X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/387bff61a13e750e1ef4e015025415a8b311b25b..0c03134ab73b90e9350769a7c73a78e358f22247:/librarian/cover.py?ds=inline

diff --git a/librarian/cover.py b/librarian/cover.py
index 8aa9abe..e7a8e1b 100644
--- a/librarian/cover.py
+++ b/librarian/cover.py
@@ -7,74 +7,439 @@ import Image, ImageFont, ImageDraw, ImageFilter
 from librarian import get_resource
 
 
-def cover(author, title,
-          width, height, background_color, background_img,
-          author_top, author_margin_left, author_margin_right, author_lineskip, author_color, author_font, author_shadow,
-          title_top, title_margin_left, title_margin_right, title_lineskip, title_color, title_font, title_shadow,
-          logo_width, logo_bottom
-          ):
-    def draw_centered_text(text, img, font, margin_left, width, pos_y, lineskip, color, shadow_color):
+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, shortener=None):
+        """Writes some centered text."""
         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)
+            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
-            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 shortener:
+                for line in shortener(text):
+                    if text_draw.textsize(line, font=font)[0] <= self.max_text_width:
+                        break
+                text = ''
+            else:
+                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:
-                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
-
-
-    img = Image.new('RGB', (width, height), background_color)
-
-    if background_img:
-        background = Image.open(background_img)
-        img.paste(background, None, background)
-        del background
-
-    # WL logo
-    if logo_width:
-        logo = Image.open(get_resource('res/wl-logo.png'))
-        logo = logo.resize((logo_width, logo.size[1] * logo_width / logo.size[0]))
-        img.paste(logo, ((width - logo_width) / 2, img.size[1] - logo.size[1] - logo_bottom))
-
-    title_y = draw_centered_text(author, img, author_font,
-                    author_margin_left, width - author_margin_left - author_margin_right, author_top,
-                    author_lineskip, author_color, author_shadow) + title_top
-    draw_centered_text(title, img, title_font,
-                    title_margin_left, width - title_margin_left - title_margin_right, title_y,
-                    title_lineskip, title_color, title_shadow)
-
-    return img
-
-
-def virtualo_cover(author, title):
-    return cover(author, title,
-          600, 730, '#fff', None,
-          73, 20, 20, 40, '#000', ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), 30), None,
-          73, 20, 20, 54, '#000', ImageFont.truetype(get_resource('fonts/DejaVuSerif.ttf'), 40), None,
-          300, 0
-          )
-
-def prestigio_cover(author, title):
-    return cover(author, u"„%s”" % title,
-          580, 783, '#fff', get_resource('res/cover-prestigio.png'),
-          446, 118, 62, 60, '#fff', ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50), '#000',
-          0, 118, 62, 60, '#fff', ImageFont.truetype(get_resource('fonts/JunicodeWL-Italic.ttf'), 50), '#000',
-          None, None
-          )
+                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):]
+
+    @staticmethod
+    def person_shortener(text):
+        yield text
+        chunks = text.split()
+        n_chunks = len(chunks)
+        # make initials from given names, starting from last
+        for i in range(n_chunks - 2, -1, -1):
+            chunks[i] = chunks[i][0] + '.'
+            yield " ".join(chunks)
+        # remove given names initials, starting from last
+        while len(chunks) > 2:
+            del chunks[1]
+            yield " ".join(chunks)
+
+    @staticmethod
+    def title_shortener(text):
+        yield text
+        chunks = text.split()
+        n_chunks = len(chunks)
+        # remove words, starting from last one
+        while len(chunks) > 1:
+            del chunks[-1]
+            yield " ".join(chunks) + u'…'
+
+    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):
+    """Abstract base class for cover images generator."""
