From ffdfd6ccdf162870439290806dc06583bcc6644d Mon Sep 17 00:00:00 2001
From: Travis Abendshien <lvnvtravis@gmail.com>
Date: Fri, 19 Jul 2024 20:25:14 -0700
Subject: [PATCH] fix(ui): large font previews follow app theme

---
 tagstudio/src/qt/helpers/color_overlay.py  |  8 ++--
 tagstudio/src/qt/widgets/thumb_renderer.py | 48 ++++++++++++----------
 2 files changed, 31 insertions(+), 25 deletions(-)

diff --git a/tagstudio/src/qt/helpers/color_overlay.py b/tagstudio/src/qt/helpers/color_overlay.py
index 9bb474c2..c468c2b3 100644
--- a/tagstudio/src/qt/helpers/color_overlay.py
+++ b/tagstudio/src/qt/helpers/color_overlay.py
@@ -16,18 +16,20 @@ _THEME_DARK_BG: str = "#000000DD"
 _THEME_LIGHT_BG: str = "#FFFFFF55"
 
 
-def theme_fg_overlay(image: Image.Image) -> Image.Image:
+def theme_fg_overlay(image: Image.Image, use_alpha: bool = True) -> Image.Image:
     """
     Overlay the foreground theme color onto an image.
 
     Args:
         image (Image): The PIL Image object to apply an overlay to.
     """
+    dark_fg: str = _THEME_DARK_FG[:-2] if not use_alpha else _THEME_DARK_FG
+    light_fg: str = _THEME_LIGHT_FG[:-2] if not use_alpha else _THEME_LIGHT_FG
 
     overlay_color = (
-        _THEME_DARK_FG
+        dark_fg
         if QGuiApplication.styleHints().colorScheme() is Qt.ColorScheme.Dark
-        else _THEME_LIGHT_FG
+        else light_fg
     )
 
     im = Image.new(mode="RGBA", size=image.size, color=overlay_color)
diff --git a/tagstudio/src/qt/widgets/thumb_renderer.py b/tagstudio/src/qt/widgets/thumb_renderer.py
index e1bd4004..6f2976e4 100644
--- a/tagstudio/src/qt/widgets/thumb_renderer.py
+++ b/tagstudio/src/qt/widgets/thumb_renderer.py
@@ -232,29 +232,10 @@ class ThumbRenderer(QObject):
                 elif _filepath.suffix.lower() in FONT_TYPES:
                     if gradient:
                         # Handles small thumbnails
-                        image = self._font_preview_small(_filepath, adj_size)
+                        image = self._font_preview_short(_filepath, adj_size)
                     else:
                         # Handles big thumbnails and renders a sample text in multiple font sizes.
-                        # Scale the sample font sizes to the preview image
-                        # resolution,assuming the sizes are tuned for 256px.
-                        scaled_sizes: list[int] = [
-                            math.floor(x * (adj_size / 256)) for x in FONT_SAMPLE_SIZES
-                        ]
-                        bg = Image.new("RGB", (adj_size, adj_size), color="#1e1e1e")
-                        draw = ImageDraw.Draw(bg)
-                        lines_of_padding = 2
-                        y_offset = 0
-
-                        for font_size in scaled_sizes:
-                            font = ImageFont.truetype(_filepath, size=font_size)
-                            text_wrapped: str = wrap_full_text(
-                                FONT_SAMPLE_TEXT, font=font, width=adj_size, draw=draw
-                            )
-                            draw.multiline_text((0, y_offset), text_wrapped, font=font)
-                            y_offset += (
-                                len(text_wrapped.split("\n")) + lines_of_padding
-                            ) * draw.textbbox((0, 0), "A", font=font)[-1]
-                        image = bg
+                        image = self._font_preview_long(_filepath, adj_size)
                 # Audio ========================================================
                 elif ext in AUDIO_TYPES:
                     image = self._album_artwork(_filepath, ext)
@@ -523,7 +504,7 @@ class ThumbRenderer(QObject):
             )
         return image
 
-    def _font_preview_small(self, filepath: Path, size: int) -> Image.Image:
+    def _font_preview_short(self, filepath: Path, size: int) -> Image.Image:
         """Renders a small font preview ("Aa") thumbnail from a font file."""
         bg = Image.new("RGB", (size, size), color="#000000")
         raw = Image.new("RGB", (size * 2, size * 2), color="#000000")
@@ -573,6 +554,29 @@ class ThumbRenderer(QObject):
         )
         return self._apply_overlay_color(bg, "purple")
 
+    def _font_preview_long(self, filepath: Path, size: int) -> Image.Image:
+        """Renders a large font preview ("Alphabet") thumbnail from a font file."""
+        # Scale the sample font sizes to the preview image
+        # resolution,assuming the sizes are tuned for 256px.
+        scaled_sizes: list[int] = [
+            math.floor(x * (size / 256)) for x in FONT_SAMPLE_SIZES
+        ]
+        bg = Image.new("RGBA", (size, size), color="#00000000")
+        draw = ImageDraw.Draw(bg)
+        lines_of_padding = 2
+        y_offset = 0
+
+        for font_size in scaled_sizes:
+            font = ImageFont.truetype(filepath, size=font_size)
+            text_wrapped: str = wrap_full_text(
+                FONT_SAMPLE_TEXT, font=font, width=size, draw=draw
+            )
+            draw.multiline_text((0, y_offset), text_wrapped, font=font)
+            y_offset += (
+                len(text_wrapped.split("\n")) + lines_of_padding
+            ) * draw.textbbox((0, 0), "A", font=font)[-1]
+        return theme_fg_overlay(bg, use_alpha=False)
+
     def _apply_overlay_color(self, image: Image.Image, color: str) -> Image.Image:
         """Apply a gradient effect over an an image.
         Red channel for foreground, green channel for outline, none for background."""