planetlab/slices/leases.js

   1 /* need to put some place else in CSS ? */
   2
   3
   4 /* decorations / headers */
   5
   6 var txt_nodename = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#008"};
   7 var txt_timeslot = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#008"};
   8 var attr_rules={'fill':"#888", 'stroke-dasharray':'- ', 'stroke-width':0.5};
   9 var x_nodename = 200;
  10 var x_sep=10;
  11 var y_header = 12
  12 var y_sep = 20
  13
  14 /* lease dimensions and colors */
  15 var anim_delay=500;
  16 var x_grain = 24;
  17 var y_node = 15;
  18 var radius= 6;
  19 /* lease was originally free and is still free */
  20 var attr_lease_free_free={'fill':"#def", 'stroke-width':0.5, 'stroke-dasharray':''};
  21 /* lease was originally free and is now set for our usage */
  22 var attr_lease_free_mine={'fill':"green", 'stroke-width':1, 'stroke-dasharray':'-..'};
  23 /* was mine and is still mine */
  24 var attr_lease_mine_mine={'fill':"#beb", 'stroke-width':0.5, 'stroke-dasharray':''};
  25 /* was mine and is about to be released */
  26 var attr_lease_mine_free={'fill':"white", 'stroke-width':1, 'stroke-dasharray':'-..'};
  27 // refrained from using gradient color, was not animated properly
  28 // var color_lease_mine_free="0-#fff-#def:50-#fff";
  29 var attr_lease_other={'fill':"#f88"};
  30
  31 /* other slices name */
  32 var txt_slice = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#444",
  33                  "font-size": 15 };
  34
  35 ////////////////////////////////////////////////////////////
  36 // the scheduler object
  37 function Scheduler (slicename, axisx, axisy, data) {
  38
  39     this.slicename=slicename;
  40     this.axisx=axisx;
  41     this.axisy=axisy;
  42     this.data=data;
  43
  44     // utilities to keep track of all the leases
  45     this.leases=[];
  46     this.append_lease = function (lease) {
  47         this.leases.push(lease);
  48     }
  49
  50     // how many time slots
  51     this.nb_grains = function () { return axisx.length;}
  52
  53     this.init = function (id) {
  54         this.total_width = x_nodename + this.nb_grains()*x_grain;
  55         this.total_height = 2*y_header + this.axisy.length*(y_node+y_sep);
  56         paper = Raphael (id, this.total_width, this.total_height);
  57
  58         // create the time slots legend
  59         var top=0;
  60         var left=x_nodename;
  61
  62         var col=0;
  63         for (var i=0, len=axisx.length; i < len; ++i) {
  64             // pick the printable part
  65             timeslot=axisx[i][1];
  66             var y = top+y_header;
  67             if (col%2 == 0) y += y_header;
  68             col +=1;
  69             var timelabel=paper.text(left,y,timeslot).attr(txt_timeslot)
  70                 .attr({"font-size":y_header, "text-anchor":"middle"});
  71             var path_spec="M"+left+" "+(y+y_header/2)+"L"+left+" "+this.total_height;
  72             var rule=paper.path(path_spec).attr(attr_rules);
  73             left+=x_grain;
  74         }
  75
  76         // move to the lines below:
  77         top += 2*y_header+y_sep;
  78
  79         var data_index=0;
  80         for (var i=0, len=axisy.length; i<len; ++i) {
  81             node=axisy[i];
  82             left=0;
  83             var nodelabel = paper.text(x_nodename-x_sep,top+y_node/2,node).attr(txt_nodename)
  84                 .attr ({"font-size":y_node, "text-anchor":"end","baseline":"bottom"});
  85
  86             left += x_nodename;
  87             var grain=0;
  88             while (grain < this.nb_grains()) {
  89                 slicename=data[data_index][0];
  90                 duration=data[data_index][1];
  91                 var lease=paper.rect (left,top,x_grain*duration,y_node,radius);
  92                 lease.nodename=node;
  93                 if (slicename == "") {
  94                     lease.initial="free";
  95                     lease_methods.init_free(lease);
  96                 } else if (slicename == this.slicename) {
  97                     lease.initial="mine";
  98                     lease_methods.init_mine(lease);
  99                 } else {
 100                     lease_initial="other";
 101                     lease_methods.init_other(lease,slicename);
 102                 }
 103                 lease.from_time = axisx[grain%this.nb_grains()][0];
