Edit book: Allow linking of stylesheets into HTML files automatically. Right click ont he selected HTML files in the File browser and choose "Link stylesheets" to have the <link> tags for the shhets automatically inserted.

manual/edit.rst

@@ -171,6 +171,12 @@ book by clicking :guilabel:`File->New file`. This lets you either import a file
 by clicking the :guilabel:`Import resource file` button or create a new blank html file
 or stylesheet by simply entering the file name into the box for the new file.
 
+Linking stylesheets to HTML files efficiently
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+As a convenience, you can select multiple HTML files in the Files Browser,
+right click and choose Link stylesheets to have |app| automatically insert the
+<link> tags for those stylesheets into all the selected HTML files.
 
 Search & Replace
 -------------------

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

@@ -37,3 +37,28 @@ class CommentFinder(object):
         q = bisect(self.starts, offset) - 1
         return q >= 0 and self.starts[q] <= offset <= self.ends[q]
 
+def link_stylesheets(container, names, sheets, mtype='text/css'):
+    from calibre.ebooks.oeb.base import XPath, XHTML
+    changed_names = set()
+    snames = set(sheets)
+    lp = XPath('//h:link[@href]')
+    hp = XPath('//h:head')
+    for name in names:
+        root = container.parsed(name)
+        existing = {container.href_to_name(l.get('href'), name) for l in lp(root) if (l.get('type', mtype) or mtype) == mtype}
+        extra = snames - existing
+        if extra:
+            changed_names.add(name)
+            try:
+                parent = hp(root)[0]
+            except (TypeError, IndexError):
+                parent = XHTML('head')
+                container.insert_into_xml(root, parent, index=0)
+            for sheet in sheets:
+                if sheet in extra:
+                    container.insert_into_xml(
+                        parent, parent.makeelement(XHTML('link'), rel='stylesheet', type=mtype,
+                                                   href=container.name_to_href(sheet, name)))
+            container.dirty(name)
+
+    return changed_names

src/calibre/gui2/tweak_book/boss.py

@@ -24,6 +24,7 @@ from calibre.ebooks.oeb.polish.pretty import fix_all_html, pretty_all
 from calibre.ebooks.oeb.polish.replace import rename_files, replace_file
 from calibre.ebooks.oeb.polish.split import split, merge, AbortError
 from calibre.ebooks.oeb.polish.toc import remove_names_from_toc, find_existing_toc
+from calibre.ebooks.oeb.polish.utils import link_stylesheets
 from calibre.gui2 import error_dialog, choose_files, question_dialog, info_dialog, choose_save_file
 from calibre.gui2.dialogs.confirm_delete import confirm
 from calibre.gui2.tweak_book import set_current_container, current_container, tprefs, actions, editors
@@ -96,6 +97,7 @@ class Boss(QObject):
         fl.mark_requested.connect(self.mark_requested)
         fl.export_requested.connect(self.export_requested)
         fl.replace_requested.connect(self.replace_requested)
+        fl.link_stylesheets_requested.connect(self.link_stylesheets_requested)
         self.gui.central.current_editor_changed.connect(self.apply_current_editor_state)
         self.gui.central.close_requested.connect(self.editor_close_requested)
         self.gui.central.search_panel.search_triggered.connect(self.search)
@@ -228,12 +230,13 @@ class Boss(QObject):
                 self.gui.file_list.request_edit(ef)
             self.gui.toc_view.update_if_visible()
 
-    def update_editors_from_container(self, container=None):
+    def update_editors_from_container(self, container=None, names=None):
         c = container or current_container()
         for name, ed in tuple(editors.iteritems()):
             if c.has_name(name):
-                ed.replace_data(c.raw_data(name))
+                if names is None or name in names:
-                ed.is_synced_to_container = True
+                    ed.replace_data(c.raw_data(name))
+                    ed.is_synced_to_container = True
             else:
                 self.close_editor(name)
 
@@ -830,6 +833,15 @@ class Boss(QObject):
         if master in editors:
             self.show_editor(master)
 
+    @in_thread_job
+    def link_stylesheets_requested(self, names, sheets):
+        self.commit_all_editors_to_container()
+        self.add_savepoint(_('Link stylesheets'))
+        changed_names = link_stylesheets(current_container(), names, sheets)
+        if changed_names:
+            self.update_editors_from_container(names=changed_names)
+            self.set_modified()
+
     @in_thread_job
     def export_requested(self, name, path):
         if name in editors and not editors[name].is_synced_to_container:

