fixes related to bugs (#1495693,#1500967,#1555211)

with the eqtexsvg plugin (ie LaTeX Formula):
 - uses better svg parsing technique
 - does better tmp file creation
 - uses plot-svg pstoedit driver to produce svgs
 - does not use -output-dir with latex
 - other minor fixes and improvements
thanks to Roman S Dubtsov

(bzr r2027)

2 files changed, 54 insertions, 69 deletions

diff --git a/share/extensions/eqtexsvg.inx b/share/extensions/eqtexsvg.inx
index 819f30aa0..657594a9c 100644
--- a/share/extensions/eqtexsvg.inx
+++ b/share/extensions/eqtexsvg.inx
@@ -6,7 +6,7 @@
 	<dependency type="executable" location="path">latex</dependency>
 	<dependency type="executable" location="path">dvips</dependency>
 	<dependency type="executable" location="path">pstoedit</dependency>
-	<param name="formule" type="string" _gui-text="LaTeX formula: ">\lim_{n \to \infty}\sum_{k=1}^n \frac{1}{k^2}= \frac{\pi^2}{6}</param>
+	<param name="formule" type="string" _gui-text="LaTeX formula: ">\[\frac{\pi^2}{6}=\lim_{n \to \infty}\sum_{k=1}^n \frac{1}{k^2}\]</param>
     <effect>
 		<object-type>all</object-type>
                 <effects-menu>
diff --git a/share/extensions/eqtexsvg.py b/share/extensions/eqtexsvg.py
index a16cdc625..5b88febec 100644
--- a/share/extensions/eqtexsvg.py
+++ b/share/extensions/eqtexsvg.py
@@ -1,15 +1,13 @@
 #!/usr/bin/env python
 # -*- coding: cp1252 -*-
 """
-EQTEXSVG.py
-functions for converting LATEX equation string into SVG path
-This extension need, to work properly :
-    - a TEX/LATEX distribution (MiKTEX ...)
+eqtexsvg.py
+functions for converting LaTeX equation string into SVG path
+This extension need, to work properly:
+    - a TeX/LaTeX distribution (MiKTeX ...)
     - pstoedit software: <http://www.pstoedit.net/pstoedit>
 
-Copyright (C) 2006 Julien Vitard, julienvitard@gmail.com
-
-- I will try to code XML parsing, not the hard way ;-)
+Copyright (C) 2006 Julien Vitard <julienvitard@gmail.com>
 
 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
@@ -23,88 +21,80 @@ GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 
 """
 
-import inkex, os, tempfile, xml.dom.ext, xml.dom.ext.reader.Sax
-import sys
-from xml.dom import Node
+import inkex, os, tempfile, xml.dom.minidom
 
 def create_equation_tex(filename, equation):
     tex = open(filename, 'w')
-    tex.write("""%% processed with EqTeXSVG.py
-\documentclass{article}
-\usepackage{amsmath}    
+    tex.write("""%% processed with eqtexsvg.py
+\\documentclass{article}
+\\usepackage{amsmath}
+\\usepackage{amssymb}
+\\usepackage{amsfonts}
+
 \\thispagestyle{empty}
 \\begin{document}
 """)
-    tex.write("$$\n")
     tex.write(equation)
-    tex.write("\n$$\n")
-    tex.write("\end{document}\n")
+    tex.write("\\end{document}\n")
     tex.close()
 
