wz_jsgraphics.js
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上传用户:wlfwy2004
上传日期:2016-12-12
资源大小:33978k
文件大小:22k
源码类别:
Jsp/Servlet
开发平台:
Java
- /*
- * FCKeditor - The text editor for internet
- * Copyright (C) 2003-2005 Frederico Caldeira Knabben
- *
- * Licensed under the terms of the GNU Lesser General Public License:
- * http://www.opensource.org/licenses/lgpl-license.php
- *
- * For further information visit:
- * http://www.fckeditor.net/
- *
- * File Name: wz_jsgraphics.js
- * Javascript Graphics.
- *
- * File Authors:
- * Grant French (grant@mcpuk.net)
- */
- /***********************************************************************
- ** Title.........: Javascript Graphics
- ** Version.......: 1.0
- ** Author........: Xiang Wei ZHUO <wei@zhuo.org>
- ** Filename......: wz_jsgraphics.js
- ** Last changed..: 31 Aug 2003
- ** Notes.........: Modified for Image Editor, added extra commands
- **/
- /* This notice must be untouched at all times.
- wz_jsgraphics.js v. 2.03
- The latest version is available at
- http://www.walterzorn.com
- or http://www.devira.com
- or http://www.walterzorn.de
- Copyright (c) 2002-2003 Walter Zorn. All rights reserved.
- Created 3. 11. 2002 by Walter Zorn <walter@kreuzotter.de>
- Last modified: 11. 6. 2003
- High Performance JavaScript Graphics Library.
- Provides methods
- - to draw lines, rectangles, ellipses, polygons
- with specifiable line thickness,
- - to fill rectangles and ellipses
- - to draw text.
- NOTE: Operations, functions and branching have rather been optimized
- to efficiency and speed than to shortness of source code.
- This program is free software;
- you can redistribute it and/or modify it under the terms of the
- GNU General Public License as published by the Free Software Foundation;
- either version 2 of the License, or (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY;
- without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- See the GNU General Public License
- at http://www.gnu.org/copyleft/gpl.html for more details.
- */
- var jg_ihtm, jg_ie, jg_dom,
- jg_n4 = (document.layers && typeof document.classes != "undefined");
- function chkDHTM(x, i)
- {
- x = document.body || null;
- jg_ie = (x && typeof x.insertAdjacentHTML != "undefined");
- jg_dom = (x && !jg_ie &&
- typeof x.appendChild != "undefined" &&
- typeof document.createRange != "undefined" &&
- typeof (i = document.createRange()).setStartBefore != "undefined" &&
- typeof i.createContextualFragment != "undefined");
- jg_ihtm = (!jg_ie && !jg_dom && x && typeof x.innerHTML != "undefined");
- }
- function pntDoc()
- {
- this.wnd.document.write(this.htm);
- this.htm = '';
- }
- function pntCnvDom()
- {
- var x = document.createRange();
