mirror of
https://github.com/kovidgoyal/calibre.git
synced 2025-10-31 10:37:00 -04:00
Re-implemented rendering engine without using Qt's rich text facilities. Much faster this way.
This commit is contained in:
Kovid Goyal
parent
126a8771fe
commit
4da344abf5
@ -14,23 +14,20 @@
|
||||
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
''''''
|
||||
|
||||
import operator, collections, copy, re, sys
|
||||
import collections
|
||||
|
||||
from PyQt4.QtCore import Qt, QByteArray, SIGNAL, QVariant, QUrl
|
||||
from PyQt4.QtCore import Qt, QByteArray, SIGNAL
|
||||
from PyQt4.QtGui import QGraphicsRectItem, QGraphicsScene, QPen, \
|
||||
QBrush, QColor, QGraphicsTextItem, QFontDatabase, \
|
||||
QFont, QGraphicsItem, QGraphicsLineItem, QPixmap, \
|
||||
QGraphicsPixmapItem, QTextCharFormat, QTextFrameFormat, \
|
||||
QTextBlockFormat, QTextCursor, QTextImageFormat, \
|
||||
QTextDocument, QTextOption
|
||||
QBrush, QColor, QFontDatabase, \
|
||||
QGraphicsItem, QGraphicsLineItem
|
||||
|
||||
from libprs500.gui2.lrf_renderer.text import TextBlock, FontLoader, COLOR, PixmapItem
|
||||
|
||||
|
||||
from libprs500.ebooks.lrf.fonts import FONT_MAP
|
||||
from libprs500.gui2 import qstring_to_unicode
|
||||
from libprs500.ebooks.hyphenate import hyphenate_word
|
||||
from libprs500.ebooks.BeautifulSoup import Tag
|
||||
from libprs500.ebooks.lrf.objects import RuledLine as _RuledLine
|
||||
from libprs500.ebooks.lrf.objects import Canvas as __Canvas
|
||||
|
||||
|
||||
class Color(QColor):
|
||||
def __init__(self, color):
|
||||
QColor.__init__(self, color.r, color.g, color.b, 0xff-color.a)
|
||||
@ -40,280 +37,6 @@ class Pen(QPen):
|
||||
QPen.__init__(self, QBrush(Color(color)), width,
|
||||
(Qt.SolidLine if width > 0 else Qt.NoPen))
|
||||
|
||||
WEIGHT_MAP = lambda wt : int((wt/10.)-1)
|
||||
|
||||
class FontLoader(object):
|
||||
|
||||
font_map = {
|
||||
'Swis721 BT Roman' : 'Liberation Sans',
|
||||
'Dutch801 Rm BT Roman' : 'Liberation Serif',
|
||||
'Courier10 BT Roman' : 'Liberation Mono',
|
||||
}
|
||||
|
||||
def __init__(self, font_map, dpi):
|
||||
self.face_map = {}
|
||||
self.cache = {}
|
||||
self.dpi = dpi
|
||||
self.face_map = font_map
|
||||
|
||||
def font(self, text_style):
|
||||
device_font = text_style.fontfacename in FONT_MAP
|
||||
if device_font:
|
||||
face = self.font_map[text_style.fontfacename]
|
||||
else:
|
||||
face = self.face_map[text_style.fontfacename]
|
||||
|
||||
sz = text_style.fontsize
|
||||
wt = text_style.fontweight
|
||||
style = text_style.fontstyle
|
||||
font = (face, wt, style, sz,)
|
||||
if font in self.cache:
|
||||
rfont = self.cache[font]
|
||||
else:
|
||||
italic = font[2] == QFont.StyleItalic
|
||||
rfont = QFont(font[0], font[3], font[1], italic)
|
||||
rfont.setPixelSize(font[3])
|
||||
rfont.setBold(wt>=69)
|
||||
self.cache[font] = rfont
|
||||
qfont = rfont
|
||||
if text_style.emplinetype != 'none':
|
||||
qfont = QFont(rfont)
|
||||
qfont.setOverline(text_style.emplineposition == 'before')
|
||||
qfont.setUnderline(text_style.emplineposition == 'after')
|
||||
return qfont
|
||||
|
||||
class ParSkip(object):
|
||||
def __init__(self, parskip):
|
||||
self.height = parskip
|
||||
|
||||
def __str__(self):
|
||||
return 'Parskip: '+str(self.height)
|
||||
|
||||
class PixmapItem(QGraphicsPixmapItem):
|
||||
def __init__(self, data, encoding, x0, y0, x1, y1, xsize, ysize):
|
||||
p = QPixmap()
|
||||
p.loadFromData(data, encoding, Qt.AutoColor)
|
||||
w, h = p.width(), p.height()
|
||||
p = p.copy(x0, y0, min(w, x1-x0), min(h, y1-y0))
|
||||
if p.width() != xsize or p.height() != ysize:
|
||||
p = p.scaled(xsize, ysize, Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
|
||||
QGraphicsPixmapItem.__init__(self, p)
|
||||
self.height, self.width = ysize, xsize
|
||||
self.setTransformationMode(Qt.SmoothTransformation)
|
||||
self.setShapeMode(QGraphicsPixmapItem.BoundingRectShape)
|
||||
|
||||
|
||||
class Plot(PixmapItem):
|
||||
|
||||
def __init__(self, plot, dpi):
|
||||
img = plot.refobj
|
||||
xsize, ysize = dpi*plot.attrs['xsize']/720., dpi*plot.attrs['xsize']/720.
