planetlab/slices/leases.js

   1 /* need to put some place else in CSS ? */
   2
   3 // space for the nodenames
   4 var x_nodelabel = 200;
   5 // right space after the nodename - removed from the above
   6 var x_sep=20;
   7 // height for the (two) rows of timelabels
   8 var y_header = 12;
   9 // space between nodes
  10 var y_sep = 10;
  11
  12 // 1-grain leases attributes
  13 var x_grain = 24;
  14 var y_node = 15;
  15 var radius= 6;
  16
  17 var anim_delay=500;
  18
  19 /* decorations / headers */
  20
  21 // vertical rules
  22 var attr_rules={'fill':"#888", 'stroke-dasharray':'- ', 'stroke-width':0.5};
  23 var txt_timelabel = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#008"};
  24 var txt_allnodes = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#404"};
  25 var txt_nodelabel = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#008"};
  26
  27 var attr_timebutton = {'fill':'#bbf', 'stroke': '#338','stroke-width':2,
  28                        'stroke-linecap':'round', 'stroke-linejoin':'miter', 'stroke-miterlimit':3};
  29
  30 /* lease dimensions and colors */
  31 /* refrain from using gradient color, seems to not be animated properly */
  32 /* lease was originally free and is still free */
  33 var attr_lease_free_free={'fill':"#def", 'stroke-width':0.5, 'stroke-dasharray':''};
  34 /* lease was originally free and is now set for our usage */
  35 var attr_lease_free_mine={'fill':"green", 'stroke-width':1, 'stroke-dasharray':'-..'};
  36 /* was mine and is still mine */
  37 var attr_lease_mine_mine={'fill':"#beb", 'stroke-width':0.5, 'stroke-dasharray':''};
  38 /* was mine and is about to be released */
  39 var attr_lease_mine_free={'fill':"white", 'stroke-width':1, 'stroke-dasharray':'-..'};
  40 var attr_lease_other={'fill':"#f88"};
  41
  42 /* other slices name */
  43 var txt_slice = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#444",
  44                  "font-size": 15 };
  45
  46 ////////////////////////////////////////////////////////////
  47 // the scheduler object
  48 function Scheduler (slicename, axisx, axisy, data) {
  49
  50     // the data only contain slice names, we need this to find our own leases (mine)
  51     this.slicename=slicename;
  52     this.axisx=axisx;
  53     this.axisy=axisy;
  54     this.data=data;
  55
  56     // utilities to keep track of all the leases
  57     this.leases=[];
  58     this.append_lease = function (lease) {
  59         this.leases.push(lease);
  60     }
  61
  62     // how many time slots
  63     this.nb_grains = function () { return axisx.length;}
  64
  65     this.init = function (canvas_id) {
  66         this.total_width = x_nodelabel + this.nb_grains()*x_grain;
  67         this.total_height =   2*y_header /* the timelabels */
  68                             + 2*y_sep    /* extra space */
  69                             + y_node     /* all-nodes & timebuttons row */
  70                             + (this.axisy.length)*(y_node+y_sep);  /* the regular nodes and preceding space */
  71         paper = Raphael (canvas_id, this.total_width+x_sep, this.total_height);
  72
  73         // maintain the list of nodelabels for the 'all nodes' button
  74         this.nodelabels=[];
  75
  76         ////////// create the time slots legend
  77         var top=0;
  78         var left=x_nodelabel;
  79
  80         var col=0;
  81         for (var i=0, len=axisx.length; i < len; ++i) {
  82             // pick the printable part
  83             timelabel=axisx[i][1];
  84             var y = top+y_header;
  85             if (col%2 == 0) y += y_header;
  86             col +=1;
  87             // display time label
  88             var timelabel=paper.text(left,y,timelabel).attr(txt_timelabel)
  89                 .attr({"font-size":y_header, "text-anchor":"middle"});
  90             // draw vertical line
  91             var path_spec="M"+left+" "+(y+y_header/2)+"L"+left+" "+this.total_height;
  92             var rule=paper.path(path_spec).attr(attr_rules);
  93             left+=x_grain;
  94         }
  95
  96         this.granularity=axisx[1][0]-axisx[0][0];
  97
  98         ////////// the row with the timeslot buttons
  99         // move two lines down
 100         top += 2*y_header+2*y_sep;
 101         left=x_nodelabel;
 102         // all nodes buttons
 103         var allnodes = paper.text (x_nodelabel-x_sep,top+y_node/2,"All nodes").attr(txt_allnodes)
 104                 .attr ({"font-size":y_node, "text-anchor":"end","baseline":"bottom"});
 105         allnodes.scheduler=this;
 106         allnodes.click(allnodes_methods.click);
 107         // timeslot buttons
 108         for (var i=0, len=axisx.length; i < len; ++i) {
 109             var pathspec="M"+left+","+top;
 110             pathspec+="L"+(left+x_grain)+","+top;
 111             pathspec+="L"+(left+x_grain/2)+","+(top+y_node);
 112             pathspec+="L"+left+","+top;
 113             var timebutton=paper.path(pathspec).attr(attr_timebutton);
 114             timebutton.from_time=axisx[i][0];
 115             timebutton.scheduler=this;
 116             timebutton.click(timebutton_methods.click);