- x.setStartBefore(this.cnv);
- x = x.createContextualFragment(this.htm);
- this.cnv.appendChild(x);
- this.htm = '';
- }
- function pntCnvIe()
- {
- this.cnv.insertAdjacentHTML("BeforeEnd", this.htm);
- this.htm = '';
- }
- function pntCnvIhtm()
- {
- this.cnv.innerHTML += this.htm;
- this.htm = '';
- }
- function pntCnv()
- {
- this.htm = '';
- }
- function mkDiv(x, y, w, h)
- {
- this.htm += '<div style="position:absolute;'+
- 'left:' + x + 'px;'+
- 'top:' + y + 'px;'+
- 'width:' + w + 'px;'+
- 'height:' + h + 'px;'+
- 'clip:rect(0,'+w+'px,'+h+'px,0);'+
- 'overflow:hidden;background-color:' + this.color + ';'+
- '"></div>';
- //alert(this.htm);
- }
- function mkDivPrint(x, y, w, h)
- {
- this.htm += '<div style="position:absolute;'+
- 'border-left:' + w + 'px solid ' + this.color + ';'+
- 'left:' + x + 'px;'+
- 'top:' + y + 'px;'+
- 'width:' + w + 'px;'+
- 'height:' + h + 'px;'+
- 'clip:rect(0,'+w+'px,'+h+'px,0);'+
- 'overflow:hidden;background-color:' + this.color + ';'+
- '"></div>';
- }
- function mkLyr(x, y, w, h)
- {
- this.htm += '<layer '+
- 'left="' + x + '" '+
- 'top="' + y + '" '+
- 'width="' + w + '" '+
- 'height="' + h + '" '+
- 'bgcolor="' + this.color + '"></layer>n';
- }
- function mkLbl(txt, x, y)
- {
- this.htm += '<div style="position:absolute;white-space:nowrap;'+
- 'left:' + x + 'px;'+
- 'top:' + y + 'px;'+
- 'font-family:' + this.ftFam + ';'+
- 'font-size:' + this.ftSz + ';'+
- 'color:' + this.color + ';' + this.ftSty + '">'+
- txt +
- '</div>';
- }
- function mkLin(x1, y1, x2, y2)
- {
- if (x1 > x2)
- {
- var _x2 = x2;
- var _y2 = y2;
- x2 = x1;
- y2 = y1;
- x1 = _x2;
- y1 = _y2;
- }
- var dx = x2-x1, dy = Math.abs(y2-y1),
- x = x1, y = y1,
- yIncr = (y1 > y2)? -1 : 1;
- if (dx >= dy)
- {
- var pr = dy<<1,
- pru = pr - (dx<<1),
- p = pr-dx,
- ox = x;
- while ((dx--) > 0)
- {
- ++x;
- if (p > 0)
- {
- this.mkDiv(ox, y, x-ox, 1);
- y += yIncr;
- p += pru;
- ox = x;
- }
- else p += pr;
- }
- this.mkDiv(ox, y, x2-ox+1, 1);
- }
- else
- {
- var pr = dx<<1,
- pru = pr - (dy<<1),
- p = pr-dy,
- oy = y;
- if (y2 <= y1)
- {
- while ((dy--) > 0)
- {
- if (p > 0)
- {
- this.mkDiv(x++, y, 1, oy-y+1);
- y += yIncr;
- p += pru;
- oy = y;
- }
- else
- {
- y += yIncr;
- p += pr;
- }
- }
- this.mkDiv(x2, y2, 1, oy-y2+1);
- }
- else
- {
- while ((dy--) > 0)
- {
- y += yIncr;
- if (p > 0)
- {
- this.mkDiv(x++, oy, 1, y-oy);
- p += pru;
- oy = y;
- }
- else p += pr;
- }
- this.mkDiv(x2, oy, 1, y2-oy+1);
- }
- }
- }
- function mkLin2D(x1, y1, x2, y2)
- {
- if (x1 > x2)
- {
- var _x2 = x2;
- var _y2 = y2;
- x2 = x1;
- y2 = y1;
- x1 = _x2;
- y1 = _y2;
- }
- var dx = x2-x1, dy = Math.abs(y2-y1),
- x = x1, y = y1,
- yIncr = (y1 > y2)? -1 : 1;
- var s = this.stroke;
- if (dx >= dy)
- {
- if (s-0x3 > 0)
