Start work on fonts manager

src/calibre/ebooks/oeb/polish/fonts.py

@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
+
+from calibre.ebooks.oeb.polish.container import OEB_STYLES, OEB_DOCS
+from calibre.ebooks.oeb.normalize_css import normalize_font
+
+def unquote(x):
+    if x and len(x) > 1 and x[0] == x[-1] and x[0] in ('"', "'"):
+        x = x[1:-1]
+    return x
+
+def font_family_data_from_declaration(style, families):
+    font_families = []
+    f = style.getProperty('font')
+    if f is not None:
+        f = normalize_font(f.cssValue, font_family_as_list=True).get('font-family', None)
+        if f is not None:
+            font_families = f
+    f = style.getProperty('font-family')
+    if f is not None:
+        font_families = [x.cssText for x in f]
+
+    for f in font_families:
+        f = unquote(f)
+        families[f] = families.get(f, False)
+
+def font_family_data_from_sheet(sheet, families):
+    for rule in sheet.cssRules:
+        if rule.type == rule.STYLE_RULE:
+            font_family_data_from_declaration(rule.style, families)
+        elif rule.type == rule.FONT_FACE_RULE:
+            ff = rule.style.getProperty('font-family')
+            if ff is not None:
+                for f in ff:
+                    families[unquote(f)] = True
+
+def font_family_data(container):
+    families = {}
+    for name, mt in container.mime_map.iteritems():
+        if mt in OEB_STYLES:
+            sheet = container.parsed(name)
+            font_family_data_from_sheet(sheet, families)
+        elif mt in OEB_DOCS:
+            root = container.parsed(name)
+            for style in root.xpath('//*[local-name() = "style"]'):
+                if style.text and style.get('type', 'text/css').lower() == 'text/css':
+                    sheet = container.parse_css(style.text)
+                    font_family_data_from_sheet(sheet, families)
+            for style in root.xpath('//*/@style'):
+                if style:
+                    style = container.parse_css(style, is_declaration=True)
+                    font_family_data_from_declaration(style, families)
+    return families

src/calibre/gui2/tweak_book/manage_fonts.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
+
+from PyQt4.Qt import (
+    QSplitter, QVBoxLayout, QTableView, QWidget, QSize, QTableModel)
+
+from calibre.gui2.tweak_book.widgets import Dialog
+
+class AllFonts(QTableModel):
+
+    def __init__(self, parent=None):
+        QTableModel.__init__(self, parent)
+        self.items = []
+        self.font_data = {}
+
+    def build(self):
+        self.beginResetModel()
+
+class ManageFonts(Dialog):
+
+    def __init__(self, parent=None):
+        Dialog.__init__(self, _('Manage Fonts'), 'manage-fonts', parent=parent)
+
+    def setup_ui(self):
+        self.l = l = QVBoxLayout(self)
+        self.setLayout(l)
+
+        self.bb.clear()
+        self.bb.addButton(self.bb.Close)
+        self.splitter = s = QSplitter(self)
+        l.addWidget(s), l.addWidget(self.bb)
+
+        self.fonts_view = fv = QTableView(self)
+        self.container = c = QWidget()
+        l = c.l = QVBoxLayout(c)
+        c.setLayout(l)
+        s.addWidget(fv), s.addWidget(l)
+
+    def sizeHint(self):
+        return QSize(900, 600)