Sindbad~EG File Manager

    VCanvas_vml = createClass(VCanvas_base, {
        init: function (width, height, target) {
            var groupel;
            VCanvas_vml._super.init.call(this, width, height, target);
            if (target[0]) {
                target = target[0];
            }
            $.data(target, '_jqs_vcanvas', this);
            this.canvas = document.createElement('span');
            $(this.canvas).css({ display: 'inline-block', position: 'relative', overflow: 'hidden', width: width, height: height, margin: '0px', padding: '0px', verticalAlign: 'top'});
            this._insert(this.canvas, target);
            this._calculatePixelDims(width, height, this.canvas);
            this.canvas.width = this.pixelWidth;
            this.canvas.height = this.pixelHeight;
            groupel = '<v:group coordorigin="0 0" coordsize="' + this.pixelWidth + ' ' + this.pixelHeight + '"' +
                    ' style="position:absolute;top:0;left:0;width:' + this.pixelWidth + 'px;height=' + this.pixelHeight + 'px;"></v:group>';
            this.canvas.insertAdjacentHTML('beforeEnd', groupel);
            this.group = $(this.canvas).children()[0];
            this.rendered = false;
            this.prerender = '';
        },

        _drawShape: function (shapeid, path, lineColor, fillColor, lineWidth) {
            var vpath = [],
                initial, stroke, fill, closed, vel, plen, i;
            for (i = 0, plen = path.length; i < plen; i++) {
                vpath[i] = '' + (path[i][0]) + ',' + (path[i][1]);
            }
            initial = vpath.splice(0, 1);
            lineWidth = lineWidth === undefined ? 1 : lineWidth;
            stroke = lineColor === undefined ? ' stroked="false" ' : ' strokeWeight="' + lineWidth + 'px" strokeColor="' + lineColor + '" ';
            fill = fillColor === undefined ? ' filled="false"' : ' fillColor="' + fillColor + '" filled="true" ';
            closed = vpath[0] === vpath[vpath.length - 1] ? 'x ' : '';
            vel = '<v:shape coordorigin="0 0" coordsize="' + this.pixelWidth + ' ' + this.pixelHeight + '" ' +
                 ' id="jqsshape' + shapeid + '" ' +
                 stroke +
                 fill +
                ' style="position:absolute;left:0px;top:0px;height:' + this.pixelHeight + 'px;width:' + this.pixelWidth + 'px;padding:0px;margin:0px;" ' +
                ' path="m ' + initial + ' l ' + vpath.join(', ') + ' ' + closed + 'e">' +
                ' </v:shape>';
            return vel;
        },

        _drawCircle: function (shapeid, x, y, radius, lineColor, fillColor, lineWidth) {
            var stroke, fill, vel;
            x -= radius;
            y -= radius;
            stroke = lineColor === undefined ? ' stroked="false" ' : ' strokeWeight="' + lineWidth + 'px" strokeColor="' + lineColor + '" ';
            fill = fillColor === undefined ? ' filled="false"' : ' fillColor="' + fillColor + '" filled="true" ';
            vel = '<v:oval ' +
                 ' id="jqsshape' + shapeid + '" ' +
                stroke +
                fill +
                ' style="position:absolute;top:' + y + 'px; left:' + x + 'px; width:' + (radius * 2) + 'px; height:' + (radius * 2) + 'px"></v:oval>';
            return vel;

        },

        _drawPieSlice: function (shapeid, x, y, radius, startAngle, endAngle, lineColor, fillColor) {
            var vpath, startx, starty, endx, endy, stroke, fill, vel;
            if (startAngle === endAngle) {
                return '';  // VML seems to have problem when start angle equals end angle.
            }
            if ((endAngle - startAngle) === (2 * Math.PI)) {
                startAngle = 0.0;  // VML seems to have a problem when drawing a full circle that doesn't start 0
                endAngle = (2 * Math.PI);
            }

            startx = x + Math.round(Math.cos(startAngle) * radius);
            starty = y + Math.round(Math.sin(startAngle) * radius);
            endx = x + Math.round(Math.cos(endAngle) * radius);
            endy = y + Math.round(Math.sin(endAngle) * radius);

            if (startx === endx && starty === endy) {
                if ((endAngle - startAngle) < Math.PI) {
                    // Prevent very small slices from being mistaken as a whole pie
                    return '';
                }
                // essentially going to be the entire circle, so ignore startAngle
                startx = endx = x + radius;
                starty = endy = y;
            }

            if (startx === endx && starty === endy && (endAngle - startAngle) < Math.PI) {
                return '';
            }

            vpath = [x - radius, y - radius, x + radius, y + radius, startx, starty, endx, endy];
            stroke = lineColor === undefined ? ' stroked="false" ' : ' strokeWeight="1px" strokeColor="' + lineColor + '" ';
            fill = fillColor === undefined ? ' filled="false"' : ' fillColor="' + fillColor + '" filled="true" ';
            vel = '<v:shape coordorigin="0 0" coordsize="' + this.pixelWidth + ' ' + this.pixelHeight + '" ' +
                 ' id="jqsshape' + shapeid + '" ' +
                 stroke +
                 fill +
                ' style="position:absolute;left:0px;top:0px;height:' + this.pixelHeight + 'px;width:' + this.pixelWidth + 'px;padding:0px;margin:0px;" ' +
                ' path="m ' + x + ',' + y + ' wa ' + vpath.join(', ') + ' x e">' +
                ' </v:shape>';
            return vel;
        },

        _drawRect: function (shapeid, x, y, width, height, lineColor, fillColor) {
            return this._drawShape(shapeid, [[x, y], [x, y + height], [x + width, y + height], [x + width, y], [x, y]], lineColor, fillColor);
        },

        reset: function () {
            this.group.innerHTML = '';
        },

        appendShape: function (shape) {
            var vel = this['_draw' + shape.type].apply(this, shape.args);
            if (this.rendered) {
                this.group.insertAdjacentHTML('beforeEnd', vel);
            } else {
                this.prerender += vel;
            }
            this.lastShapeId = shape.id;
            return shape.id;
        },

        replaceWithShape: function (shapeid, shape) {
            var existing = $('#jqsshape' + shapeid),
                vel = this['_draw' + shape.type].apply(this, shape.args);
            existing[0].outerHTML = vel;
        },

        replaceWithShapes: function (shapeids, shapes) {
            // replace the first shapeid with all the new shapes then toast the remaining old shapes
            var existing = $('#jqsshape' + shapeids[0]),
                replace = '',
                slen = shapes.length,
                i;
            for (i = 0; i < slen; i++) {
                replace += this['_draw' + shapes[i].type].apply(this, shapes[i].args);
            }
            existing[0].outerHTML = replace;
            for (i = 1; i < shapeids.length; i++) {
                $('#jqsshape' + shapeids[i]).remove();
            }
        },

        insertAfterShape: function (shapeid, shape) {
            var existing = $('#jqsshape' + shapeid),
                 vel = this['_draw' + shape.type].apply(this, shape.args);
            existing[0].insertAdjacentHTML('afterEnd', vel);
        },

        removeShapeId: function (shapeid) {
            var existing = $('#jqsshape' + shapeid);
            this.group.removeChild(existing[0]);
        },

        getShapeAt: function (el, x, y) {
            var shapeid = el.id.substr(8);
            return shapeid;
        },

        render: function () {
            if (!this.rendered) {
                // batch the intial render into a single repaint
                this.group.innerHTML = this.prerender;
                this.rendered = true;
            }
        }
    });