Implement multiple emblems for the file browser

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

@@ -33,6 +33,21 @@ def set_azw3_cover(container, cover_path, report):
     container.dirty(container.opf_name)
     report('Cover updated' if found else 'Cover inserted')
 
+def get_azw3_raster_cover_name(container):
+    items = container.opf_xpath('//opf:guide/opf:reference[@href and contains(@type, "cover")]')
+    if items:
+        return container.href_to_name(items[0].get('href'))
+
+def get_raster_cover_name(container):
+    if container.book_type == 'azw3':
+        return get_azw3_raster_cover_name(container)
+    return find_cover_image(container, strict=True)
+
+def get_cover_page_name(container):
+    if container.book_type == 'azw3':
+        return
+    return find_cover_page(container)
+
 def set_cover(container, cover_path, report):
     if container.book_type == 'azw3':
         set_azw3_cover(container, cover_path, report)
@@ -52,7 +67,7 @@ COVER_TYPES = {
     'other.ms-coverimage', 'other.ms-thumbimage-standard',
     'other.ms-thumbimage', 'thumbimagestandard', 'cover'}
 
-def find_cover_image(container):
+def find_cover_image(container, strict=False):
     'Find a raster image marked as a cover in the OPF'
     manifest_id_map = container.manifest_id_map
     mm = container.mime_map
@@ -69,6 +84,9 @@ def find_cover_image(container):
         if ref_type.lower() == 'cover' and is_raster_image(mm.get(name, None)):
             return name
 
+    if strict:
+        return
+
     # Find the largest image from all possible guide cover items
     largest_cover = (None, 0)
     for ref_type, name in guide_type_map.iteritems():

src/calibre/gui2/tweak_book/file_list.py

@@ -8,10 +8,11 @@ __copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
 
 from PyQt4.Qt import (
     QWidget, QTreeWidget, QGridLayout, QSize, Qt, QTreeWidgetItem, QIcon,
-    QStyledItemDelegate, QStyle)
+    QStyledItemDelegate, QStyle, QPixmap, QPainter)
 
 from calibre import guess_type, human_readable
 from calibre.ebooks.oeb.base import OEB_STYLES
+from calibre.ebooks.oeb.polish.cover import get_cover_page_name, get_raster_cover_name
 from calibre.gui2.tweak_book import current_container
 
 TOP_ICON_SIZE = 24
@@ -20,12 +21,6 @@ NBSP = '\xa0'
 
 class ItemDelegate(QStyledItemDelegate):  # {{{
 
-    def initStyleOption(self, option, index):
-        QStyledItemDelegate.initStyleOption(self, option, index)
-        top_level = not index.parent().isValid()
-        if top_level:
-            option.decorationSize = QSize(TOP_ICON_SIZE, TOP_ICON_SIZE)
-
     def sizeHint(self, option, index):
         ans = QStyledItemDelegate.sizeHint(self, option, index)
         top_level = not index.parent().isValid()
@@ -60,6 +55,7 @@ class FileList(QTreeWidget):
         self.delegate = ItemDelegate(self)
         self.setTextElideMode(Qt.ElideMiddle)
         self.setItemDelegate(self.delegate)
+        self.setIconSize(QSize(16, 16))
         self.header().close()
         self.setDragEnabled(True)
         self.setSelectionMode(self.ExtendedSelection)
@@ -76,22 +72,33 @@ class FileList(QTreeWidget):
         self.setContextMenuPolicy(Qt.CustomContextMenu)
         self.customContextMenuRequested.connect(self.show_context_menu)
         self.root = self.invisibleRootItem()
+        self.emblem_cache = {}
+        self.rendered_emblem_cache = {}
+        self.top_level_pixmap_cache = {
+            name : QPixmap(I(icon)).scaled(TOP_ICON_SIZE, TOP_ICON_SIZE, transformMode=Qt.SmoothTransformation)
+            for name, icon in {
+                'text':'keyboard-prefs.png',
+                'styles':'lookfeel.png',
+                'fonts':'font.png',
+                'misc':'mimetypes/dir.png',
+                'images':'view-image.png',
+            }.iteritems()}
 
