottom
case 'rb':
// s.a.
this.calc = function (diffX, diffY) {
var snap = this.snapToGrid(diffX, diffY, 0);
if (this.parameters.box.width + snap[0] > 0 && this.parameters.box.height + snap[1] > 0) {
if (this.parameters.type === "text") {
this.el.move(this.parameters.box.x - snap[0], this.parameters.box.y);
this.el.attr("font-size", this.parameters.fontSize + snap[0]);
return;
}
snap = this.checkAspectRatio(snap);
this.el.move(this.parameters.box.x, this.parameters.box.y).size(this.parameters.box.width + snap[0], this.parameters.box.height + snap[1]);
}
};
break;
// Left-Bottom
case 'lb':
// s.a.
this.calc = function (diffX, diffY) {
var snap = this.snapToGrid(diffX, diffY, 1);
if (this.parameters.box.width - snap[0] > 0 && this.parameters.box.height + snap[1] > 0) {
if (this.parameters.type === "text") {
this.el.move(this.parameters.box.x + snap[0], this.parameters.box.y);
this.el.attr("font-size", this.parameters.fontSize - snap[0]);
return;
}
snap = this.checkAspectRatio(snap, true);
this.el.move(this.parameters.box.x + snap[0], this.parameters.box.y).size(this.parameters.box.width - snap[0], this.parameters.box.height + snap[1]);
}
};
break;
// Top
case 't':
// s.a.
this.calc = function (diffX, diffY) {
var snap = this.snapToGrid(diffX, diffY, 1 << 1);
if (this.parameters.box.height - snap[1] > 0) {
// Disable the font-resizing if it is not from the corner of bounding-box
if (this.parameters.type === "text") {
return;
}
this.el.move(this.parameters.box.x, this.parameters.box.y + snap[1]).height(this.parameters.box.height - snap[1]);
}
};
break;
// Right
case 'r':
// s.a.
this.calc = function (diffX, diffY) {
var snap = this.snapToGrid(diffX, diffY, 0);
if (this.parameters.box.width + snap[0] > 0) {
if (this.parameters.type === "text") {
return;
}
this.el.move(this.parameters.box.x, this.parameters.box.y).width(this.parameters.box.width + snap[0]);
}
};
break;
// Bottom
case 'b':
// s.a.
this.calc = function (diffX, diffY) {
var snap = this.snapToGrid(diffX, diffY, 0);
if (this.parameters.box.height + snap[1] > 0) {
if (this.parameters.type === "text") {
return;
}
this.el.move(this.parameters.box.x, this.parameters.box.y).height(this.parameters.box.height + snap[1]);
}
};
break;
// Left
case 'l':
// s.a.
this.calc = function (diffX, diffY) {
var snap = this.snapToGrid(diffX, diffY, 1);
if (this.parameters.box.width - snap[0] > 0) {
if (this.parameters.type === "text") {
return;
}
this.el.move(this.parameters.box.x + snap[0], this.parameters.box.y).width(this.parameters.box.width - snap[0]);
}
};
break;
// Rotation
case 'rot':
// s.a.
this.calc = function (diffX, diffY) {
// yes this is kinda stupid but we need the mouse coords back...
var current = {x: diffX + this.parameters.p.x, y: diffY + this.parameters.p.y};
// start minus middle
var sAngle = Math.atan2((this.parameters.p.y - this.parameters.box.y - this.parameters.box.height / 2), (this.parameters.p.x - this.parameters.box.x - this.parameters.box.width / 2));
// end minus middle
var pAngle = Math.atan2((current.y - this.parameters.box.y - this.parameters.box.height / 2), (current.x - this.parameters.box.x - this.parameters.box.width / 2));
var angle = this.parameters.rotation + (pAngle - sAngle) * 180 / Math.PI + this.options.snapToAngle / 2;
// We have to move the element to the center of the box first and change the rotation afterwards
// because rotation always works around a rotation-center, which is changed when moving the element
// We also set the new rotation center to the center of the box.
this.el.center(this.parameters.box.cx, this.parameters.box.cy).rotate(angle - (angle % this.options.snapToAngle), this.parameters.box.cx, this.parameters.box.cy);
};
break;
// Moving one single Point (needed when an element is deepSelected which means you can move every single point of the object)
case 'point':
this.calc = function (diffX, diffY) {
// Snapping the point to the grid
var snap = this.snapToGrid(diffX, diffY, this.parameters.pointCoords[0], this.parameters.pointCoords[1]);
// Get the point array
var array = this.el.array().valueOf();
// Changing the moved point in the array
array[this.parameters.i][0] = this.parameters.pointCoords[0] + snap[0];
array[this.parameters.i][1] = this.parameters.pointCoords[1] + snap[1];
// And plot the new this.el
this.el.plot(array);
};
}
this.el.fire('resizestart', {dx: this.parameters.x, dy: this.parameters.y, event: event});
// When resizing started, we have to register events for...
// Touches.
SVG.on(window, 'touchmove.resize', function(e) {
_this.update(e || window.event);
});
SVG.on(window, 'touchend.resize', function() {
_this.done();
});
// Mouse.
