endline handling in strofa

[librarian.git] / librarian / cover.py

diff --git a/librarian/cover.py b/librarian/cover.py
index 27f7a70..b53de30 100644 (file)
--- a/librarian/cover.py
+++ b/librarian/cover.py
@@ -3,11 +3,86 @@
 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #

+import re

 import Image, ImageFont, ImageDraw, ImageFilter
 import Image, ImageFont, ImageDraw, ImageFilter

-from librarian import get_resource
+from StringIO import StringIO
+from librarian import get_resource, IOFile
+
+
+class TextBox(object):
+    """Creates an Image with a series of centered strings."""
+
+    SHADOW_X = 3
+    SHADOW_Y = 3
+    SHADOW_BLUR = 3
+
+    def __init__(self, max_width, max_height, padding_x=None, padding_y=None):
+        if padding_x is None:
+            padding_x = self.SHADOW_X + self.SHADOW_BLUR
+        if padding_y is None:
+            padding_y = self.SHADOW_Y + self.SHADOW_BLUR
+
+        self.max_width = max_width
+        self.max_text_width = max_width - 2 * padding_x
+        self.padding_y = padding_y
+        self.height = padding_y
+        self.img = Image.new('RGBA', (max_width, max_height))
+        self.draw = ImageDraw.Draw(self.img)
+        self.shadow_img = None
+        self.shadow_draw = None
+
+    def skip(self, height):
+        """Skips some vertical space."""
+        self.height += height
+
+    def text(self, text, color='#000', font=None, line_height=20,
+             shadow_color=None):
+        """Writes some centered text."""
+        text = re.sub(r'\s+', ' ', text)
+        if shadow_color:
+            if not self.shadow_img:
+                self.shadow_img = Image.new('RGBA', self.img.size)
+                self.shadow_draw = ImageDraw.Draw(self.shadow_img)
+        while text:
+            line = text
+            line_width = self.draw.textsize(line, font=font)[0]
+            while line_width > self.max_text_width:
+                parts = line.rsplit(' ', 1)
+                if len(parts) == 1:
+                    line_width = self.max_text_width
+                    break
+                line = parts[0]
+                line_width = self.draw.textsize(line, font=font)[0]
+            line = line.strip() + ' '
+
+            pos_x = (self.max_width - line_width) / 2
+
+            if shadow_color:
+                self.shadow_draw.text(
+                        (pos_x + self.SHADOW_X, self.height + self.SHADOW_Y),
+                        line, font=font, fill=shadow_color
+                )
+
+            self.draw.text((pos_x, self.height), line, font=font, fill=color)
+            self.height += line_height
+            # go to next line
+            text = text[len(line):]
+
+    def image(self):
+        """Creates the actual Image object."""
+        image = Image.new('RGBA', (self.max_width,
+                                   self.height + self.padding_y))
+        if self.shadow_img:
+            shadow = self.shadow_img.filter(ImageFilter.BLUR)
+            image.paste(shadow, (0, 0), shadow)
+            image.paste(self.img, (0, 0), self.img)
+        else:
+            image.paste(self.img, (0, 0))
+        return image

 
 
 class Cover(object):
 
 
 class Cover(object):

+    """Abstract base class for cover images generator."""

     width = 600
     height = 800
     background_color = '#fff'
     width = 600
     height = 800
     background_color = '#fff'


@@ -31,10 +106,10 @@ class Cover(object):
 
     logo_bottom = None
     logo_width = None
 
     logo_bottom = None
     logo_width = None

+    uses_dc_cover = False

 
     format = 'JPEG'
 
 
     format = 'JPEG'
 

-

     exts = {
         'JPEG': 'jpg',
         'PNG': 'png',
     exts = {
         'JPEG': 'jpg',
         'PNG': 'png',


@@ -45,42 +120,18 @@ class Cover(object):
         'PNG': 'image/png',
         }
 
         'PNG': 'image/png',
         }
 

-
-    @staticmethod
-    def draw_centered_text(text, img, font, margin_left, width, pos_y, lineskip, color, shadow_color):
-        if shadow_color:
-            shadow_img = Image.new('RGBA', img.size)
-            shadow_draw = ImageDraw.Draw(shadow_img)
-        text_img = Image.new('RGBA', img.size)
-        text_draw = ImageDraw.Draw(text_img)
-        while text:
-            line = text
-            while text_draw.textsize(line, font=font)[0] > width:
-                try:
-                    line, ext = line.rsplit(' ', 1)
-                except:
-                    break
-            pos_x = margin_left + (width - text_draw.textsize(line, font=font)[0]) / 2
-            if shadow_color:
-                shadow_draw.text((pos_x + 3, pos_y + 3), line, font=font, fill=shadow_color)
-            text_draw.text((pos_x, pos_y), line, font=font, fill=color)
-            pos_y += lineskip
-            text = text[len(line)+1:]
-        if shadow_color:
-            shadow_img = shadow_img.filter(ImageFilter.BLUR)
-            img.paste(shadow_img, None, shadow_img)
-        img.paste(text_img, None, text_img)
-        return pos_y
-
-
-    def __init__(self, author='', title=''):
-        self.author = author
-        self.title = title
+    def __init__(self, book_info, format=None):
+        self.author = ", ".join(auth.readable() for auth in book_info.authors)
+        self.title = book_info.title
+        if format is not None:
+            self.format = format

 
     def pretty_author(self):
 
     def pretty_author(self):

