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350 lines
12 KiB
350 lines
12 KiB
/*
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* Released under BSD License
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* Copyright (c) 2014-2015 hizzgdev@163.com
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*
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* Project Home:
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* https://github.com/hizzgdev/jsmind/
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*/
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(function($w){
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'use strict';
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var $d = $w.document;
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var __name__ = 'jsMind';
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var jsMind = $w[__name__];
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if(!jsMind){return;}
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if(typeof jsMind.draggable != 'undefined'){return;}
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var jdom = jsMind.util.dom;
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var jcanvas = jsMind.util.canvas;
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var clear_selection = 'getSelection' in $w ? function(){
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$w.getSelection().removeAllRanges();
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} : function(){
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$d.selection.empty();
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};
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var options = {
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line_width : 5,
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lookup_delay : 500,
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lookup_interval : 80
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};
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jsMind.draggable = function(jm){
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this.jm = jm;
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this.e_canvas = null;
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this.canvas_ctx = null;
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this.shadow = null;
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this.shadow_w = 0;
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this.shadow_h = 0;
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this.active_node = null;
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this.target_node = null;
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this.target_direct = null;
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this.client_w = 0;
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this.client_h = 0;
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this.offset_x = 0;
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this.offset_y = 0;
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this.hlookup_delay = 0;
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this.hlookup_timer = 0;
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this.capture = false;
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this.moved = false;
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};
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jsMind.draggable.prototype = {
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init:function(){
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this._create_canvas();
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this._create_shadow();
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this._event_bind();
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},
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resize:function(){
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this.jm.view.e_nodes.appendChild(this.shadow);
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this.e_canvas.width=this.jm.view.size.w;
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this.e_canvas.height=this.jm.view.size.h;
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},
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_create_canvas:function(){
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var c = $d.createElement('canvas');
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this.jm.view.e_panel.appendChild(c);
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var ctx = c.getContext('2d');
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this.e_canvas = c;
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this.canvas_ctx = ctx;
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},
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_create_shadow:function(){
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var s = $d.createElement('jmnode');
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s.style.visibility = 'hidden';
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s.style.zIndex = '3';
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s.style.cursor = 'move';
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s.style.opacity= '0.7';
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this.shadow = s;
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},
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reset_shadow:function(el){
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var s = this.shadow.style;
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this.shadow.innerHTML = el.innerHTML;
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s.left = el.style.left;
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s.top = el.style.top;
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s.width = el.style.width;
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s.height = el.style.height;
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s.backgroundImage = el.style.backgroundImage;
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s.backgroundSize = el.style.backgroundSize;
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s.transform = el.style.transform;
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this.shadow_w = this.shadow.clientWidth;
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this.shadow_h = this.shadow.clientHeight;
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},
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show_shadow:function(){
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if(!this.moved){
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this.shadow.style.visibility = 'visible';
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}
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},
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hide_shadow:function(){
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this.shadow.style.visibility = 'hidden';
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},
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clear_lines:function(){
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jcanvas.clear(this.canvas_ctx, 0, 0, this.jm.view.size.w, this.jm.view.size.h);
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},
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_magnet_shadow:function(node){
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if(!!node){
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this.canvas_ctx.lineWidth = options.line_width;
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this.canvas_ctx.strokeStyle = 'rgba(0,0,0,0.3)';
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this.canvas_ctx.lineCap = 'round';
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this.clear_lines();
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jcanvas.lineto(this.canvas_ctx,
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node.sp.x,
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node.sp.y,
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node.np.x,
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node.np.y);
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}
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},
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_lookup_close_node:function(){
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var root = this.jm.get_root();
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var root_location = root.get_location();
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var root_size = root.get_size();
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var root_x = root_location.x + root_size.w/2;
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var sw = this.shadow_w;
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var sh = this.shadow_h;
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var sx = this.shadow.offsetLeft;
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var sy = this.shadow.offsetTop;
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var ns,nl;
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var direct = (sx + sw/2)>=root_x ?
