OpenOffice绘图:增强的几何图形解析
OpenOffice draw:enhanced-geometry parsing
我正在编写OOo转换器，并被困在draw:enhanced-geometry>draw:enhanced-path和draw:equation上，找不到任何关于这一部分的解决方案或广泛的文档。至少mb有人可以推荐如何评估它？
我贴在上面的示例代码（画气球）：
"draw:enhanced-geometry": [{
"$": {
"svg:viewBox": "0 0 21600 21600",
"draw:text-areas": "800 800 20800 20800",
"draw:type": "round-rectangular-callout",
"draw:modifiers": "3289.58566629339 27438.6415787058",
"draw:enhanced-path": "M 3590 0 X 0 3590 L ?f2 ?f3 0 8970 0 12630 ?f4 ?f5 0 18010 Y 3590 21600 L ?f6 ?f7 8970 21600 12630 21600 ?f8 ?f9 18010 21600 X 21600 18010 L ?f10 ?f11 21600 12630 21600 8970 ?f12 ?f13 21600 3590 Y 18010 0 L ?f14 ?f15 12630 0 8970 0 ?f16 ?f17 Z N"
},
"draw:equation": [{
"$": {
"draw:name": "f0",
"draw:formula": "$0 -10800"
}
},
{
"$": {
"draw:name": "f1",
"draw:formula": "$1 -10800"
}
},
{
"$": {
"draw:name": "f2",
"draw:formula": "if(?f18 ,$0 ,0)"
}
},
{
"$": {
"draw:name": "f3",
"draw:formula": "if(?f18 ,$1 ,6280)"
}
},
{
"$": {
"draw:name": "f4",
"draw:formula": "if(?f23 ,$0 ,0)"
}
},
{
"$": {
"draw:name": "f5",
"draw:formula": "if(?f23 ,$1 ,15320)"
}
},
{
"$": {
"draw:name": "f6",
"draw:formula": "if(?f26 ,$0 ,6280)"
}
},
{
"$": {
"draw:name": "f7",
"draw:formula": "if(?f26 ,$1 ,21600)"
}
},
{
"$": {
"draw:name": "f8",
"draw:formula": "if(?f29 ,$0 ,15320)"
}
},
{
"$": {
"draw:name": "f9",
"draw:formula": "if(?f29 ,$1 ,21600)"
}
},
{
"$": {
"draw:name": "f10",
"draw:formula": "if(?f32 ,$0 ,21600)"
}
},
{
"$": {
"draw:name": "f11",
"draw:formula": "if(?f32 ,$1 ,15320)"
}
},
{
"$": {
"draw:name": "f12",
"draw:formula": "if(?f34 ,$0 ,21600)"
}
},
{
"$": {
"draw:name": "f13",
"draw:formula": "if(?f34 ,$1 ,6280)"
}
},
{
"$": {
"draw:name": "f14",
"draw:formula": "if(?f36 ,$0 ,15320)"
}
},
{
"$": {
"draw:name": "f15",
"draw:formula": "if(?f36 ,$1 ,0)"
}
},
{
"$": {
"draw:name": "f16",
"draw:formula": "if(?f38 ,$0 ,6280)"
}
},
{
"$": {
"draw:name": "f17",
"draw:formula": "if(?f38 ,$1 ,0)"
}
},
{
"$": {
"draw:name": "f18",
"draw:formula": "if($0 ,-1,?f19 )"
}
},
{
"$": {
"draw:name": "f19",
"draw:formula": "if(?f1 ,-1,?f22 )"
}
},
{
"$": {
"draw:name": "f20",
"draw:formula": "abs(?f0 )"
}
},
{
"$": {
"draw:name": "f21",
"draw:formula": "abs(?f1 )"
}
},
{
"$": {
"draw:name": "f22",
"draw:formula": "?f20 -?f21 "
}
},
{
"$": {
"draw:name": "f23",
"draw:formula": "if($0 ,-1,?f24 )"
}
},
{
"$": {
"draw:name": "f24",
"draw:formula": "if(?f1 ,?f22 ,-1)"
}
},
{
"$": {
"draw:name": "f25",
"draw:formula": "$1 -21600"
}
},
{
"$": {
"draw:name": "f26",
"draw:formula": "if(?f25 ,?f27 ,-1)"
}
},
{
"$": {
"draw:name": "f27",
"draw:formula": "if(?f0 ,-1,?f28 )"
}
},
{
"$": {
"draw:name": "f28",
"draw:formula": "?f21 -?f20 "
}
},
{
"$": {