 117             left+=x_grain;
 118         }
 119
 120         //////// the body of the scheduler : loop on nodes
 121         top += y_node+y_sep;
 122         var data_index=0;
 123         for (var i=0, len=axisy.length; i<len; ++i) {
 124             nodename=axisy[i];
 125             left=0;
 126             var nodelabel = paper.text(x_nodelabel-x_sep,top+y_node/2,nodename).attr(txt_nodelabel)
 127                 .attr ({"font-size":y_node, "text-anchor":"end","baseline":"bottom"});
 128             nodelabel_methods.selected(nodelabel,1);
 129             nodelabel.click(nodelabel_methods.click);
 130             this.nodelabels.push(nodelabel);
 131
 132             left += x_nodelabel;
 133             var grain=0;
 134             while (grain < this.nb_grains()) {
 135                 slicename=data[data_index][0];
 136                 duration=data[data_index][1];
 137                 var lease=paper.rect (left,top,x_grain*duration,y_node,radius);
 138                 lease.nodename=nodename;
 139                 lease.nodelabel=nodelabel;
 140                 if (slicename == "") {
 141                     lease.initial="free";
 142                     lease_methods.init_free(lease);
 143                 } else if (slicename == this.slicename) {
 144                     lease.initial="mine";
 145                     lease_methods.init_mine(lease);
 146                 } else {
 147                     lease_initial="other";
 148                     lease_methods.init_other(lease,slicename);
 149                 }
 150                 lease.from_time = axisx[grain%this.nb_grains()][0];
 151                 grain += duration;
 152                 lease.until_time = axisx[grain%this.nb_grains()][0];
 153                 // record scheduler in lease
 154                 lease.scheduler=this;
 155                 // and vice versa
 156                 this.append_lease(lease);
 157                 // move on with the loop
 158                 left += x_grain*duration;
 159                 data_index +=1;
 160             }
 161             top += y_node + y_sep;
 162         };
 163     }
 164
 165     this.submit = function () {
 166         for (var i=0, len=this.leases.length; i<len; ++i) {
 167             var lease=this.leases[i];
 168             if (lease.current != lease.initial) {
 169                 var from_time=lease.from_time;
 170                 var until_time=lease.until_time;
 171                 /* scan the leases just after this one and merge if appropriate */
 172                 var j=i+1;
 173                 while (j<len && lease_methods.compare (lease, until_time, this.leases[j])) {
 174                     window.console.log('merged index='+j);
 175                     until_time=this.leases[j].until_time;
 176                     ++j; ++i;
 177                 }
 178                 var method=(lease.current=='free') ? 'DeleteLeases' : 'AddLeases';
 179                 window.console.log(method + "(" +
 180                                    "[" + lease.nodename + "]," +
 181                                    this.slicename + "," +
 182                                    from_time + "," +
 183                                    until_time + ')');
 184             }
 185         }
 186     }
 187
 188     this.clear = function () {
 189         for (var i=0, len=this.leases.length; i<len; ++i) {
 190             var lease=this.leases[i];
 191             if (lease.current != lease.initial) {
 192                 if (lease.initial == 'free') lease_methods.init_free(lease,lease_methods.click_mine);
 193                 else                         lease_methods.init_mine(lease,lease_methods.click_free);
 194             }
 195         }
 196     }
 197
 198 } // end Scheduler
 199
 200 //////////////////////////////////////// couldn't find how to inhererit from the raphael objects...
 201
 202 //////////////////// the 'all nodes' button
 203 var allnodes_methods = {
 204     click: function (event) {
 205         var scheduler=this.scheduler;
 206         /* decide what to do */
 207         var unselected=0;
 208         for (var i=0, len=scheduler.nodelabels.length; i<len; ++i)
 209             if (! scheduler.nodelabels[i].selected) unselected++;
 210         /* if at least one is not selected : select all */
 211         var new_state = (unselected >0) ? 1 : 0;
 212         for (var i=0, len=scheduler.nodelabels.length; i<len; ++i)
 213             nodelabel_methods.selected(scheduler.nodelabels[i],new_state);
 214     }
 215 }
 216
 217 //////////////////// the buttons for managing the whole timeslot
 218 var timebutton_methods = {
 219
 220     /* clicking */
 221     click: function (event) {
 222         var scheduler = this.scheduler;
 223         var from_time = this.from_time;
 224         var until_time = from_time + scheduler.granularity;
 225         /* scan leases on selected nodes, store in two arrays */
 226         var relevant_free=[], relevant_mine=[];
 227         for (var i=0,len=scheduler.leases.length; i<len; ++i) {
 228             var scan=scheduler.leases[i];
 229             if ( ! scan.nodelabel.selected) continue;
 230             // overlap ?