|
||||
x0, y0, x1, y1 = img.x0, img.y0, img.x1, img.y1
|
||||
data, encoding = img.data, img.encoding
|
||||
PixmapItem.__init__(self, data, encoding, x0, y0, x1, y1, xsize, ysize)
|
||||
|
||||
|
||||
class Line(QGraphicsRectItem):
|
||||
whitespace = re.compile(r'\s+')
|
||||
no_pen = QPen(Qt.NoPen)
|
||||
inactive_brush = QBrush(QColor(0x00, 0x00, 0x00, 0x09))
|
||||
active_brush = QBrush(QColor(0x00, 0x00, 0x00, 0x59))
|
||||
|
||||
line_map = {
|
||||
'none' : QTextCharFormat.NoUnderline,
|
||||
'solid' : QTextCharFormat.SingleUnderline,
|
||||
'dotted' : QTextCharFormat.DotLine,
|
||||
'dashed' : QTextCharFormat.DashUnderline,
|
||||
'double' : QTextCharFormat.WaveUnderline,
|
||||
}
|
||||
dto = QTextOption(Qt.AlignJustify)
|
||||
|
||||
def __init__(self, offset, linespace, linelength, align, hyphenate, ts, block_id):
|
||||
QGraphicsRectItem.__init__(self, 0, 0, 0, 0)
|
||||
self.offset, self.line_space, self.line_length = offset, linespace, linelength
|
||||
self.align = align
|
||||
self.do_hyphenation = hyphenate
|
||||
self.setPen(self.__class__.no_pen)
|
||||
self.is_empty = True
|
||||
self.highlight_rect = None
|
||||
self.cursor = None
|
||||
self.item = None
|
||||
self.plot_counter = 0
|
||||
self.create_text_item(ts)
|
||||
self.block_id = block_id
|
||||
|
||||
def hoverEnterEvent(self, event):
|
||||
if self.highlight_rect is not None:
|
||||
self.highlight_rect.setBrush(self.__class__.active_brush)
|
||||
|
||||
def hoverLeaveEvent(self, event):
|
||||
if self.highlight_rect is not None:
|
||||
self.highlight_rect.setBrush(self.__class__.inactive_brush)
|
||||
|
||||
def mousePressEvent(self, event):
|
||||
if self.highlight_rect is not None:
|
||||
self.hoverLeaveEvent(None)
|
||||
self.link[1](self.link[0])
|
||||
|
||||
def create_link(self, pos, in_link):
|
||||
if not self.acceptsHoverEvents():
|
||||
self.setAcceptsHoverEvents(True)
|
||||
self.highlight_rect = QGraphicsRectItem(pos, 0, 0, 0, self)
|
||||
self.highlight_rect.setCursor(Qt.PointingHandCursor)
|
||||
self.link = in_link
|
||||
self.link_end = sys.maxint
|
||||
|
||||
def end_link(self):
|
||||
self.link_end = self.item.boundingRect().width() - self.highlight_rect.boundingRect().x()
|
||||
|
||||
def add_plot(self, plot, ts, in_link):
|
||||
label='plot%d'%(self.plot_counter,)
|
||||
self.plot_counter += 1
|
||||
pos = self.item.boundingRect().width()
|
||||
self.item.document().addResource(QTextDocument.ImageResource, QUrl(label),
|
||||
QVariant(plot.pixmap()))
|
||||
qif = QTextImageFormat()
|
||||
qif.setHeight(plot.height)
|
||||
qif.setWidth(plot.width)
|
||||
qif.setName(label)
|
||||