"draw:name": "f29",
"draw:formula": "if(?f25 ,?f30 ,-1)"
}
},
{
"$": {
"draw:name": "f30",
"draw:formula": "if(?f0 ,?f28 ,-1)"
}
},
{
"$": {
"draw:name": "f31",
"draw:formula": "$0 -21600"
}
},
{
"$": {
"draw:name": "f32",
"draw:formula": "if(?f31 ,?f33 ,-1)"
}
},
{
"$": {
"draw:name": "f33",
"draw:formula": "if(?f1 ,?f22 ,-1)"
}
},
{
"$": {
"draw:name": "f34",
"draw:formula": "if(?f31 ,?f35 ,-1)"
}
},
{
"$": {
"draw:name": "f35",
"draw:formula": "if(?f1 ,-1,?f22 )"
}
},
{
"$": {
"draw:name": "f36",
"draw:formula": "if($1 ,-1,?f37 )"
}
},
{
"$": {
"draw:name": "f37",
"draw:formula": "if(?f0 ,?f28 ,-1)"
}
},
{
"$": {
"draw:name": "f38",
"draw:formula": "if($1 ,-1,?f39 )"
}
},
{
"$": {
"draw:name": "f39",
"draw:formula": "if(?f0 ,-1,?f28 )"
}
},
{
"$": {
"draw:name": "f40",
"draw:formula": "$0 "
}
},
{
"$": {
"draw:name": "f41",
"draw:formula": "$1 "
}
}],
"draw:handle": [{
"$": {
"draw:handle-position": "$0 $1"
}
}]
}]
draw:enhanced path可以放在svg path元素中。你会得到这样的东西：
<svg viewBox="0 0 21600 21600" xmlns="http://www.w3.org/2000/svg" version="1.1">
<path d="M 3590 0 X 0 3590 L ?f2 ?f3 0 8970 0 12630 ?f4 ?f5 0 18010 Y 3590 21600 L ?f6 ?f7 8970 21600 12630 21600 ?f8 ?f9 18010 21600 X 21600 18010 L ?f10 ?f11 21600 12630 21600 8970 ?f12 ?f13 21600 3590 Y 18010 0 L ?f14 ?f15 12630 0 8970 0 ?f16 ?f17 Z N"/>
</svg>
然后，您应该展开所有变量（如？f2）和自变量（如$0）。查看下面的剪切笔以获取示例。然而，我不知道该如何处理路径中的"X"answers"Y"文字。我没有在这个文档中找到它们http://www.w3.org/TR/SVG/paths.html。
function extractPath(dataObj, args) {
// collect variables
var variableSource = dataObj['draw:enhanced-geometry'][0]['draw:equation'];
var variables = {};
for (var i = 0; i < variableSource.length; i++) {
var name = variableSource[i]['$']['draw:name'];
var value = variableSource[i]['$']['draw:formula'];
variables[name] = value;
}
var evaluateVariable = function(name) {
var value = evaluateExpression(variables[name]);
return value;
}
var evaluateExpression = function(expr) {
if (expr.match('if''(([^),]+),([^),]+),([^),]+)'')')) {
var literals = expr.match('if''(([^),]+),([^),]+),([^),]+)'')').slice(1);
if (evaluateLiteral(literals[0]) > 0) {
return evaluateLiteral(literals[1]);
}
else {
return evaluateLiteral(literals[2]);
}
}
else if (expr.match('abs''(([^)]+)'')')) {
var literals = expr.match('abs''(([^)]+)'')').slice(1);
return Math.abs(evaluateLiteral(literals[0]));
}
else if (expr.match('([^()-''s]+[''s]?)-([^()-''s]+[''s]?)')) {
var literals = expr.match('([^()-''s]+[''s]?)-([^()-''s]+[''s]?)').slice(1);
return evaluateLiteral(literals[0]) - evaluateLiteral(literals[1]);
}
}
var evaluateLiteral = function(literal) {
if (literal.match('^''?f[''d]+[''s]*$')) {
return evaluateVariable(literal.match('f[''d]+')[0].trim());
