212 lines
6.1 KiB
JavaScript
212 lines
6.1 KiB
JavaScript
(function($) {
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$.fn.connections = function(options) {
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if (options === 'update') {
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return processConnections(update, this);
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} else if (options === 'remove') {
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return processConnections(destroy, this);
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} else {
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options = $.extend(true, {
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borderClasses: {},
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'class': 'connection',
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css: {},
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from: this,
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tag: 'connection',
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to: this,
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within: ':root'
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}, options);
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connect(options);
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return this;
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}
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};
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$.event.special.connections = {
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teardown: function(namespaces) {
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processConnections(destroy, $(this));
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}
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}
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var connect = function(options) {
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var borderClasses = options.borderClasses;
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var tag = options.tag;
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var end1 = $(options.from);
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var end2 = $(options.to);
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var within = $(options.within);
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delete options.borderClasses;
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delete options.tag;
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delete options.from;
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delete options.to;
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delete options.within;
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within.each(function() {
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var container = this;
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var done = new Array();
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end1.each(function() {
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var node = this;
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done.push(this);
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end2.not(done).each(function() {
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createConnection(container, [node, this], tag, borderClasses, options);
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});
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});
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});
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};
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var createConnection = function(container, nodes, tag, borderClasses, options) {
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var css = $.extend({ position: 'absolute' }, options.css);
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var connection = $('<' + tag + '/>', options).css(css);
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connection.appendTo(container);
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var border_w = (connection.outerWidth() - connection.innerWidth()) / 2;
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var border_h = (connection.outerHeight() - connection.innerHeight()) / 2;
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if (border_w <= 0 && border_h <= 0) {
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border_w = border_h = 1;
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}
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var data = {
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borderClasses: borderClasses,
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border_h: border_h,
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border_w: border_w,
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node_from: $(nodes[0]),
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node_to: $(nodes[1]),
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nodes_dom: nodes,
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css: css
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}
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if ('none' === connection.css('border-top-style')) {
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data.css.borderStyle = 'solid';
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}
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$.data(connection.get(0), 'connection', data);
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$.data(connection.get(0), 'connections', [connection.get(0)]);
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for (var i = 0; i < 2; i++) {
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var connections = connection.add($.data(nodes[i], 'connections')).get();
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$.data(nodes[i], 'connections', connections);
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if (connections.length == 1) {
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$(nodes[i]).on('connections.connections', false);
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}
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}
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update(connection.get(0));
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};
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var destroy = function(connection) {
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var nodes = $.data(connection, 'connection').nodes_dom;
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for (var i = 0; i < 2; i++) {
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var connections = $($.data(nodes[i], 'connections')).not(connection).get();
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$.data(nodes[i], 'connections', connections);
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}
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$(connection).remove();
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};
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var getState = function(data) {
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data.rect_from = data.nodes_dom[0].getBoundingClientRect();
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data.rect_to = data.nodes_dom[1].getBoundingClientRect();
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var cached = data.cache;
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data.cache = [
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data.rect_from.top, data.rect_from.right, data.rect_from.bottom, data.rect_from.left,
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data.rect_to.top, data.rect_to.right, data.rect_to.bottom, data.rect_to.left
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];
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data.hidden = (0 === (data.cache[0] | data.cache[1] | data.cache[2] | data.cache[3])) ||
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(0 === (data.cache[4] | data.cache[5] | data.cache[6] | data.cache[7]));
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data.unmodified = true;
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if (cached === undefined) {
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return data.unmodified = false;
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}
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for (var i = 0; i < 8; i++) {
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if (cached[i] !== data.cache[i]) {
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return data.unmodified = false;
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}
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}
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}
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var update = function(connection) {
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var data = $.data(connection, 'connection');
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getState(data);
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if (data.unmodified) {
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return;
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}
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var border_h = data.border_h;
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var border_w = data.border_w;
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var from_node = data.node_from;
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var to_node = data.node_to;
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var from = data.rect_from;
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var to = data.rect_to;
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var b = (from.bottom + from.top) / 2;
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var r = (to.left + to.right) / 2;
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var t = (to.bottom + to.top) / 2;
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var l = (from.left + from.right) / 2;
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var h = ['right', 'left'];
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if (l > r) {
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h = h.reverse();
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var x = Math.max(r - border_w / 2, Math.min(from.right, to.right));
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r = l + border_w / 2;
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l = x;
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} else {
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l -= border_w / 2;
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r = Math.min(r + border_w / 2, Math.max(from.left, to.left));
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}
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var v = ['bottom', 'top'];
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if (t > b) {
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v = v.reverse();
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var x = Math.max(b - border_h / 2, Math.min(from.bottom, to.bottom));
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b = t + border_h / 2;
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t = x;
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} else {
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b = Math.min(b, Math.max(from.top, to.top));
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t -= border_h / 2;
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}
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var width = r - l;
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var height = b - t;
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if (width < border_w) {
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t = Math.max(t, Math.min(from.bottom, to.bottom));
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b = Math.min(b, Math.max(from.top, to.top));
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l = Math.max(from.left, to.left);
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r = Math.min(from.right, to.right);
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r = l = (l + r - border_w) / 2;
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}
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if (height < border_h) {
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l = Math.max(l, Math.min(from.right, to.right));
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r = Math.min(r, Math.max(from.left, to.left));
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t = Math.max(from.top, to.top);
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b = Math.min(from.bottom, to.bottom);
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b = t = (t + b - border_h) / 2;
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}
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width = r - l;
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height = b - t;
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width <= 0 && (border_h = 0);
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height <= 0 && (border_w = 0);
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var style =
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'border-' + v[0] + '-' + h[0] + '-radius: 0;' +
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'border-' + v[0] + '-' + h[1] + '-radius: 0;' +
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'border-' + v[1] + '-' + h[0] + '-radius: 0;';
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(border_h <= 0 || border_w <= 0) && (style += 'border-' + v[1] + '-' + h[1] + '-radius: 0;');
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if (data.hidden) {
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style += 'display: none;';
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} else {
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data.css['border-' + v[0] + '-width'] = 0;
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data.css['border-' + h[0] + '-width'] = 0;
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data.css['border-' + v[1] + '-width'] = border_h;
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data.css['border-' + h[1] + '-width'] = border_w;
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var current_rect = connection.getBoundingClientRect();
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data.css.left = connection.offsetLeft + l - current_rect.left;
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data.css.top = connection.offsetTop + t - current_rect.top;
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data.css.width = width - border_w;
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data.css.height = height - border_h;
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}
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var bc = data.borderClasses;
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$(connection).
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removeClass(bc[v[0]]).removeClass(bc[h[0]]).
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addClass(bc[v[1]]).addClass(bc[h[1]]).
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attr('style', style).
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css(data.css);
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}
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var processConnections = function(method, elements) {
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return elements.each(function() {
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var connections = $.data(this, 'connections');
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if (connections instanceof Array) {
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for (var i = 0, len = connections.length; i < len; i++) {
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method(connections[i]);
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}
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}
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});
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};
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})(jQuery); |