self.cursor.insertImage(qif, QTextFrameFormat.InFlow)
|
||||
if in_link:
|
||||
self.create_link(pos, in_link)
|
||||
|
||||
|
||||
def can_add_plot(self, plot):
|
||||
pos = self.item.boundingRect().width() if self.item is not None else 0
|
||||
return self.line_length - pos >= plot.width
|
||||
|
||||
def create_text_item(self, ts):
|
||||
self.item = QGraphicsTextItem(self)
|
||||
doc = self.item.document()
|
||||
doc.setDefaultTextOption(self.__class__.dto)
|
||||
self.cursor = QTextCursor(doc)
|
||||
f = self.cursor.currentFrame()
|
||||
ff = QTextFrameFormat()
|
||||
ff.setBorder(0)
|
||||
ff.setPadding(0)
|
||||
ff.setMargin(0)
|
||||
f.setFrameFormat(ff)
|
||||
bf = QTextBlockFormat()
|
||||
bf.setTopMargin(0)
|
||||
bf.setRightMargin(0)
|
||||
bf.setBottomMargin(0)
|
||||
bf.setRightMargin(0)
|
||||
bf.setNonBreakableLines(True)
|
||||
self.cursor.setBlockFormat(bf)
|
||||
|
||||
|
||||
def build_char_format(self, ts):
|
||||
tcf = QTextCharFormat()
|
||||
tcf.setFont(ts.font)
|
||||
tcf.setVerticalAlignment(ts.valign)
|
||||
tcf.setForeground(ts.textcolor)
|
||||
tcf.setUnderlineColor(ts.linecolor)
|
||||
if ts.emplineposition == 'after':
|
||||
tcf.setUnderlineStyle(self.line_map[ts.emplinetype])
|
||||
return tcf
|
||||
|
||||
def populate(self, phrase, ts, wordspace, in_link):
|
||||
phrase_pos = 0
|
||||
processed = False
|
||||
matches = self.__class__.whitespace.finditer(phrase)
|
||||
tcf = self.build_char_format(ts)
|
||||
if in_link:
|
||||
start = self.item.boundingRect().width()
|
||||
for match in matches:
|
||||
processed = True
|
||||
left, right = match.span()
|
||||
if wordspace == 0:
|
||||
right = left
|
||||
word = phrase[phrase_pos:right]
|
||||
self.cursor.insertText(word, tcf)
|
||||
if self.item.boundingRect().width() > self.line_length:
|
||||
self.cursor.movePosition(QTextCursor.PreviousCharacter, QTextCursor.KeepAnchor,
|
||||
right-left)
|
||||
self.cursor.removeSelectedText()
|
||||
if self.item.boundingRect().width() <= self.line_length:
|
||||
if in_link: self.create_link(start, in_link)
|
||||
return right, True
|
||||
self.cursor.movePosition(QTextCursor.PreviousCharacter, QTextCursor.KeepAnchor,
|
||||
left-phrase_pos)
|
||||
self.cursor.removeSelectedText()
|
||||
if self.do_hyphenation:
|
||||
tokens = hyphenate_word(word)
|
||||
for i in range(len(tokens)-2, -1, -1):
|
||||
part = ''.join(tokens[0:i+1])
|
||||
self.cursor.insertText(part+'-', tcf)
|
||||
if self.item.boundingRect().width() <= self.line_length:
|
||||
if in_link: self.create_link(start, in_link)
|
||||
return phrase_pos + len(part), True
|
||||
self.cursor.movePosition(QTextCursor.PreviousCharacter, QTextCursor.KeepAnchor,
