Merge pull request 'Add options for hiding some elements (aka lyrics mode)' (#4) from no-chords into master

Reviewed-on: raoul/python-chordpro#4

src/chordpro/renderers/html.py

@@ -46,6 +46,7 @@ STYLE_KEYS = [
     'is_bold',
     'is_centered',
     'is_upper',
+    'is_hidden',
     'indent'
 ]
 HTML_OPTIONS = {
@@ -223,6 +224,12 @@ HTML_OPTIONS = {
         'default': True,
         'group': 'stanza_heading'
     },
+    'stanza_heading_is_hidden': {
+        'description': 'Hide the stanza headings',
+        'type': bool,
+        'default': False,
+        'group': 'stanza_heading'
+    },
     'verse_font': {
         'description': 'The font for the verses',
         'type': str,
@@ -271,6 +278,12 @@ HTML_OPTIONS = {
         'default': True,
         'group': 'verse_heading'
     },
+    'verse_heading_is_hidden': {
+        'description': 'Hide the verse headings',
+        'type': bool,
+        'default': False,
+        'group': 'verse_heading'
+    },
     'chorus_font': {
         'description': 'The font for the choruses',
         'type': str,
@@ -319,6 +332,12 @@ HTML_OPTIONS = {
         'default': True,
         'group': 'chorus_heading'
     },
+    'chorus_heading_is_hidden': {
+        'description': 'Hide the chorus headings',
+        'type': bool,
+        'default': False,
+        'group': 'chorus_heading'
+    },
     'bridge_font': {
         'description': 'The font for the bridge',
         'type': str,
@@ -367,6 +386,12 @@ HTML_OPTIONS = {
         'default': True,
         'group': 'bridge_heading'
     },
+    'bridge_heading_is_hidden': {
+        'description': 'Hide the bridge headings',
+        'type': bool,
+        'default': False,
+        'group': 'bridge_heading'
+    },
     'chord_font': {
         'description': 'The font for the chord',
         'type': str,
@@ -390,7 +415,13 @@ HTML_OPTIONS = {
         'type': bool,
         'default': True,
         'group': 'chord'
-    }
+    },
+    'chord_is_hidden': {
+        'description': 'Hide all the chords',
+        'type': bool,
+        'default': False,
+        'group': 'chord'
+    },
 }
 _OPTION_GROUPS = []
 
@@ -411,7 +442,7 @@ def get_option_groups():
     return _OPTION_GROUPS
 
 
-def make_style(name, font=None, size=None, is_bold=None, is_centered=None, is_upper=None, indent=None):
+def make_style(name, font=None, size=None, is_bold=None, is_centered=None, is_upper=None, is_hidden=False, indent=None):
     """Build a CSS style"""
     styles = []
     if name == 'default':
@@ -428,6 +459,9 @@ def make_style(name, font=None, size=None, is_bold=None, is_centered=None, is_up
         styles.append('  text-align: center;')
     if is_upper:
         styles.append('  text-transform: uppercase;')
+    if is_hidden:
+        styles.append('  display: none !important;')
+        styles.append('  visibility: hidden !important;')
     if indent:
         styles.append('  margin-left: {indent}rem;'.format(indent=indent))
     if styles:
@@ -447,9 +481,9 @@ def generate_option_styles(options):
             name = '{group}_{key}'.format(group=group, key=key)
             if name not in HTML_OPTIONS:
                 continue
-            option = options.get(name, HTML_OPTIONS[name]['default'])
+            value = options.get(name, HTML_OPTIONS[name]['default'])
-            if option:
+            if value is not None:
-                kwargs[key] = option
+                kwargs[key] = value
         styles.append(make_style(group.replace('_', '-'), **kwargs))
     return styles