Allow setting the color of all columns with a single rule in Preferences->Look & Feel->Column Coloring

src/calibre/gui2/library/models.py

@@ -27,6 +27,7 @@ from calibre import strftime, isbytestring
 from calibre.constants import filesystem_encoding, DEBUG
 from calibre.gui2.library import DEFAULT_SORT
 from calibre.utils.localization import calibre_langcode_to_name
+from calibre.library.coloring import color_row_key
 
 def human_readable(size, precision=1):
     """ Convert a size in bytes into megabytes """
@@ -84,6 +85,7 @@ class BooksModel(QAbstractTableModel): # {{{
         self.headers = {}
         self.alignment_map = {}
         self.color_cache = defaultdict(dict)
+        self.color_row_fmt_cache = None
         self.buffer_size = buffer
         self.metadata_backup = None
         self.bool_yes_icon = QIcon(I('ok.png'))
@@ -169,12 +171,14 @@ class BooksModel(QAbstractTableModel): # {{{
 
     def refresh_ids(self, ids, current_row=-1):
         self.color_cache = defaultdict(dict)
+        self.color_row_fmt_cache = None
         rows = self.db.refresh_ids(ids)
         if rows:
             self.refresh_rows(rows, current_row=current_row)
 
     def refresh_rows(self, rows, current_row=-1):
         self.color_cache = defaultdict(dict)
+        self.color_row_fmt_cache = None
         for row in rows:
             if row == current_row:
                 self.new_bookdisplay_data.emit(
@@ -206,6 +210,7 @@ class BooksModel(QAbstractTableModel): # {{{
 
     def count_changed(self, *args):
         self.color_cache = defaultdict(dict)
+        self.color_row_fmt_cache = None
         self.count_changed_signal.emit(self.db.count())
 
     def row_indices(self, index):
@@ -337,6 +342,7 @@ class BooksModel(QAbstractTableModel): # {{{
 
     def reset(self):
         self.color_cache = defaultdict(dict)
+        self.color_row_fmt_cache = None
         QAbstractTableModel.reset(self)
 
     def resort(self, reset=True):
@@ -727,17 +733,21 @@ class BooksModel(QAbstractTableModel): # {{{
                 return QVariant(QColor('lightgreen'))
         elif role == Qt.ForegroundRole:
             key = self.column_map[col]
-            mi = None
-            for k, fmt in self.db.prefs['column_color_rules']:
-                if k != key:
-                    continue
-                id_ = self.id(index)
+            self._mi_for_col_color = None
+            id_ = self.id(index)
+
+            if self.color_row_fmt_cache is None:
+                d = dict(self.db.prefs['column_color_rules'])
+                self.color_row_fmt_cache = d.get(color_row_key, '')
+
+            def get_column_color(key, fmt):
                 if id_ in self.color_cache:
                     if key in self.color_cache[id_]:
                         return self.color_cache[id_][key]
                 try:
-                    if mi is None:
-                        mi = self.db.get_metadata(id_, index_is_id=True)
+                    if self._mi_for_col_color is None:
+                        self._mi_for_col_color = self.db.get_metadata(id_, index_is_id=True)
+                    mi = self._mi_for_col_color
                     color = self.formatter.safe_format(fmt, mi, '', mi)
                     if color in self.colors:
                         color = QColor(color)
@@ -746,7 +756,15 @@ class BooksModel(QAbstractTableModel): # {{{
                             self.color_cache[id_][key] = color
                             return color
                 except:
-                    continue
+                    pass
+
+            for k, fmt in self.db.prefs['column_color_rules']:
+                if k == key:
+                    col = get_column_color(key, fmt)
+                    if col is not None:
+                        self._mi_for_col_color = None
+                        return col
+
             if self.is_custom_column(key) and \
                         self.custom_columns[key]['datatype'] == 'enumeration':
                 cc = self.custom_columns[self.column_map[col]]['display']
@@ -757,9 +775,19 @@ class BooksModel(QAbstractTableModel): # {{{
                     try:
                         color = QColor(colors[values.index(txt)])
                         if color.isValid():
+                            self._mi_for_col_color = None
                             return QVariant(color)
                     except:
                         pass
+
+            if self.color_row_fmt_cache:
+                key = color_row_key
+                col = get_column_color(key, self.color_row_fmt_cache)
+                if col is not None:
+                    self._mi_for_col_color = None
+                    return col
+
+            self._mi_for_col_color = None
             return NONE
         elif role == Qt.DecorationRole:
             if self.column_to_dc_decorator_map[col] is not None:

src/calibre/gui2/preferences/coloring.py

@@ -19,10 +19,12 @@ from calibre.gui2 import error_dialog
 from calibre.gui2.dialogs.template_dialog import TemplateDialog
 from calibre.gui2.metadata.single_download import RichTextDelegate
 from calibre.library.coloring import (Rule, conditionable_columns,
-    displayable_columns, rule_from_template)
+    displayable_columns, rule_from_template, color_row_key)
 from calibre.utils.localization import lang_map
 from calibre.utils.icu import lower
 
+all_columns_string = _('All Columns')
+
 class ConditionEditor(QWidget): # {{{
 
     ACTION_MAP = {
@@ -312,12 +314,10 @@ class RuleEditor(QDialog): # {{{
             b.setSizeAdjustPolicy(b.AdjustToMinimumContentsLengthWithIcon)
             b.setMinimumContentsLength(15)
 
-        for key in sorted(
-                displayable_columns(fm),
-                key=sort_key):
-            name = fm[key]['name']
+        for key in sorted(displayable_columns(fm), key=sort_key):
+            name = all_columns_string if key == color_row_key else fm[key]['name']
             if name:
-                self.column_box.addItem(key, key)
+                self.column_box.addItem(name, key)
         self.column_box.setCurrentIndex(0)
 
         self.color_box.addItems(QColor.colorNames())
@@ -427,7 +427,8 @@ class RulesModel(QAbstractListModel): # {{{
             col, rule = self.rules[row]
         except:
             return None
-
+        if col == color_row_key:
+            col = all_columns_string
         if role == Qt.DisplayRole:
             return self.rule_to_html(col, rule)
         if role == Qt.UserRole:

src/calibre/library/coloring.py

@@ -11,6 +11,8 @@ __docformat__ = 'restructuredtext en'
 import binascii, re, json
 from textwrap import dedent
 
+color_row_key = '*row'
+
 class Rule(object): # {{{
 
     SIGNATURE = '# BasicColorRule():'
@@ -205,6 +207,7 @@ def conditionable_columns(fm):
                 yield key
 
 def displayable_columns(fm):
+    yield color_row_key
     for key in fm.displayable_field_keys():
         if key not in ('sort', 'author_sort', 'comments', 'formats',
                 'identifiers', 'path'):