 231             if (scan.from_time<=from_time && scan.until_time>=until_time) {
 232                 if (scan.current == "free")       relevant_free.push(scan);
 233                 else if (scan.current == "mine")  relevant_mine.push(scan);
 234             }
 235         }
 236 //      window.console.log("Found " + relevant_free.length + " free and " + relevant_mine.length + " mine");
 237         /* decide what to do, whether book or release */
 238         if (relevant_mine.length==0 && relevant_free.length==0) {
 239             alert ("Nothing to do in this timeslot on the selected nodes");
 240             return;
 241         }
 242         // if at least one is free, let's book
 243         if (relevant_free.length > 0) {
 244             for (var i=0, len=relevant_free.length; i<len; ++i) {
 245                 var lease=relevant_free[i];
 246                 lease_methods.init_mine(lease,lease_methods.click_free);
 247             }
 248         // otherwise we unselect
 249         } else {
 250             for (var i=0, len=relevant_mine.length; i<len; ++i) {
 251                 var lease=relevant_mine[i];
 252                 lease_methods.init_free(lease,lease_methods.click_mine);
 253             }
 254         }
 255     }
 256 }
 257
 258 //////////////////// the nodelabel buttons
 259 var nodelabel_methods = {
 260
 261     // set selected mode and render visually
 262     selected: function (nodelabel, flag) {
 263         nodelabel.selected=flag;
 264         nodelabel.attr({'font-weight': (flag ? 'bold' : 'normal')});
 265     },
 266
 267     // toggle selected
 268     click: function (event) {
 269         nodelabel_methods.selected( this, ! this.selected );
 270     }
 271 }
 272
 273
 274 //////////////////// the lease buttons
 275 var lease_methods = {
 276
 277     /* in the process of merging leases before posting to the API */
 278     compare: function (lease, until_time, next_lease) {
 279         return (next_lease['nodename'] == lease['nodename'] &&
 280                 next_lease['from_time'] == until_time &&
 281                 next_lease['initial'] == lease['initial'] &&
 282                 next_lease['current'] == lease['current']);
 283     },
 284
 285     init_free: function (lease, unclick) {
 286         lease.current="free";
 287         // set color
 288         lease.animate((lease.initial=="free") ? attr_lease_free_free : attr_lease_mine_free,anim_delay);
 289         // keep track of the current status
 290         // record action
 291         lease.click (lease_methods.click_free);
 292         if (unclick) lease.unclick(unclick);
 293     },
 294
 295     // find out all the currently free leases that overlap this one
 296     click_free: function (event) {
 297         var scheduler = this.scheduler;
 298         lease_methods.init_mine(this,lease_methods.click_free);
 299     },
 300
 301     init_mine: function (lease, unclick) {
 302         lease.current="mine";
 303         lease.animate((lease.initial=="mine") ? attr_lease_mine_mine : attr_lease_free_mine,anim_delay);
 304         lease.click (lease_methods.click_mine);
 305         if (unclick) lease.unclick(unclick);
 306     },
 307
 308     click_mine: function (event) {
 309         var scheduler = this.scheduler;
 310         // this lease was originally free but is now marked for booking
 311         // we free just this lease
 312         lease_methods.init_free(this, lease_methods.click_mine);
 313     },
 314
 315
 316     init_other: function (lease, slicename) {
 317         lease.animate (attr_lease_other,anim_delay);
 318         /* a text obj to display the name of the slice that owns that lease */
 319         var otherslicelabel = paper.text (lease.attr("x")+lease.attr("width")/2,
 320                                           // xxx
 321                                           lease.attr("y")+lease.attr("height")/2,slicename).attr(txt_slice);
 322         /* hide it right away */
 323         otherslicelabel.hide();
 324         /* record it */
 325         lease.label=otherslicelabel;
 326         lease.hover ( function (e) { this.label.toFront(); this.label.show(); },
 327                       function (e) { this.label.hide(); } );
 328     },
 329 }
 330
 331 function init_scheduler () {
 332     // Grab the data
 333     var data = [], axisx = [], axisy = [];
 334     var table = $$("table#leases_data")[0];
 335     // no reservable nodes - no data
 336     if ( ! table) return;
 337     // the nodelabels
 338     table.getElementsBySelector("tbody>tr>th").each(function (cell) {
 339         axisy.push(getInnerText(cell));
 340     });
 341     // the timeslot labels
 342     table.getElementsBySelector("thead>tr>th").each(function (cell) {
 343         /* [0]: timestamp -- [1]: displayable*/
 344         axisx.push(getInnerText(cell).split("&"));
 345     });
 346     // leases - expect colspan to describe length in grains
 347     table.getElementsBySelector("tbody>tr>td").each(function (cell) {
 348         data.push(new Array (getInnerText(cell),cell.colSpan));
 349     });
 350     // slicename : the upper-left cell
 351     var scheduler = new Scheduler (getInnerText(table.getElementsBySelector("thead>tr>td")[0]), axisx, axisy, data);
 352     table.hide();
 353     // leases_area is a <div> created by slice.php as a placeholder
 354     scheduler.init ("leases_area");
 355
 356     var submit=$$("button#leases_submit")[0];
 357     submit.onclick = function () { scheduler.submit(); }
 358     var clear=$$("button#leases_clear")[0];
 359     clear.onclick = function () { scheduler.clear(); }
 360
 361 }
 362
 363 Event.observe(window, 'load', init_scheduler);