+        """Allows for decorating author's name."""

         return self.author
 
     def pretty_title(self):
         return self.author
 
     def pretty_title(self):

+        """Allows for decorating title."""

         return self.title
 
     def image(self):
         return self.title
 
     def image(self):


@@ -97,14 +148,29 @@ class Cover(object):
             logo = logo.resize((self.logo_width, logo.size[1] * self.logo_width / logo.size[0]))
             img.paste(logo, ((self.width - self.logo_width) / 2, img.size[1] - logo.size[1] - self.logo_bottom))
 
             logo = logo.resize((self.logo_width, logo.size[1] * self.logo_width / logo.size[0]))
             img.paste(logo, ((self.width - self.logo_width) / 2, img.size[1] - logo.size[1] - self.logo_bottom))
 

-        author_font = self.author_font or ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), 30)
-        title_y = self.draw_centered_text(self.pretty_author(), img, author_font,
-                    self.author_margin_left, self.width - self.author_margin_left - self.author_margin_right, self.author_top,
-                    self.author_lineskip, self.author_color, self.author_shadow) + self.title_top
-        title_font = self.title_font or ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), 40)
-        self.draw_centered_text(self.pretty_title(), img, title_font,
-                    self.title_margin_left, self.width - self.title_margin_left - self.title_margin_right, title_y,
-                    self.title_lineskip, self.title_color, self.title_shadow)
+        top = self.author_top
+        tbox = TextBox(
+            self.width - self.author_margin_left - self.author_margin_right,
+            self.height - top,
+            )
+        author_font = self.author_font or ImageFont.truetype(
+            get_resource('fonts/DejaVuSerif.ttf'), 30)
+        tbox.text(self.pretty_author(), self.author_color, author_font,
+            self.author_lineskip, self.author_shadow)
+        text_img = tbox.image()
+        img.paste(text_img, (self.author_margin_left, top), text_img)
+
+        top += text_img.size[1] + self.title_top
+        tbox = TextBox(
+            self.width - self.title_margin_left - self.title_margin_right,
+            self.height - top,
+            )
+        title_font = self.author_font or ImageFont.truetype(
+            get_resource('fonts/DejaVuSerif.ttf'), 40)
+        tbox.text(self.pretty_title(), self.title_color, title_font,
+            self.title_lineskip, self.title_shadow)
+        text_img = tbox.image()
+        img.paste(text_img, (self.title_margin_left, top), text_img)

 
         return img
 
 
         return img
 


@@ -117,59 +183,12 @@ class Cover(object):
     def save(self, *args, **kwargs):
         return self.image().save(format=self.format, *args, **kwargs)
 
     def save(self, *args, **kwargs):
         return self.image().save(format=self.format, *args, **kwargs)
 

+    def output_file(self, *args, **kwargs):
+        imgstr = StringIO()
+        self.save(imgstr, *args, **kwargs)
+        return IOFile.from_string(imgstr.getvalue())

 
 

-
-class VirtualoCover(Cover):
-    width = 600
-    height = 730
-    author_top = 73
-    title_top = 73
-    logo_bottom = 0
-    logo_width = 300
-
-
-class PrestigioCover(Cover):
-    width = 580
-    height = 783
-    background_img = get_resource('res/cover-prestigio.png')
-
-    author_top = 446
-    author_margin_left = 118
-    author_margin_right = 62
-    author_lineskip = 60
-    author_color = '#fff'
-    author_shadow = '#000'
-    author_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50)
-
-    title_top = 0
-    title_margin_left = 118
-    title_margin_right = 62
-    title_lineskip = 60
-    title_color = '#fff'
-    title_shadow = '#000'
-    title_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50)
-
-    def pretty_title(self):
-        return u"„%s”" % self.title
-
-
-class BookotekaCover(Cover):
-    width = 2140
-    height = 2733
-    background_img = get_resource('res/cover-bookoteka.png')
-
-    author_top = 480
-    author_margin_left = 307
-    author_margin_right = 233
-    author_lineskip = 156
-    author_color = '#d9d919'
-    author_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 130)
-
-    title_top = 400
-    title_margin_left = 307
-    title_margin_right = 233
-    title_lineskip = 168
-    title_color = '#d9d919'
-    title_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 140)
-
-    format = 'PNG'
+    def for_pdf(self):
+        return IOFile.from_filename(get_resource('pdf/cover_image.sty'), {
+            'cover.png': self.output_file(),
+        })