|
||||
len(part)+1)
|
||||
self.cursor.removeSelectedText()
|
||||
if self.cursor.position() < 1: # Force hyphenation as word is longer than line
|
||||
for i in range(len(word)-5, 0, -5):
|
||||
part = word[:i]
|
||||
self.cursor.insertText(part+'-', tcf)
|
||||
if self.item.boundingRect().width() <= self.line_length:
|
||||
if in_link: self.create_link(start, in_link)
|
||||
return phrase_pos + len(part), True
|
||||
self.cursor.movePosition(QTextCursor.PreviousCharacter, QTextCursor.KeepAnchor,
|
||||
len(part)+1)
|
||||
self.cursor.removeSelectedText()
|
||||
return phrase_pos, True
|
||||
|
||||
if in_link: self.create_link(start, in_link)
|
||||
phrase_pos = right
|
||||
|
||||
if not processed:
|
||||
return self.populate(phrase+' ', ts, 0, in_link)
|
||||
|
||||
return phrase_pos, False
|
||||
|
||||
|
||||
|
||||
def finalize(self, wordspace, vdebug):
|
||||
crect = self.childrenBoundingRect()
|
||||
self.width = crect.width() - wordspace
|
||||
self.height = crect.height() + self.line_space
|
||||
self.setRect(crect)
|
||||
|
||||
if vdebug:
|
||||
self.setPen(QPen(Qt.yellow, 1, Qt.DotLine))
|
||||
if self.highlight_rect is not None:
|
||||
x = self.highlight_rect.boundingRect().x()
|
||||
if self.link_end == sys.maxint:
|
||||
self.link_end = crect.width()-x
|
||||
self.highlight_rect.setRect(crect)
|
||||
erect = self.highlight_rect.boundingRect()
|
||||
erect.setX(x)
|
||||
erect.setWidth(self.link_end)
|
||||
self.highlight_rect.setRect(erect)
|
||||
self.highlight_rect.setBrush(self.__class__.inactive_brush)
|
||||
self.highlight_rect.setZValue(-1)
|
||||
self.highlight_rect.setPen(self.__class__.no_pen)
|
||||
|
||||
return self.height
|
||||
|
||||
def getx(self, textwidth):
|
||||
if self.align == 'head':
|
||||
return self.offset
|
||||
if self.align == 'foot':
|
||||
return textwidth - self.width
|
||||
if self.align == 'center':
|
||||
return (textwidth-self.width)/2.
|
||||
|
||||
def __unicode__(self):
|
||||
s = u''
|
||||
for word in self.children():
|
||||
if not hasattr(word, 'toPlainText'):
|
||||
continue
|
||||
s += qstring_to_unicode(word.toPlainText())
|
||||
return s
|
||||
|
||||
def __str__(self):
|
||||
return unicode(self).encode('utf-8')
|
||||
|
||||
|
||||
class ContentObject(object):
|
||||
|
||||
@ -323,226 +46,6 @@ class ContentObject(object):
|
||||
self.has_content = True
|
||||
|
||||
|
||||
NULL = lambda a, b: a
|
||||
COLOR = lambda a, b: QColor(*a)
|
||||
WEIGHT = lambda a, b: WEIGHT_MAP(a)
|
||||
|
||||
class Style(object):
|
||||
map = collections.defaultdict(lambda : NULL)
|
||||
|
||||
def __init__(self, style, dpi):
|
||||
self.fdpi = dpi/720.