}
else if (literal.match('^''$[''d]+[''s]*$')) {
return args[literal.match('[''d]+')[0].trim()];
}
else if (!isNaN(parseFloat(literal.trim()))) {
return parseFloat(literal.trim());
}
console.error("couldn't evaluate literal '" + literal + "'");
return literal;
}
var pathSource = dataObj['draw:enhanced-geometry'][0]['$']['draw:enhanced-path'];
var loopLimit = 1000; // to avoid infinite loop
var path = pathSource;
while (path.match('''?f[''d]+')) {
var variable = path.match('''?f[''d]+')[0].slice(1);
var calculatedValue = evaluateVariable(variable);
path = path.replace('?' + variable, calculatedValue);
if (loopLimit-- < 0) {
console.error('loopLimit is out, looks like you have got an infinite loop here');
}
}
alert('path = "' + path + '"');
return path;
}
function onLoad() {
var jsonObj = '{"draw:enhanced-geometry": [{'
"$": {'
"svg:viewBox": "0 0 21600 21600",'
"draw:text-areas": "800 800 20800 20800",'
"draw:type": "round-rectangular-callout",'
"draw:modifiers": "3289.58566629339 27438.6415787058",'
"draw:enhanced-path": "M 3590 0 X 0 3590 L ?f2 ?f3 0 8970 0 12630 ?f4 ?f5 0 18010 Y 3590 21600 L ?f6 ?f7 8970 21600 12630 21600 ?f8 ?f9 18010 21600 X 21600 18010 L ?f10 ?f11 21600 12630 21600 8970 ?f12 ?f13 21600 3590 Y 18010 0 L ?f14 ?f15 12630 0 8970 0 ?f16 ?f17 Z N"'
},'
"draw:equation": [{'
"$": {'
"draw:name": "f0",'
"draw:formula": "$0 -10800"'
}'
},'
{'
"$": {'
"draw:name": "f1",'
"draw:formula": "$1 -10800"'
}'
},'
{'
"$": {'
"draw:name": "f2",'
"draw:formula": "if(?f18 ,$0 ,0)"'
}'
},'
{'
"$": {'
"draw:name": "f3",'
"draw:formula": "if(?f18 ,$1 ,6280)"'
}'
},'
{'
"$": {'
"draw:name": "f4",'
"draw:formula": "if(?f23 ,$0 ,0)"'
}'
},'
{'
"$": {'
"draw:name": "f5",'
"draw:formula": "if(?f23 ,$1 ,15320)"'
}'
},'
{'
"$": {'
"draw:name": "f6",'
"draw:formula": "if(?f26 ,$0 ,6280)"'
}'
},'
{'
"$": {'
"draw:name": "f7",'
"draw:formula": "if(?f26 ,$1 ,21600)"'
}'
},'
{'
"$": {'
"draw:name": "f8",'
"draw:formula": "if(?f29 ,$0 ,15320)"'
}'
},'
{'
"$": {'
"draw:name": "f9",'
"draw:formula": "if(?f29 ,$1 ,21600)"'
}'
},'
{'
"$": {'
"draw:name": "f10",'
"draw:formula": "if(?f32 ,$0 ,21600)"'
}'
},'
{'
"$": {'
"draw:name": "f11",'
"draw:formula": "if(?f32 ,$1 ,15320)"'
}'
},'
{'
"$": {'
"draw:name": "f12",'
"draw:formula": "if(?f34 ,$0 ,21600)"'
}'
},'
{'
"$": {'
"draw:name": "f13",'
"draw:formula": "if(?f34 ,$1 ,6280)"'
}'
},'
{'
"$": {'
"draw:name": "f14",'
"draw:formula": "if(?f36 ,$0 ,15320)"'
}'
},'
{'
"$": {'
"draw:name": "f15",'
"draw:formula": "if(?f36 ,$1 ,0)"'
}'
},'
{'
"$": {'
"draw:name": "f16",'
"draw:formula": "if(?f38 ,$0 ,6280)"'
}'
},'
{'
"$": {'
"draw:name": "f17",'
"draw:formula": "if(?f38 ,$1 ,0)"'
}'
},'
{'
"$": {'