src/calibre/gui2/tweak_book/file_list.py

@@ -16,7 +16,7 @@ from PyQt4.Qt import (
     QWidget, QTreeWidget, QGridLayout, QSize, Qt, QTreeWidgetItem, QIcon, QFont,
     QStyledItemDelegate, QStyle, QPixmap, QPainter, pyqtSignal, QMenu, QTimer,
     QDialogButtonBox, QDialog, QLabel, QLineEdit, QVBoxLayout, QScrollArea,
-    QRadioButton, QFormLayout, QSpinBox)
+    QRadioButton, QFormLayout, QSpinBox, QListWidget, QListWidgetItem)
 
 from calibre import human_readable, sanitize_file_name_unicode
 from calibre.ebooks.oeb.base import OEB_STYLES, OEB_DOCS
@@ -120,6 +120,7 @@ class FileList(QTreeWidget):
     mark_requested = pyqtSignal(object, object)
     export_requested = pyqtSignal(object, object)
     replace_requested = pyqtSignal(object, object, object, object)
+    link_stylesheets_requested = pyqtSignal(object, object)
 
     def __init__(self, parent=None):
         QTreeWidget.__init__(self, parent)
@@ -412,6 +413,9 @@ class FileList(QTreeWidget):
         for items in selected_map.itervalues():
             items.sort(key=self.index_of_name)
 
+        if selected_map['text']:
+            m.addAction(QIcon(I('format-text-color.png')), _('Link &stylesheets...'), partial(self.link_stylesheets, selected_map['text']))
+
         if len(selected_map['text']) > 1:
             m.addAction(QIcon(I('merge.png')), _('&Merge selected text files'), partial(self.start_merge, 'text', selected_map['text']))
         if len(selected_map['styles']) > 1:
@@ -611,6 +615,40 @@ class FileList(QTreeWidget):
         nname = nname + '.' + ext.lower()
         self.replace_requested.emit(name, path, nname, force_mt)
 
+    def link_stylesheets(self, names):
+        s = self.categories['styles']
+        sheets = [unicode(s.child(i).data(0, NAME_ROLE).toString()) for i in xrange(s.childCount())]
+        if not sheets:
+            return error_dialog(self, _('No stylesheets'), _(
+                'This book currently has no stylesheets. You must first create a stylesheet'
+                ' before linking it.'), show=True)
+        d = QDialog(self)
+        d.l = l = QVBoxLayout(d)
+        d.setLayout(l)
+        d.setWindowTitle(_('Choose stylesheets'))
+        d.la = la = QLabel(_('Choose the stylesheets to link. Drag and drop to re-arrange'))
+
+        la.setWordWrap(True)
+        l.addWidget(la)
+        d.s = s = QListWidget(d)
+        l.addWidget(s)
+        s.setDragEnabled(True)
+        s.setDropIndicatorShown(True)
+        s.setDragDropMode(self.InternalMove)
+        s.setAutoScroll(True)
+        s.setDefaultDropAction(Qt.MoveAction)
+        for name in sheets:
+            i = QListWidgetItem(name, s)
+            flags = Qt.ItemIsEnabled | Qt.ItemIsUserCheckable | Qt.ItemIsDragEnabled | Qt.ItemIsSelectable
+            i.setFlags(flags)
+            i.setCheckState(Qt.Checked)
+        d.bb = bb = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
+        bb.accepted.connect(d.accept), bb.rejected.connect(d.reject)
+        l.addWidget(bb)
+        if d.exec_() == d.Accepted:
+            sheets = [unicode(s.item(i).text()) for i in xrange(s.count()) if s.item(i).checkState() == Qt.Checked]
+            if sheets:
+                self.link_stylesheets_requested.emit(names, sheets)
 
 class NewFileDialog(QDialog):  # {{{
 
@@ -729,6 +767,7 @@ class FileListWidget(QWidget):
     mark_requested = pyqtSignal(object, object)
     export_requested = pyqtSignal(object, object)
     replace_requested = pyqtSignal(object, object, object, object)
+    link_stylesheets_requested = pyqtSignal(object, object)
 
     def __init__(self, parent=None):
         QWidget.__init__(self, parent)
@@ -736,10 +775,9 @@ class FileListWidget(QWidget):
         self.file_list = FileList(self)
         self.layout().addWidget(self.file_list)
         self.layout().setContentsMargins(0, 0, 0, 0)
-        for x in ('delete_requested', 'reorder_spine', 'rename_requested',
+        for k, o in vars(self.__class__).iteritems():
-                  'edit_file', 'merge_requested', 'mark_requested',
+            if isinstance(o, pyqtSignal) and hasattr(self.file_list, k):
-                  'export_requested', 'replace_requested', 'bulk_rename_requested'):
+                getattr(self.file_list, k).connect(getattr(self, k))
-            getattr(self.file_list, x).connect(getattr(self, x))
         for x in ('delete_done', 'select_name', 'request_edit', 'mark_name_as_current', 'clear_currently_edited_name'):
             setattr(self, x, getattr(self.file_list, x))