- {
- var _s = (s*dx*Math.sqrt(1+dy*dy/(dx*dx))-dx-(s>>1)*dy) / dx;
- _s = (!(s-0x4)? Math.ceil(_s) : Math.round(_s)) + 1;
- }
- else var _s = s;
- var ad = Math.ceil(s/2);
- var pr = dy<<1,
- pru = pr - (dx<<1),
- p = pr-dx,
- ox = x;
- while ((dx--) > 0)
- {
- ++x;
- if (p > 0)
- {
- this.mkDiv(ox, y, x-ox+ad, _s);
- y += yIncr;
- p += pru;
- ox = x;
- }
- else p += pr;
- }
- this.mkDiv(ox, y, x2-ox+ad+1, _s);
- }
- else
- {
- if (s-0x3 > 0)
- {
- var _s = (s*dy*Math.sqrt(1+dx*dx/(dy*dy))-(s>>1)*dx-dy) / dy;
- _s = (!(s-0x4)? Math.ceil(_s) : Math.round(_s)) + 1;
- }
- else var _s = s;
- var ad = Math.round(s/2);
- var pr = dx<<1,
- pru = pr - (dy<<1),
- p = pr-dy,
- oy = y;
- if (y2 <= y1)
- {
- ++ad;
- while ((dy--) > 0)
- {
- if (p > 0)
- {
- this.mkDiv(x++, y, _s, oy-y+ad);
- y += yIncr;
- p += pru;
- oy = y;
- }
- else
- {
- y += yIncr;
- p += pr;
- }
- }
- this.mkDiv(x2, y2, _s, oy-y2+ad);
- }
- else
- {
- while ((dy--) > 0)
- {
- y += yIncr;
- if (p > 0)
- {
- this.mkDiv(x++, oy, _s, y-oy+ad);
- p += pru;
- oy = y;
- }
- else p += pr;
- }
- this.mkDiv(x2, oy, _s, y2-oy+ad+1);
- }
- }
- }
- function mkLinDott(x1, y1, x2, y2)
- {
- if (x1 > x2)
- {
- var _x2 = x2;
- var _y2 = y2;
- x2 = x1;
- y2 = y1;
- x1 = _x2;
- y1 = _y2;
- }
- var dx = x2-x1, dy = Math.abs(y2-y1),
- x = x1, y = y1,
- yIncr = (y1 > y2)? -1 : 1,
- drw = true;
- if (dx >= dy)
- {
- var pr = dy<<1,
- pru = pr - (dx<<1),
- p = pr-dx;
- while ((dx--) > 0)
- {
- if (drw) this.mkDiv(x, y, 1, 1);
- drw = !drw;
- if (p > 0)
- {
- y += yIncr;
- p += pru;
- }
- else p += pr;
- ++x;
- }
- if (drw) this.mkDiv(x, y, 1, 1);
- }
- else
- {
- var pr = dx<<1,
- pru = pr - (dy<<1),
- p = pr-dy;
- while ((dy--) > 0)
- {
- if (drw) this.mkDiv(x, y, 1, 1);
- drw = !drw;
- y += yIncr;
- if (p > 0)
- {
- ++x;
- p += pru;
- }
- else p += pr;
- }
- if (drw) this.mkDiv(x, y, 1, 1);
- }
- }
- function mkOv(left, top, width, height)
- {
- var a = width>>1, b = height>>1,
- wod = width&1, hod = (height&1)+1,
- cx = left+a, cy = top+b,
- x = 0, y = b,
- ox = 0, oy = b,
- aa = (a*a)<<1, bb = (b*b)<<1,
- st = (aa>>1)*(1-(b<<1)) + bb,
- tt = (bb>>1) - aa*((b<<1)-1),
- w, h;
- while (y > 0)
- {
- if (st < 0)
- {
- st += bb*((x<<1)+0x3);
- tt += (bb<<1)*(++x);
- }
- else if (tt < 0)
- {
- st += bb*((x<<1)+0x3) - (aa<<1)*(y-1);
- tt += (bb<<1)*(++x) - aa*(((y--)<<1)-0x3);
- w = x-ox;
- h = oy-y;
- if (w&0x2 && h&0x2)
- {
- this.mkOvQds(cx, cy, -x+0x2, ox+wod, -oy, oy-1+hod, 1, 1);
- this.mkOvQds(cx, cy, -x+1, x-1+wod, -y-1, y+hod, 1, 1);
- }
- else this.mkOvQds(cx, cy, -x+1, ox+wod, -oy, oy-h+hod, w, h);
- ox = x;
- oy = y;
- }
- else
- {
- tt -= aa*((y<<1)-0x3);
- st -= (aa<<1)*(--y);
- }
- }
- this.mkDiv(cx-a, cy-oy, a-ox+1, (oy<<1)+hod);
