1 files changed, 236 insertions, 0 deletions
diff --git a/share/extensions/replace_font.py b/share/extensions/replace_font.py
new file mode 100755
index 0000000..474dc34
--- /dev/null
+++ b/share/extensions/replace_font.py
@@ -0,0 +1,236 @@
+#!/usr/bin/env python
+# coding=utf-8
+#
+# Copyright (C) 2010 Craig Marshall, craig9 [at] 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
+# 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 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
+#
+"""
+This script finds all fonts in the current drawing that match the
+specified find font, and replaces them with the specified replacement
+font.
+
+It can also replace all fonts indiscriminately, and list all fonts
+currently being used.
+"""
+import inkex
+
+text_tags = ['{http://www.w3.org/2000/svg}tspan',
+                            '{http://www.w3.org/2000/svg}text',
+                            '{http://www.w3.org/2000/svg}flowRoot',
+                            '{http://www.w3.org/2000/svg}flowPara',
+                            '{http://www.w3.org/2000/svg}flowSpan']
+font_attributes = ['font-family', '-inkscape-font-specification']
+
+def set_font(node, new_font, style=None):
+    """
+    Sets the font attribute in the style attribute of node, using the
+    font name stored in new_font. If the style dict is open already,
+    it can be passed in, otherwise it will be optned anyway.
+
+    Returns a dirty boolean flag
+    """
+    dirty = False
+    if not style:
+        style = get_style(node)
+    if style:
+        for att in font_attributes:
+            if att in style:
+                style[att] = new_font
+                set_style(node, style)
+                dirty = True
+    return dirty
+
+def find_replace_font(node, find, replace):
+    """
+    Searches the relevant font attributes/styles of node for find, and
+    replaces them with replace.
+
+    Returns a dirty boolean flag
+    """
+    dirty = False
+    style = get_style(node)
+    if style:
+        for att in font_attributes:
+            if att in style and style[att].strip().lower() == find:
+                set_font(node, replace, style)
+                dirty = True
+    return dirty
+
+def is_styled_text(node):
+    """
+    Returns true if the tag in question is a "styled" element that
+    can hold text.
+    """
+    return node.tag in text_tags and 'style' in node.attrib
+
+def is_text(node):
+    """
+    Returns true if the tag in question is an element that
+    can hold text.
+    """
+    return node.tag in text_tags
+
+
+def get_style(node):
+    """
+    Sugar coated way to get style dict from a node
+    """
+    if 'style' in node.attrib:
+        return dict(inkex.Style.parse_str(node.attrib['style']))
+
+def set_style(node, style):
+    """
+    Sugar coated way to set the style dict, for node
+    """
+    node.attrib['style'] = str(inkex.Style(style))
+
+def get_fonts(node):
+    """
+    Given a node, returns a list containing all the fonts that
+    the node is using.
+    """
+    fonts = []
+    s = get_style(node)
+    if not s:
+        return fonts
+    for a in font_attributes:
+        if a in s:
+            fonts.append(s[a])
+    return fonts
+
+def report_replacements(num):
+    """
+    Sends a message to the end user showing success of failure
+    of the font replacement
+    """
+    if num == 0:
+        inkex.errormsg(_('Couldn\'t find anything using that font, please ensure the spelling and spacing is correct.'))
+
+def report_findings(findings):
+    """
+    Tells the user which fonts were found, if any
+    """
+    if len(findings) == 0:
+        inkex.errormsg(_("Didn't find any fonts in this document/selection."))
+    else:
+        if len(findings) == 1:
+            inkex.errormsg(_(u"Found the following font only: %s") % findings[0])
+        else:
+            inkex.errormsg(_(u"Found the following fonts:\n%s") % '\n'.join(findings))
+
+class ReplaceFont(inkex.EffectExtension):
+    """
+    Replaces all instances of one font with another
+    """
+    def add_arguments(self, pars):
+        pars.add_argument("--fr_find")
+        pars.add_argument("--fr_replace")
+        pars.add_argument("--r_replace")
+        pars.add_argument("--action")
+        pars.add_argument("--scope")
+
+    def find_child_text_items(self, node):
+        """
+        Recursive method for appending all text-type elements
+        to self.selected_items
+        """
+        if is_text(node):
+            yield node
+
+        for child in node:
+            for textchild in self.find_child_text_items(child):
+                yield textchild
+
+    def relevant_items(self, scope):
+        """
+        Depending on the scope, returns all text elements, or all
+        selected text elements including nested children
+        """
+        items = []
+        to_return = []
+
+        selected = self.svg
+        if scope == "selection_only":
+            selected = self.svg.selected.values()
+
+        for item in selected:
+            items.extend(self.find_child_text_items(item))
+
+        if not items:
+            return inkex.errormsg(_("There was nothing selected"))
+
+        return items
+
+    def find_replace(self, nodes, find, replace):
+        """
+        Walks through nodes, replacing fonts as it goes according
+        to find and replace
+        """
+        replacements = 0
+        for node in nodes:
+            if find_replace_font(node, find, replace):
+                replacements += 1
+        report_replacements(replacements)
+
+    def replace_all(self, nodes, replace):
+        """
+        Walks through nodes, setting fonts indiscriminately.
+        """
+        replacements = 0
+        for node in nodes:
+            if set_font(node, replace):
+                replacements += 1
+        report_replacements(replacements)
+
+    def list_all(self, nodes):
+        """
+        Walks through nodes, building a list of all fonts found, then
+        reports to the user with that list
+        """
+        fonts_found = []
+        for node in nodes:
+            for f in get_fonts(node):
+                if not f in fonts_found:
+                    fonts_found.append(f)
+        report_findings(sorted(fonts_found))
+
+    def effect(self):
+        if not self.options.action:
+            return inkex.errormsg("Nothing to do, no action specified.")
+        action = self.options.action.strip("\"") # TODO Is this a bug? (Extra " characters)
+        scope = self.options.scope
+
+        relevant_items = self.relevant_items(scope)
+
+        if action == "find_replace":
+            find = self.options.fr_find
+            if find is None or find == "":
+                return inkex.errormsg(_("Please enter a search string in the find box."))
+            find = find.strip().lower()
+            replace = self.options.fr_replace
+            if replace is None or replace == "":
+                return inkex.errormsg(_("Please enter a replacement font in the replace with box."))
+            self.find_replace(relevant_items, find, replace)
+        elif action == "replace_all":
+            replace = self.options.r_replace
+            if replace is None or replace == "":
+                return inkex.errormsg(_("Please enter a replacement font in the replace all box."))
+            self.replace_all(relevant_items, replace)
+        elif action == "list_only":
+            self.list_all(relevant_items)
+
+if __name__ == "__main__":
+    ReplaceFont().run()