+    width = 600
+    height = 800
+    background_color = '#fff'
+    background_img = None
+
+    author_align = 'c'
+    author_top = 100
+    author_margin_left = 20
+    author_margin_right = 20
+    author_lineskip = 40
+    author_color = '#000'
+    author_shadow = None
+    author_font = None
+    author_wrap = True
+
+    title_align = 'c'
+    title_top = 100
+    title_margin_left = 20
+    title_margin_right = 20
+    title_lineskip = 54
+    title_color = '#000'
+    title_shadow = None
+    title_font = None
+    title_wrap = True
+
+    logo_bottom = None
+    logo_width = None
+    uses_dc_cover = False
+
+    format = 'JPEG'
+
+    exts = {
+        'JPEG': 'jpg',
+        'PNG': 'png',
+        }
+
+    mime_types = {
+        'JPEG': 'image/jpeg',
+        'PNG': 'image/png',
+        }
+
+    def __init__(self, book_info):
+        self.author = ", ".join(auth.readable() for auth in book_info.authors)
+        self.title = book_info.title
+
+    def pretty_author(self):
+        """Allows for decorating author's name."""
+        return self.author
+
+    def pretty_title(self):
+        """Allows for decorating title."""
+        return self.title
+
+    def image(self):
+        img = Image.new('RGB', (self.width, self.height), self.background_color)
+
+        if self.background_img:
+            background = Image.open(self.background_img)
+            try:
+                img.paste(background, None, background)
+            except ValueError, e:
+                img.paste(background)
+            del background
+
+        # WL logo
+        if self.logo_width:
+            logo = Image.open(get_resource('res/wl-logo.png'))
+            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))
+
+        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)
+        author_shortener = None if self.author_wrap else TextBox.person_shortener 
+        tbox.text(self.pretty_author(), self.author_color, author_font,
+            self.author_lineskip, self.author_shadow, author_shortener)
+        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)
+        title_shortener = None if self.title_wrap else TextBox.title_shortener 
+        tbox.text(self.pretty_title(), self.title_color, title_font,
+            self.title_lineskip, self.title_shadow, title_shortener)
+        text_img = tbox.image()
+        img.paste(text_img, (self.title_margin_left, top), text_img)
+
+        return img
+
+    def mime_type(self):
+        return self.mime_types[self.format]
+
+    def ext(self):
+        return self.exts[self.format]
+
+    def save(self, *args, **kwargs):
+        return self.image().save(format=self.format, *args, **kwargs)
+
+
+class WLCover(Cover):
+    """Default Wolne Lektury cover generator."""
+    uses_dc_cover = True
+    author_font = ImageFont.truetype(
+        get_resource('fonts/JunicodeWL-Regular.ttf'), 20)
+    author_lineskip = 30
+    title_font = ImageFont.truetype(
+        get_resource('fonts/DejaVuSerif-Bold.ttf'), 30)
+    title_lineskip = 40
+    title_box_width = 350
+    bar_width = 35
+    background_color = '#444'
+    author_color = '#444'
+
+    epochs = {
+        u'Starożytność': 0,
+        u'Średniowiecze': 30,
+        u'Renesans': 60,
+        u'Barok': 90,
+        u'Oświecenie': 120,
+        u'Romantyzm': 150,
+        u'Pozytywizm': 180,
+        u'Modernizm': 210,
+        u'Dwudziestolecie międzywojenne': 240,
+        u'Współczesność': 270,
+    }
+
+    def __init__(self, book_info):
+        super(WLCover, self).__init__(book_info)
+        self.kind = book_info.kind
+        self.epoch = book_info.epoch
+        if book_info.cover_url:
+            from urllib2 import urlopen
+            from StringIO import StringIO
+
+            bg_src = urlopen(book_info.cover_url)
+            self.background_img = StringIO(bg_src.read())
+            bg_src.close()
+
+    def pretty_author(self):
+        return self.author.upper()
+
+    def image(self):
+        from colorsys import hsv_to_rgb
+
+        img = Image.new('RGB', (self.width, self.height), self.background_color)
+        draw = ImageDraw.Draw(img)
+
+        if self.epoch in self.epochs:
+            epoch_color = tuple(int(255 * c) for c in hsv_to_rgb(
+                    float(self.epochs[self.epoch]) / 360, .7, .7))
+        else:
+            epoch_color = '#000'
+        draw.rectangle((0, 0, self.bar_width, self.height), fill=epoch_color)
+
+        if self.background_img:
+            src = Image.open(self.background_img)
+            trg_size = (self.width - self.bar_width, self.height)
+            if src.size[0] * trg_size[1] < src.size[1] * trg_size[0]:
+                resized = (
+                    trg_size[0],
+                    src.size[1] * trg_size[0] / src.size[0]
+                )
+                cut = (resized[1] - trg_size[1]) / 2
+                src = src.resize(resized)
+                src = src.crop((0, cut, src.size[0], src.size[1] - cut))
+            else:
+                resized = (
+                    src.size[0] * trg_size[1] / src.size[1],
+                    trg_size[1],
+                )
+                cut = (resized[0] - trg_size[0]) / 2
+                src = src.resize(resized)
+                src = src.crop((cut, 0, src.size[0] - cut, src.size[1]))
+            
+            img.paste(src, (self.bar_width, 0))
+            del src
+
+        box = TextBox(self.title_box_width, self.height, padding_y=20)
+        box.text(self.pretty_author(), 
+                 font=self.author_font,
+                 line_height=self.author_lineskip,
+                 color=self.author_color,
+                 shadow_color=self.author_shadow,
+                )
+
+        box.skip(10)
+        box.draw.line((75, box.height, 275, box.height), 
+                fill=self.author_color, width=2)
+        box.skip(15)
+
+        box.text(self.pretty_title(),
+                 line_height=self.title_lineskip,
+                 font=self.title_font,
+                 color=epoch_color,
+                 shadow_color=self.title_shadow,
+                )
+        box_img = box.image()
+
+        if self.kind == 'Liryka':
+            # top
+            box_top = 100
+        elif self.kind == 'Epika':
+            # bottom
+            box_top = self.height - 100 - box_img.size[1]
+        else:
+            # center
+            box_top = (self.height - box_img.size[1]) / 2
+
+        box_left = self.bar_width + (self.width - self.bar_width - 
+                        box_img.size[0]) / 2
+        draw.rectangle((box_left, box_top, 
+            box_left + box_img.size[0], box_top + box_img.size[1]),
+            fill='#fff')
+        img.paste(box_img, (box_left, box_top), box_img)
+
+        return img
+
+
+
+class VirtualoCover(Cover):
+    width = 600
+    height = 730
+    author_top = 73
+    title_top = 73
+    logo_bottom = 25
+    logo_width = 250
+
+
+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'
+
+
+class GandalfCover(Cover):
+    width = 600
+    height = 730
+    background_img = get_resource('res/cover-gandalf.png')
+    author_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 30)
+    title_font = ImageFont.truetype(get_resource('fonts/JunicodeWL-Regular.ttf'), 40)
+    logo_bottom = 25
+    logo_width = 250
+    format = 'PNG'
+
+
+class ArtaTechCover(Cover):
+    width = 600
+    height = 800
+    background_img = get_resource('res/cover-arta-tech.jpg')
+    author_top = 132
+    author_margin_left = 235
+    author_margin_right = 23
+    author_align = 'r'
+    author_font = ImageFont.truetype(get_resource('fonts/DroidSans.ttf'), 32)
+    author_color = '#555555'
+    author_wrap = False
+    title_top = 17
+    title_margin_right = 21
+    title_margin_left = 60
+    title_align = 'r'
+    title_font = ImageFont.truetype(get_resource('fonts/EBGaramond-Regular.ttf'), 42)
+    title_color = '#222222'
+    title_wrap = False
+    format = 'JPEG'
+
+    def pretty_author(self):
+        return self.author.upper()
+
+
+def ImageCover(img):
+    """ a class factory for simple image covers """
+    img = Image.open(img)
+
+    class ImgCover(Cover):
+        def image(self):
+            return img
+
+        @property
+        def format(self):
+            return self.image().format
 
+    return ImgCover