"draw:name": "f18",'
"draw:formula": "if($0 ,-1,?f19 )"'
}'
},'
{'
"$": {'
"draw:name": "f19",'
"draw:formula": "if(?f1 ,-1,?f22 )"'
}'
},'
{'
"$": {'
"draw:name": "f20",'
"draw:formula": "abs(?f0 )"'
}'
},'
{'
"$": {'
"draw:name": "f21",'
"draw:formula": "abs(?f1 )"'
}'
},'
{'
"$": {'
"draw:name": "f22",'
"draw:formula": "?f20 -?f21 "'
}'
},'
{'
"$": {'
"draw:name": "f23",'
"draw:formula": "if($0 ,-1,?f24 )"'
}'
},'
{'
"$": {'
"draw:name": "f24",'
"draw:formula": "if(?f1 ,?f22 ,-1)"'
}'
},'
{'
"$": {'
"draw:name": "f25",'
"draw:formula": "$1 -21600"'
}'
},'
{'
"$": {'
"draw:name": "f26",'
"draw:formula": "if(?f25 ,?f27 ,-1)"'
}'
},'
{'
"$": {'
"draw:name": "f27",'
"draw:formula": "if(?f0 ,-1,?f28 )"'
}'
},'
{'
"$": {'
"draw:name": "f28",'
"draw:formula": "?f21 -?f20 "'
}'
},'
{'
"$": {'
"draw:name": "f29",'
"draw:formula": "if(?f25 ,?f30 ,-1)"'
}'
},'
{'
"$": {'
"draw:name": "f30",'
"draw:formula": "if(?f0 ,?f28 ,-1)"'
}'
},'
{'
"$": {'
"draw:name": "f31",'
"draw:formula": "$0 -21600"'
}'
},'
{'
"$": {'
"draw:name": "f32",'
"draw:formula": "if(?f31 ,?f33 ,-1)"'
}'
},'
{'
"$": {'
"draw:name": "f33",'
"draw:formula": "if(?f1 ,?f22 ,-1)"'
}'
},'
{'
"$": {'
"draw:name": "f34",'
"draw:formula": "if(?f31 ,?f35 ,-1)"'
}'
},'
{'
"$": {'
"draw:name": "f35",'
"draw:formula": "if(?f1 ,-1,?f22 )"'
}'
},'
{'
"$": {'
"draw:name": "f36",'
"draw:formula": "if($1 ,-1,?f37 )"'
}'
},'
{'
"$": {'
"draw:name": "f37",'
"draw:formula": "if(?f0 ,?f28 ,-1)"'
}'
},'
{'
"$": {'
"draw:name": "f38",'
"draw:formula": "if($1 ,-1,?f39 )"'
}'
},'
{'
"$": {'
"draw:name": "f39",'
"draw:formula": "if(?f0 ,-1,?f28 )"'
}'
},'
{'
"$": {'
"draw:name": "f40",'
"draw:formula": "$0 "'
}'
},'
{'
"$": {'
"draw:name": "f41",'
"draw:formula": "$1 "'
}'
}],'
"draw:handle": [{'
"$": {'
"draw:handle-position": "$0 $1"'
}'
}]'
}]}';
var obj = JSON.parse(jsonObj);
console.log(obj);
var svgTag = document.getElementsByTagName('svg')[0];
console.log(svgTag);
var viewBox = document.createAttribute('viewBox');
viewBox.value = obj['draw:enhanced-geometry'][0]['$']['svg:viewBox'];
svgTag.setAttributeNode(viewBox);
var svgPathTag = document.createElement('path');
var stroke = document.createAttribute('stroke');
stroke.value = 'black';
svgPathTag.setAttributeNode(stroke);
var strokeWidth = document.createAttribute('stroke-width');
strokeWidth.value = '3';
svgPathTag.setAttributeNode(strokeWidth);
var pathData = document.createAttribute('d');
pathData.value = extractPath(obj, [1, 2]);
svgPathTag.setAttributeNode(pathData);
svgTag.appendChild(svgPathTag);
}<body onload="onLoad()">
<svg xmlns="http://www.w3.org/2000/svg" version="1.1"/>
</body>我希望这个答案会有所帮助。
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