- this.mkDiv(cx+ox+wod, cy-oy, a-ox+1, (oy<<1)+hod);
- }
- function mkOv2D(left, top, width, height)
- {
- var s = this.stroke;
- width += s-1;
- height += s-1;
- var a = width>>1, b = height>>1,
- wod = width&1, hod = (height&1)+1,
- cx = left+a, cy = top+b,
- x = 0, y = b,
- aa = (a*a)<<1, bb = (b*b)<<1,
- st = (aa>>1)*(1-(b<<1)) + bb,
- tt = (bb>>1) - aa*((b<<1)-1);
- if (s-0x4 < 0 && (!(s-0x2) || width-0x33 > 0 && height-0x33 > 0))
- {
- var ox = 0, oy = b,
- w, h,
- pxl, pxr, pxt, pxb, pxw;
- while (y > 0)
- {
- if (st < 0)
- {
- st += bb*((x<<1)+0x3);
- tt += (bb<<1)*(++x);
- }
- else if (tt < 0)
- {
- st += bb*((x<<1)+0x3) - (aa<<1)*(y-1);
- tt += (bb<<1)*(++x) - aa*(((y--)<<1)-0x3);
- w = x-ox;
- h = oy-y;
- if (w-1)
- {
- pxw = w+1+(s&1);
- h = s;
- }
- else if (h-1)
- {
- pxw = s;
- h += 1+(s&1);
- }
- else pxw = h = s;
- this.mkOvQds(cx, cy, -x+1, ox-pxw+w+wod, -oy, -h+oy+hod, pxw, h);
- ox = x;
- oy = y;
- }
- else
- {
- tt -= aa*((y<<1)-0x3);
- st -= (aa<<1)*(--y);
- }
- }
- this.mkDiv(cx-a, cy-oy, s, (oy<<1)+hod);
- this.mkDiv(cx+a+wod-s+1, cy-oy, s, (oy<<1)+hod);
- }
- else
- {
- var _a = (width-((s-1)<<1))>>1,
- _b = (height-((s-1)<<1))>>1,
- _x = 0, _y = _b,
- _aa = (_a*_a)<<1, _bb = (_b*_b)<<1,
- _st = (_aa>>1)*(1-(_b<<1)) + _bb,
- _tt = (_bb>>1) - _aa*((_b<<1)-1),
- pxl = new Array(),
- pxt = new Array(),
- _pxb = new Array();
- pxl[0] = 0;
- pxt[0] = b;
- _pxb[0] = _b-1;
- while (y > 0)
- {
- if (st < 0)
- {
- st += bb*((x<<1)+0x3);
- tt += (bb<<1)*(++x);
- pxl[pxl.length] = x;
- pxt[pxt.length] = y;
- }
- else if (tt < 0)
- {
- st += bb*((x<<1)+0x3) - (aa<<1)*(y-1);
- tt += (bb<<1)*(++x) - aa*(((y--)<<1)-0x3);
- pxl[pxl.length] = x;
- pxt[pxt.length] = y;
- }
- else
- {
- tt -= aa*((y<<1)-0x3);
- st -= (aa<<1)*(--y);
- }
- if (_y > 0)
- {
- if (_st < 0)
- {
- _st += _bb*((_x<<1)+0x3);
- _tt += (_bb<<1)*(++_x);
- _pxb[_pxb.length] = _y-1;
- }
- else if (_tt < 0)
- {
- _st += _bb*((_x<<1)+0x3) - (_aa<<1)*(_y-1);
- _tt += (_bb<<1)*(++_x) - _aa*(((_y--)<<1)-0x3);
- _pxb[_pxb.length] = _y-1;
- }
- else
- {
- _tt -= _aa*((_y<<1)-0x3);
- _st -= (_aa<<1)*(--_y);
- _pxb[_pxb.length-1]--;
- }
- }
- }
- var ox = 0, oy = b,
- _oy = _pxb[0],
- l = pxl.length,
- w, h;
- for (var i = 0; i < l; i++)
- {
- if (typeof _pxb[i] != "undefined")
- {
- if (_pxb[i] < _oy || pxt[i] < oy)
- {
- x = pxl[i];
- this.mkOvQds(cx, cy, -x+1, ox+wod, -oy, _oy+hod, x-ox, oy-_oy);
- ox = x;
- oy = pxt[i];
- _oy = _pxb[i];
- }
- }
- else
- {
- x = pxl[i];
- this.mkDiv(cx-x+1, cy-oy, 1, (oy<<1)+hod);
- this.mkDiv(cx+ox+wod, cy-oy, 1, (oy<<1)+hod);
- ox = x;
- oy = pxt[i];
- }
- }
- this.mkDiv(cx-a, cy-oy, 1, (oy<<1)+hod);
- this.mkDiv(cx+ox+wod, cy-oy, 1, (oy<<1)+hod);
- }
- }