 104                 grain += duration;
 105                 lease.until_time = axisx[grain%this.nb_grains()][0];
 106                 // record scheduler in lease
 107                 lease.scheduler=this;
 108                 // and vice versa
 109                 this.append_lease(lease);
 110                 // move on with the loop
 111                 left += x_grain*duration;
 112                 data_index +=1;
 113             }
 114             top += y_node + y_sep;
 115         };
 116     }
 117
 118     this.submit = function () {
 119         for (var i=0, len=this.leases.length; i<len; ++i) {
 120             var lease=this.leases[i];
 121             if (lease.current != lease.initial) {
 122                 var from_time=lease.from_time;
 123                 var until_time=lease.until_time;
 124                 /* scan the leases just after this one and merge if appropriate */
 125                 var j=i+1;
 126                 while (j<len && lease_methods.compare (lease, until_time, this.leases[j])) {
 127                     window.console.log('merged index='+j);
 128                     until_time=this.leases[j].until_time;
 129                     ++j; ++i;
 130                 }
 131                 var method=(lease.current=='free') ? 'DeleteLeases' : 'AddLeases';
 132                 window.console.log(method + "(" +
 133                                    "[" + lease.nodename + "]," +
 134                                    this.slicename + "," +
 135                                    from_time + "," +
 136                                    until_time + ')');
 137             }
 138         }
 139     }
 140
 141     this.clear = function () {
 142         for (var i=0, len=this.leases.length; i<len; ++i) {
 143             var lease=this.leases[i];
 144             if (lease.current != lease.initial) {
 145                 if (lease.initial == 'free') lease_methods.init_free(lease,lease_methods.click_mine);
 146                 else                         lease_methods.init_mine(lease,lease_methods.click_free);
 147             }
 148         }
 149     }
 150
 151     /* initialize mode buttons */
 152     this.init_mode = function (default_mode, node_button, timeslot_button) {
 153         this.node_button=node_button;
 154         this.timeslot_button=timeslot_button;
 155         var scheduler=this;
 156         /* xxx set callbacks on buttons */
 157         node_button.onclick = function () { scheduler.set_mode('node'); }
 158         timeslot_button.onclick = function () { scheduler.set_mode('timeslot'); }
 159         this.set_mode(default_mode);
 160     }
 161
 162     /* expecting mode to be either 'node' or 'timeslot' */
 163     this.set_mode = function (mode) {
 164         this.mode=mode;
 165         var active_button = (mode=='node') ? this.node_button : this.timeslot_button;
 166         active_button.checked='checked';
 167     }
 168
 169
 170 } // end Scheduler
 171
 172 //////////////////////////////////////// couldn't find how to inhererit from the raphael objects...
 173 var lease_methods = {
 174
 175     /* in the process of merging leases before posting to the API */
 176     compare: function (lease, until_time, next_lease) {
 177         return (next_lease['nodename'] == lease['nodename'] &&
 178                 next_lease['from_time'] == until_time &&
 179                 next_lease['initial'] == lease['initial'] &&
 180                 next_lease['current'] == lease['current']);
 181     },
 182
 183     init_free: function (lease, unclick) {
 184         lease.current="free";
 185         // set color
 186         lease.animate((lease.initial=="free") ? attr_lease_free_free : attr_lease_mine_free,anim_delay);
 187         // keep track of the current status
 188         // record action
 189         lease.click (lease_methods.click_free);
 190         if (unclick) lease.unclick(unclick);
 191     },
 192
 193     // find out all the currently free leases that overlap this one
 194     click_free: function (event) {
 195         var scheduler = this.scheduler;
 196         if (scheduler.mode=='node') {
 197             lease_methods.init_mine(this,lease_methods.click_free);
 198         } else {
 199             for (var i=0, len=scheduler.leases.length; i<len; ++i) {
 200                 scan=scheduler.leases[i];
 201                 // overlap ?