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jsMind.direction.right : jsMind.direction.left;
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var nodes = this.jm.mind.nodes;
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var node = null;
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var min_distance = Number.MAX_VALUE;
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var distance = 0;
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var closest_node = null;
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var closest_p = null;
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var shadow_p = null;
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for(var nodeid in nodes){
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var np,sp;
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node = nodes[nodeid];
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if(node.isroot || node.direction == direct){
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if(node.id == this.active_node.id){
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continue;
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}
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ns = node.get_size();
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nl = node.get_location();
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if(direct == jsMind.direction.right){
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if(sx-nl.x-ns.w<=0){continue;}
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distance = Math.abs(sx-nl.x-ns.w) + Math.abs(sy+sh/2-nl.y-ns.h/2);
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np = {x:nl.x+ns.w-options.line_width,y:nl.y+ns.h/2};
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sp = {x:sx+options.line_width,y:sy+sh/2};
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}else{
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if(nl.x-sx-sw<=0){continue;}
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distance = Math.abs(sx+sw-nl.x) + Math.abs(sy+sh/2-nl.y-ns.h/2);
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np = {x:nl.x+options.line_width,y:nl.y+ns.h/2};
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sp = {x:sx+sw-options.line_width,y:sy+sh/2};
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}
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if(distance < min_distance){
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closest_node = node;
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closest_p = np;
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shadow_p = sp;
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min_distance = distance;
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}
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}
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}
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var result_node = null;
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if(!!closest_node){
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result_node = {
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node:closest_node,
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direction:direct,
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sp:shadow_p,
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np:closest_p
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};
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}
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return result_node;
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},
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lookup_close_node:function(){
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var node_data = this._lookup_close_node();
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if(!!node_data){
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this._magnet_shadow(node_data);
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this.target_node = node_data.node;
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this.target_direct = node_data.direction;
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}
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},
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_event_bind:function(){
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var jd = this;
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var container = this.jm.view.container;
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jdom.add_event(container,'mousedown',function(e){
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var evt = e || event;
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jd.dragstart.call(jd,evt);
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});
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jdom.add_event(container,'mousemove',function(e){
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var evt = e || event;
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jd.drag.call(jd,evt);
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});
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jdom.add_event(container,'mouseup',function(e){
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var evt = e || event;
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jd.dragend.call(jd,evt);
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});
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jdom.add_event(container,'touchstart',function(e){
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var evt = e || event;
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jd.dragstart.call(jd,evt);
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});
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jdom.add_event(container,'touchmove',function(e){
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var evt = e || event;
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jd.drag.call(jd,evt);
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});
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jdom.add_event(container,'touchend',function(e){
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var evt = e || event;
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jd.dragend.call(jd,evt);
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});
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},
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dragstart:function(e){
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if(!this.jm.get_editable()){return;}
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if(this.capture){return;}
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this.active_node = null;
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var jview = this.jm.view;
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var el = e.target || event.srcElement;
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if(el.tagName.toLowerCase() != 'jmnode'){return;}
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var nodeid = jview.get_binded_nodeid(el);
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if(!!nodeid){
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var node = this.jm.get_node(nodeid);
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if(!node.isroot){
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this.reset_shadow(el);
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this.active_node = node;
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this.offset_x = (e.clientX || e.touches[0].clientX) - el.offsetLeft;
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this.offset_y = (e.clientY || e.touches[0].clientY) - el.offsetTop;
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this.client_hw = Math.floor(el.clientWidth/2);
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this.client_hh = Math.floor(el.clientHeight/2);
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if(this.hlookup_delay != 0){
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$w.clearTimeout(this.hlookup_delay);
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}
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if(this.hlookup_timer != 0){
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$w.clearInterval(this.hlookup_timer);
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}
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var jd = this;
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this.hlookup_delay = $w.setTimeout(function(){
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jd.hlookup_delay = 0;
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jd.hlookup_timer = $w.setInterval(function(){
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jd.lookup_close_node.call(jd);
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},options.lookup_interval);
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},options.lookup_delay);
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this.capture = true;
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}
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}
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},
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drag:function(e){
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if(!this.jm.get_editable()){return;}
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if(this.capture){
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e.preventDefault();
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this.show_shadow();
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this.moved = true;
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clear_selection();
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var px = (e.clientX || e.touches[0].clientX) - this.offset_x;
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var py = (e.clientY || e.touches[0].clientY) - this.offset_y;
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var cx = px + this.client_hw;
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var cy = py + this.client_hh;
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this.shadow.style.left = px + 'px';
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this.shadow.style.top = py + 'px';
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clear_selection();
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}
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},
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dragend:function(e){
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if(!this.jm.get_editable()){return;}
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if(this.capture){
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if(this.hlookup_delay != 0){
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$w.clearTimeout(this.hlookup_delay);
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this.hlookup_delay = 0;
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this.clear_lines();
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}
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if(this.hlookup_timer != 0){
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$w.clearInterval(this.hlookup_timer);
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this.hlookup_timer = 0;
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this.clear_lines();
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}
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if(this.moved){
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var src_node = this.active_node;
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var target_node = this.target_node;
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var target_direct = this.target_direct;
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this.move_node(src_node,target_node,target_direct);
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}
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this.hide_shadow();
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}
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this.moved = false;
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this.capture = false;
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},
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move_node:function(src_node,target_node,target_direct){
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var shadow_h = this.shadow.offsetTop;
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if(!!target_node && !!src_node && !jsMind.node.inherited(src_node, target_node)){
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// lookup before_node
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var sibling_nodes = target_node.children;
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var sc = sibling_nodes.length;
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var node = null;
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var delta_y = Number.MAX_VALUE;
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var node_before = null;
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var beforeid = '_last_';
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while(sc--){
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node = sibling_nodes[sc];
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if(node.direction == target_direct && node.id != src_node.id){
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var dy = node.get_location().y - shadow_h;
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if(dy > 0 && dy < delta_y){
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delta_y = dy;
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node_before = node;
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beforeid = '_first_';
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}
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}
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}
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if(!!node_before){beforeid = node_before.id;}
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this.jm.move_node(src_node.id, beforeid, target_node.id, target_direct);
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}
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this.active_node = null;
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this.target_node = null;
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this.target_direct = null;
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},
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jm_event_handle:function(type,data){
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if(type === jsMind.event_type.resize){
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this.resize();
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}
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}
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};
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var draggable_plugin = new jsMind.plugin('draggable',function(jm){
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var jd = new jsMind.draggable(jm);
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jd.init();
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jm.add_event_listener(function(type,data){
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jd.jm_event_handle.call(jd,type,data);
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});
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});
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jsMind.register_plugin(draggable_plugin);
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})(window);
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