- function mkOvDott(left, top, width, height)
- {
- var a = width>>1, b = height>>1,
- wod = width&1, hod = height&1,
- cx = left+a, cy = top+b,
- x = 0, y = b,
- aa2 = (a*a)<<1, aa4 = aa2<<1, bb = (b*b)<<1,
- st = (aa2>>1)*(1-(b<<1)) + bb,
- tt = (bb>>1) - aa2*((b<<1)-1),
- drw = true;
- while (y > 0)
- {
- if (st < 0)
- {
- st += bb*((x<<1)+0x3);
- tt += (bb<<1)*(++x);
- }
- else if (tt < 0)
- {
- st += bb*((x<<1)+0x3) - aa4*(y-1);
- tt += (bb<<1)*(++x) - aa2*(((y--)<<1)-0x3);
- }
- else
- {
- tt -= aa2*((y<<1)-0x3);
- st -= aa4*(--y);
- }
- if (drw) this.mkOvQds(cx, cy, -x, x+wod, -y, y+hod, 1, 1);
- drw = !drw;
- }
- }
- function mkRect(x, y, w, h)
- {
- var s = this.stroke;
- this.mkDiv(x, y, w, s);
- this.mkDiv(x+w, y, s, h);
- this.mkDiv(x, y+h, w+s, s);
- this.mkDiv(x, y+s, s, h-s);
- }
- function mkRectDott(x, y, w, h)
- {
- this.drawLine(x, y, x+w, y);
- this.drawLine(x+w, y, x+w, y+h);
- this.drawLine(x, y+h, x+w, y+h);
- this.drawLine(x, y, x, y+h);
- }
- function jsgFont()
- {
- this.PLAIN = 'font-weight:normal;';
- this.BOLD = 'font-weight:bold;';
- this.ITALIC = 'font-style:italic;';
- this.ITALIC_BOLD = this.ITALIC + this.BOLD;
- this.BOLD_ITALIC = this.ITALIC_BOLD;
- }
- var Font = new jsgFont();
- function jsgStroke()
- {
- this.DOTTED = -1;
- }
- var Stroke = new jsgStroke();
- function jsGraphics(id, wnd)
- {
- this.setColor = new Function('arg', 'this.color = arg;');
- this.getColor = new Function('return this.color');
- this.setStroke = function(x)
- {
- this.stroke = x;
- if (!(x+1))
- {
- this.drawLine = mkLinDott;
- this.mkOv = mkOvDott;
- this.drawRect = mkRectDott;
- }
- else if (x-1 > 0)
- {
- this.drawLine = mkLin2D;
- this.mkOv = mkOv2D;
- this.drawRect = mkRect;
- }
- else
- {
- this.drawLine = mkLin;
- this.mkOv = mkOv;
- this.drawRect = mkRect;
- }
- };
- this.setPrintable = function(arg)
- {
- this.printable = arg;
- this.mkDiv = jg_n4? mkLyr : arg? mkDivPrint : mkDiv;
- };
- this.setFont = function(fam, sz, sty)
- {
- this.ftFam = fam;
- this.ftSz = sz;
- this.ftSty = sty || Font.PLAIN;
- };
- this.drawPolyline = this.drawPolyLine = function(x, y, s)
- {
- var i = x.length-1; while (i >= 0)
- this.drawLine(x[i], y[i], x[--i], y[i]);
- };
- this.fillRect = function(x, y, w, h)
- {
- this.mkDiv(x, y, w, h);
- };
- this.fillRectPattern = function(x, y, w, h, url)
- {
- this.htm += '<div style="position:absolute;'+
- 'left:' + x + 'px;'+
- 'top:' + y + 'px;'+
- 'width:' + w + 'px;'+
- 'height:' + h + 'px;'+
- 'clip:rect(0,'+w+'px,'+h+'px,0);'+
- 'overflow:hidden;'+
- //'background-color:' + this.color + ';'+
- "background-image: url('" + url + "');"+
- "layer-background-image: url('" + url + "');"+
- 'z-index:100;"></div>';
- //alert(this.htm);
- }