-def add_paths(self,group,node):
-    next = node.firstChild
-    while next is not None:
-        child = next
-        next = child.nextSibling
-
-        if child.nodeType is not Node.ELEMENT_NODE: continue
-        if child.nodeName == "title": continue
-        if child.nodeName == "desc": continue
-        if child.nodeName == "rect" and child.getAttribute("id") == "background": continue
-
-        if child.nodeName == "g":
-            svg_group = self.document.createElement('svg:g')
-            if child.hasAttribute("transform"):
-                svg_group.setAttribute("transform",child.getAttribute("transform"))
-            group.appendChild(svg_group)
-            add_paths(self,svg_group,child)
-	else:
-            group.appendChild(self.document.importNode(child,1))
-
 def svg_open(self,filename):
-    # parsing of SVG file with the equation 
-    reader = xml.dom.ext.reader.Sax.Reader()
-    stream = open(filename,'r')
-    svgdoc = reader.fromStream(stream)
-
-    group = self.document.createElement('svg:g')
+    doc_width = float(self.document.documentElement.getAttribute('width'))
+    doc_height = float(self.document.documentElement.getAttribute('height'))
+    doc_sizeH = min(doc_width,doc_height)
+    doc_sizeW = max(doc_width,doc_height)
+
+    def clone_and_rewrite(self, node_in):
+        if node_in.localName != 'svg':
+            node_out = self.document.createElement('svg:' + node_in.localName)
+            for i in range(0, node_in.attributes.length):
+                name = node_in.attributes.item(i).name
+                value = node_in.attributes.item(i).value
+                node_out.setAttribute(name, value)
+        else:
+            node_out = self.document.createElement('svg:g')
+        for c in node_in.childNodes:
+            if c.localName in ('g', 'path', 'polyline', 'polygon'):
+                child = clone_and_rewrite(self, c)
+                if c.localName == 'g':
+                    child.setAttribute('transform','matrix('+str(doc_sizeH/700.)+',0,0,'+str(-doc_sizeH/700.)+','+str(-doc_sizeH*0.25)+','+str(doc_sizeW*0.75)+')')
+                node_out.appendChild(child)
+
+        return node_out
+
+    doc = xml.dom.minidom.parse(filename)
+    svg = doc.getElementsByTagName('svg')[0]
+    group = clone_and_rewrite(self, svg)
     self.current_layer.appendChild(group)
-    child = svgdoc.firstChild
-    while child is not None:
-	if child.nodeName == "svg" and child.nodeType == Node.ELEMENT_NODE:
-            add_paths(self,group,child)
-        child = child.nextSibling
-
 
 class EQTEXSVG(inkex.Effect):
     def __init__(self):
         inkex.Effect.__init__(self)
         self.OptionParser.add_option("-f", "--formule",
-                        action="store", type="string", 
-                        dest="formule", default=10.0,
-                        help="Formule LaTeX")
+                        action="store", type="string",
+                        dest="formula", default=10.0,
+                        help="LaTeX formula")
     def effect(self):
-        base_file = os.path.join(tempfile.gettempdir(), "inkscape-latex.tmp")
-        latex_file = base_file + ".tex"
-        create_equation_tex(latex_file, self.options.formule)
 
-        out_file = os.path.join(tempfile.gettempdir(), "inkscape-latex.tmp.output")
-        os.system('latex -output-directory=' + tempfile.gettempdir() + ' ' + latex_file + '> ' + out_file)
+        base_file = os.path.join(tempfile.gettempdir(), "inkscape-latex.tmp." + str(os.getpid()))
+        latex_file = base_file + ".tex"
+        create_equation_tex(latex_file, self.options.formula)
 
+        out_file = base_file + ".output"
+        os.system('cd '  + tempfile.gettempdir() + '; latex -halt-on-error ' + latex_file + ' > ' + out_file);
         ps_file = base_file + ".ps"
         dvi_file = base_file + ".dvi"
         svg_file = base_file + ".svg"
-        os.system('dvips -q -f -E -D 600 -y 50000 -o ' + ps_file + ' ' + dvi_file)
-        os.system('pstoedit -f plot-svg -centered -dt -ssp ' + ps_file + ' ' + svg_file + '>> ' + out_file + ' 2>&1')
+        os.system('dvips -q -f -E -D 600 -y 5000 -o ' + ps_file + ' ' + dvi_file)
+        os.system('cd ' + tempfile.gettempdir() + '; pstoedit -f plot-svg -dt -ssp ' + ps_file + ' ' + svg_file + '&> ' + out_file)
 
-        # ouvrir le svg et remplacer #7F7F7F par #000000
         svg_open(self, svg_file)
 
-        # clean up
+        # Clean up
         aux_file = base_file + ".aux"
         log_file = base_file + ".log"
         os.remove(latex_file)
@@ -115,10 +105,5 @@ class EQTEXSVG(inkex.Effect):
         os.remove(svg_file)
         os.remove(out_file)
 
-#e = EQTEXSVG()
-#e.affect()
-try:        
-    e = EQTEXSVG()
-    e.affect()
-except Exception, inst:
-    sys.stderr.write(str(inst) + "\n")
+e = EQTEXSVG()
+e.affect()