     def build(self, container):
         self.clear()
         self.root = self.invisibleRootItem()
         self.root.setFlags(Qt.ItemIsDragEnabled)
         self.categories = {}
-        for category, text, icon in (
+        for category, text in (
-            ('text', _('Text'), 'keyboard-prefs.png'),
+            ('text', _('Text')),
-            ('styles', _('Styles'), 'lookfeel.png'),
+            ('styles', _('Styles')),
-            ('images', _('Images'), 'view-image.png'),
+            ('images', _('Images')),
-            ('fonts', _('Fonts'), 'font.png'),
+            ('fonts', _('Fonts')),
-            ('misc', _('Miscellaneous'), 'mimetypes/dir.png'),
+            ('misc', _('Miscellaneous')),
         ):
             self.categories[category] = i = QTreeWidgetItem(self.root, 0)
             i.setText(0, text)
-            i.setIcon(0, QIcon(I(icon)))
+            i.setData(0, Qt.DecorationRole, self.top_level_pixmap_cache[category])
             f = i.font(0)
             f.setBold(True)
             i.setFont(0, f)
@@ -111,16 +118,55 @@ class FileList(QTreeWidget):
             seen[text] = item
             return text
 
+        cover_page_name = get_cover_page_name(container)
+        cover_image_name = get_raster_cover_name(container)
+        manifested_names = set()
+        for names in container.manifest_type_map.itervalues():
+            manifested_names |= set(names)
+
+        def add_emblems(item, name, linear=True):
+            emblems = []
+            if name in {cover_page_name, cover_image_name}:
+                emblems.append('default_cover.png')
+            if name not in manifested_names and name not in {container.opf_name, 'META_INF/container.xml', 'META_INF/encryption.xml'}:
+                emblems.append('dialog_question.png')
+            if not linear:
+                emblems.append('arrow-down.png')
+            emblems = tuple(emblems)
+            if not emblems:
+                return
+            icon = self.rendered_emblem_cache.get(emblems, None)
+            if icon is None:
+                pixmaps = []
+                for emblem in emblems:
+                    pm = self.emblem_cache.get(emblem, None)
+                    if pm is None:
+                        pm = self.emblem_cache[emblem] = QPixmap(
+                            I(emblem)).scaled(self.iconSize(), transformMode=Qt.SmoothTransformation)
+                    pixmaps.append(pm)
+                num = len(pixmaps)
+                w, h = pixmaps[0].width(), pixmaps[0].height()
+                if num == 1:
+                    icon = self.rendered_emblem_cache[emblems] = QIcon(pixmaps[0])
+                else:
+                    canvas = QPixmap((num * w) + ((num-1)*2), h)
+                    canvas.fill(Qt.transparent)
+                    painter = QPainter(canvas)
+                    for i, pm in enumerate(pixmaps):
+                        painter.drawPixmap(i * (w + 2), 0, pm)
+                    painter.end()
+                    icon = self.rendered_emblem_cache[emblems] = canvas
+            item.setData(0, Qt.DecorationRole, icon)
+
         for name, linear in container.spine_names:
             processed.add(name)
             i = QTreeWidgetItem(self.categories['text'], 1)
             prefix = '' if linear else '[nl] '
-            if not linear:
-                i.setIcon(self.non_linear_icon)
             i.setText(0, prefix + get_display_name(name, i))
             i.setStatusTip(0, _('Full path: ') + name)
             i.setFlags(Qt.ItemIsEnabled | Qt.ItemIsDragEnabled | Qt.ItemIsSelectable)
             i.setData(0, NAME_ROLE, name)
+            add_emblems(i, name, linear=linear)
 
         font_types = {guess_type('a.'+x)[0] for x in ('ttf', 'otf', 'woff')}
 
@@ -148,6 +194,7 @@ class FileList(QTreeWidget):
             i.setStatusTip(0, _('Full path: ') + name)
             i.setFlags(Qt.ItemIsEnabled | Qt.ItemIsSelectable)
             i.setData(0, NAME_ROLE, name)
+            add_emblems(i, name)
 
         for c in self.categories.itervalues():
             self.expandItem(c)