- this.drawHandle = function(x, y, w, h, cursor)
- {
- this.htm += '<div style="position:absolute;'+
- 'left:' + x + 'px;'+
- 'top:' + y + 'px;'+
- 'width:' + w + 'px;'+
- 'height:' + h + 'px;'+
- 'clip:rect(0,'+w+'px,'+h+'px,0);'+
- 'padding: 2px;overflow:hidden;'+
- "cursor: '" + cursor + "';"+
- '" class="handleBox" id="' + cursor + '" ></div>';
- }
- this.drawHandleBox = function(x, y, w, h, cursor)
- {
- this.htm += '<div style="position:absolute;'+
- 'left:' + x + 'px;'+
- 'top:' + y + 'px;'+
- 'width:' + w + 'px;'+
- 'height:' + h + 'px;'+
- 'clip:rect(0,'+(w+2)+'px,'+(h+2)+'px,0);'+
- 'overflow:hidden; border: solid 1px '+ this.color+';'+
- "cursor: '" + cursor + "';"+
- '" class="handleBox" id="' + cursor + '" ></div>';
- }
- this.drawPolygon = function(x, y)
- {
- this.drawPolyline(x, y);
- this.drawLine(x[x.length-1], y[x.length-1], x[0], y[0]);
- };
- this.drawEllipse = this.drawOval = function(x, y, w, h)
- {
- this.mkOv(x, y, w, h);
- };
- this.fillEllipse = this.fillOval = function(left, top, w, h)
- {
- var a = (w -= 1)>>1, b = (h -= 1)>>1,
- wod = (w&1)+1, hod = (h&1)+1,
- cx = left+a, cy = top+b,
- x = 0, y = b,
- ox = 0, oy = b,
- aa2 = (a*a)<<1, aa4 = aa2<<1, bb = (b*b)<<1,
- st = (aa2>>1)*(1-(b<<1)) + bb,
- tt = (bb>>1) - aa2*((b<<1)-1),
- pxl, dw, dh;
- if (w+1) while (y > 0)
- {
- if (st < 0)
- {
- st += bb*((x<<1)+0x3);
- tt += (bb<<1)*(++x);
- }
- else if (tt < 0)
- {
- st += bb*((x<<1)+0x3) - aa4*(y-1);
- pxl = cx-x;
- dw = (x<<1)+wod;
- tt += (bb<<1)*(++x) - aa2*(((y--)<<1)-0x3);
- dh = oy-y;
- this.mkDiv(pxl, cy-oy, dw, dh);
- this.mkDiv(pxl, cy+oy-dh+hod, dw, dh);
- ox = x;
- oy = y;
- }
- else
- {
- tt -= aa2*((y<<1)-0x3);
- st -= aa4*(--y);
- }
- }
- this.mkDiv(cx-a, cy-oy, w+1, (oy<<1)+hod);
- };
- this.drawString = mkLbl;
- this.clear = function()
- {
- this.htm = "";
- if (this.cnv) this.cnv.innerHTML = this.defhtm;
- };
- this.mkOvQds = function(cx, cy, xl, xr, yt, yb, w, h)
- {
- this.mkDiv(xr+cx, yt+cy, w, h);
- this.mkDiv(xr+cx, yb+cy, w, h);
- this.mkDiv(xl+cx, yb+cy, w, h);
- this.mkDiv(xl+cx, yt+cy, w, h);
- };
- this.setStroke(1);
- this.setPrintable(false);
- this.setFont('verdana,geneva,helvetica,sans-serif', String.fromCharCode(0x31, 0x32, 0x70, 0x78), Font.PLAIN);
- this.color = '#000000';
- this.htm = '';
- this.wnd = wnd || window;
- if (!(jg_ie || jg_dom || jg_ihtm)) chkDHTM();
- if (typeof id != 'string' || !id) this.paint = pntDoc;
- else
- {
- this.cnv = document.all? (this.wnd.document.all[id] || null)
- : document.getElementById? (this.wnd.document.getElementById(id) || null)
- : null;
- this.defhtm = (this.cnv && this.cnv.innerHTML)? this.cnv.innerHTML : '';
- this.paint = jg_dom? pntCnvDom : jg_ie? pntCnvIe : jg_ihtm? pntCnvIhtm : pntCnv;
- }
- }