SVG.on(window, 'mousemove.resize', function (e) {
_this.update(e || window.event);
});
SVG.on(window, 'mouseup.resize', function () {
_this.done();
});
};
// The update-function redraws the element every time the mouse is moving
ResizeHandler.prototype.update = function (event) {
if (!event) {
if (this.lastUpdateCall) {
this.calc(this.lastUpdateCall[0], this.lastUpdateCall[1]);
}
return;
}
// Calculate the difference between the mouseposition at start and now
var txPt = this._extractPosition(event);
var p = this.transformPoint(txPt.x, txPt.y);
var diffX = p.x - this.parameters.p.x,
diffY = p.y - this.parameters.p.y;
this.lastUpdateCall = [diffX, diffY];
// Calculate the new position and height / width of the element
this.calc(diffX, diffY);
// Emit an event to say we have changed.
this.el.fire('resizing', {dx: diffX, dy: diffY, event: event});
};
// Is called on mouseup.
// Removes the update-function from the mousemove event
ResizeHandler.prototype.done = function () {
this.lastUpdateCall = null;
SVG.off(window, 'mousemove.resize');
SVG.off(window, 'mouseup.resize');
SVG.off(window, 'touchmove.resize');
SVG.off(window, 'touchend.resize');
this.el.fire('resizedone');
};
// The flag is used to determine whether the resizing is used with a left-Point (first bit) and top-point (second bit)
// In this cases the temp-values are calculated differently
ResizeHandler.prototype.snapToGrid = function (diffX, diffY, flag, pointCoordsY) {
var temp;
// If `pointCoordsY` is given, a single Point has to be snapped (deepSelect). That's why we need a different temp-value
if (typeof pointCoordsY !== 'undefined') {
// Note that flag = pointCoordsX in this case
temp = [(flag + diffX) % this.options.snapToGrid, (pointCoordsY + diffY) % this.options.snapToGrid];
} else {
// We check if the flag is set and if not we set a default-value (both bits set - which means upper-left-edge)
flag = flag == null ? 1 | 1 << 1 : flag;
temp = [(this.parameters.box.x + diffX + (flag & 1 ? 0 : this.parameters.box.width)) % this.options.snapToGrid, (this.parameters.box.y + diffY + (flag & (1 << 1) ? 0 : this.parameters.box.height)) % this.options.snapToGrid];
}
if(diffX < 0) {
temp[0] -= this.options.snapToGrid;
}
if(diffY < 0) {
temp[1] -= this.options.snapToGrid;
}
diffX -= (Math.abs(temp[0]) < this.options.snapToGrid / 2 ?
temp[0] :
temp[0] - (diffX < 0 ? -this.options.snapToGrid : this.options.snapToGrid));
diffY -= (Math.abs(temp[1]) < this.options.snapToGrid / 2 ?
temp[1] :
temp[1] - (diffY < 0 ? -this.options.snapToGrid : this.options.snapToGrid));
return this.constraintToBox(diffX, diffY, flag, pointCoordsY);
};
// keep element within constrained box
ResizeHandler.prototype.constraintToBox = function (diffX, diffY, flag, pointCoordsY) {
//return [diffX, diffY]
var c = this.options.constraint || {};
var orgX, orgY;
if (typeof pointCoordsY !== 'undefined') {
orgX = flag;
orgY = pointCoordsY;
} else {
orgX = this.parameters.box.x + (flag & 1 ? 0 : this.parameters.box.width);
orgY = this.parameters.box.y + (flag & (1<<1) ? 0 : this.parameters.box.height);
}
if (typeof c.minX !== 'undefined' && orgX + diffX < c.minX) {
diffX = c.minX - orgX;
}
if (typeof c.maxX !== 'undefined' && orgX + diffX > c.maxX) {
diffX = c.maxX - orgX;
}
if (typeof c.minY !== 'undefined' && orgY + diffY < c.minY) {
diffY = c.minY - orgY;
}
if (typeof c.maxY !== 'undefined' && orgY + diffY > c.maxY) {
diffY = c.maxY - orgY;
}
return [diffX, diffY];
};
ResizeHandler.prototype.checkAspectRatio = function (snap, isReverse) {
if (!this.options.saveAspectRatio) {
return snap;
}
var updatedSnap = snap.slice();
var aspectRatio = this.parameters.box.width / this.parameters.box.height;
var newW = this.parameters.box.width + snap[0];
var newH = this.parameters.box.height - snap[1];
var newAspectRatio = newW / newH;
if (newAspectRatio < aspectRatio) {
// Height is too big. Adapt it
updatedSnap[1] = newW / aspectRatio - this.parameters.box.height;
isReverse && (updatedSnap[1] = -updatedSnap[1]);
} else if (newAspectRatio > aspectRatio) {
// Width is too big. Adapt it
updatedSnap[0] = this.parameters.box.width - newH * aspectRatio;
isReverse && (updatedSnap[0] = -updatedSnap[0]);
}
return updatedSnap;
};
SVG.extend(SVG.Element, {
// Resize element with mouse
resize: function (options) {
(this.remember('_resizeHandler') || new ResizeHandler(this)).init(options || {});
return this;
}
});
SVG.Element.prototype.resize.defaults = {
snapToAngle: 0.1, // Specifies the speed the rotation is happening when moving the mouse
snapToGrid: 1, // Snaps to a grid of `snapToGrid` Pixels
constraint: {}, // keep element within constrained box
saveAspectRatio: false // Save aspect ratio when resizing using lt, rt, rb or lb points
};
}).call(this);
}());