 202                 if (scan.from_time<=this.from_time && scan.until_time>=this.until_time)
 203                     if (scan.current == "free") lease_methods.init_mine(scan,lease_methods.click_free);
 204             }
 205         }
 206     },
 207
 208     init_mine: function (lease, unclick) {
 209         lease.current="mine";
 210         lease.animate((lease.initial=="mine") ? attr_lease_mine_mine : attr_lease_free_mine,anim_delay);
 211         lease.click (lease_methods.click_mine);
 212         if (unclick) lease.unclick(unclick);
 213     },
 214
 215     click_mine: function (event) {
 216         var scheduler = this.scheduler;
 217         // this lease was originally free but is now marked for booking
 218         // we free just this lease
 219         if (scheduler.mode=='node') {
 220             lease_methods.init_free(this, lease_methods.click_mine);
 221         } else {
 222             for (var i=0, len=scheduler.leases.length; i<len; ++i) {
 223                 scan=scheduler.leases[i];
 224                 // overlap ?
 225                 if (scan.from_time<=this.from_time && scan.until_time>=this.until_time) {
 226                     if (scan.current == "mine") lease_methods.init_free(scan,lease_methods.click_mine);
 227                 }
 228                 // the other ones just remain as they are
 229             }
 230         }
 231     },
 232
 233
 234     init_other: function (lease, slicename) {
 235         lease.animate (attr_lease_other,anim_delay);
 236         /* a text obj to display the name of the slice that owns that lease */
 237         var slicelabel = paper.text (lease.attr("x")+lease.attr("width")/2,
 238                                      lease.attr("y")+lease.attr("height")/2,slicename).attr(txt_slice);
 239         /* hide it right away */
 240         slicelabel.hide();
 241         /* record it */
 242         lease.label=slicelabel;
 243         lease.hover ( function (e) { this.label.toFront(); this.label.show(); },
 244                       function (e) { this.label.hide(); } );
 245     },
 246 }
 247
 248 function init_scheduler () {
 249     // Grab the data
 250     var data = [], axisx = [], axisy = [];
 251     var table = $$("table#leases_data")[0];
 252     // no reservable nodes - no data
 253     if ( ! table) return;
 254     // the nodenames
 255     table.getElementsBySelector("tbody>tr>th").each(function (cell) {
 256         axisy.push(getInnerText(cell));
 257     });
 258     // the timeslot labels
 259     table.getElementsBySelector("thead>tr>th").each(function (cell) {
 260         /* [0]: timestamp -- [1]: displayable*/
 261         axisx.push(getInnerText(cell).split("&"));
 262     });
 263     // leases - expect colspan to describe length in grains
 264     table.getElementsBySelector("tbody>tr>td").each(function (cell) {
 265         data.push(new Array (getInnerText(cell),cell.colSpan));
 266     });
 267     // slicename : the upper-left cell
 268     var scheduler = new Scheduler (getInnerText(table.getElementsBySelector("thead>tr>td")[0]), axisx, axisy, data);
 269     table.hide();
 270     // leases_area is a <div> created by slice.php as a placeholder
 271     scheduler.init ("leases_area");
 272
 273     var submit=$$("button#leases_submit")[0];
 274     submit.onclick = function () { scheduler.submit(); }
 275     var clear=$$("button#leases_clear")[0];
 276     clear.onclick = function () { scheduler.clear(); }
 277
 278     var node_button=$$("input#leases_mode_node")[0];
 279     var timeslot_button=$$("input#leases_mode_timeslot")[0];
 280     scheduler.init_mode ('timeslot',node_button,timeslot_button);
 281
 282 }
 283
 284 Event.observe(window, 'load', init_scheduler);