|
||||
self.update(style.as_dict())
|
||||
|
||||
def update(self, *args, **kwds):
|
||||
if len(args) > 0:
|
||||
kwds = args[0]
|
||||
for attr in kwds:
|
||||
setattr(self, attr, self.__class__.map[attr](kwds[attr], self.fdpi))
|
||||
|
||||
def copy(self):
|
||||
return copy.copy(self)
|
||||
|
||||
|
||||
class TextStyle(Style):
|
||||
|
||||
map = collections.defaultdict(lambda : NULL,
|
||||
fontsize = operator.mul,
|
||||
fontwidth = operator.mul,
|
||||
fontweight = WEIGHT,
|
||||
textcolor = COLOR,
|
||||
textbgcolor = COLOR,
|
||||
wordspace = operator.mul,
|
||||
letterspace = operator.mul,
|
||||
baselineskip = operator.mul,
|
||||
linespace = operator.mul,
|
||||
parindent = operator.mul,
|
||||
parskip = operator.mul,
|
||||
textlinewidth = operator.mul,
|
||||
charspace = operator.mul,
|
||||
linecolor = COLOR,
|
||||
)
|
||||
|
||||
def __init__(self, style, font_loader, ruby_tags):
|
||||
self.font_loader = font_loader
|
||||
self.fontstyle = QFont.StyleNormal
|
||||
self.valign = QTextCharFormat.AlignBottom
|
||||
for attr in ruby_tags:
|
||||
setattr(self, attr, ruby_tags[attr])
|
||||
Style.__init__(self, style, font_loader.dpi)
|
||||
self.emplinetype = 'none'
|
||||
self.font = self.font_loader.font(self)
|
||||
|
||||
|
||||
def update(self, *args, **kwds):
|
||||
Style.update(self, *args, **kwds)
|
||||
self.font = self.font_loader.font(self)
|
||||
|
||||
|
||||
class BlockStyle(Style):
|
||||
map = collections.defaultdict(lambda : NULL,
|
||||
bgcolor = COLOR,
|
||||
framecolor = COLOR,
|
||||
)
|
||||
|
||||
|
||||
class TextBlock(ContentObject):
|
||||
|
||||
has_content = property(fget=lambda self: self.peek_index < len(self.lines)-1)
|
||||
XML_ENTITIES = dict(zip(Tag.XML_SPECIAL_CHARS_TO_ENTITIES.values(), Tag.XML_SPECIAL_CHARS_TO_ENTITIES.keys()))
|
||||
XML_ENTITIES["quot"] = '"'
|
||||
|
||||
class HeightExceeded(Exception):
|
||||
pass
|
||||
|
||||
|
||||
def __init__(self, tb, font_loader, respect_max_y, text_width, logger,
|
||||
opts, ruby_tags, link_activated,
|
||||
parent=None, x=0, y=0):
|
||||
ContentObject.__init__(self)
|
||||
self.block_id = tb.id
|
||||
self.bs, self.ts = BlockStyle(tb.style, font_loader.dpi), \
|
||||
TextStyle(tb.textstyle, font_loader, ruby_tags)
|
||||
self.bs.update(tb.attrs)
|
||||
self.ts.update(tb.attrs)
|
||||
self.lines = []
|
||||
self.line_length = min(self.bs.blockwidth, text_width)
|
||||
self.line_length -= 2*self.bs.sidemargin
|
||||
self.line_offset = self.bs.sidemargin
|
||||
self.first_line = True
|
||||
self.current_style = self.ts.copy()
|
||||
self.current_line = None
|
||||
self.font_loader, self.logger, self.opts = font_loader, logger, opts
|
||||
self.in_link = False
|
||||
self.link_activated = link_activated
|
||||
self.max_y = self.bs.blockheight if (respect_max_y or self.bs.blockrule.lower() in ('vert-fixed', 'block-fixed')) else sys.maxint
|
||||
self.height = 0
|
||||
try:
|
||||
if self.max_y > 0:
|
||||
self.populate(tb.content)
|
||||
self.end_line()
|
||||
except TextBlock.HeightExceeded:
|
||||
logger.warning('TextBlock height exceeded, truncating.')
|
||||
self.peek_index = -1
|
||||
|
||||
|
||||
|
||||
def peek(self):
|
||||
return self.lines[self.peek_index+1]
|
||||
|
||||
def commit(self):
|
||||
self.peek_index += 1
|
||||
|
||||
def reset(self):
|
||||
self.peek_index = -1
|
||||
|
||||
def end_link(self):
|
||||
self.link_activated(self.in_link[0], on_creation=True)
|
||||
self.in_link = False
|
||||
|
||||
def populate(self, tb):
|
||||
self.create_line()
|
||||
open_containers = collections.deque()
|
||||
self.in_para = False
|
||||
for i in tb.content:
|
||||
if isinstance(i, basestring):
|
||||
self.process_text(i)
|
||||
elif i is None:
|
||||
if len(open_containers) > 0:
|
||||
for a, b in open_containers.pop():
|
||||
if callable(a):
|
||||
a(*b)
|
||||
else:
|
||||
setattr(self, a, b)
|
||||
elif i.name == 'P':
|
||||
open_containers.append((('in_para', False),))
|
||||
self.in_para = True
|
||||
elif i.name == 'CR':
|
||||
if self.in_para:
|
||||
self.end_line()
|
||||
self.create_line()
|
||||
else:
|
||||
self.end_line()
|
||||
delta = self.current_style.parskip
|
||||
if isinstance(self.lines[-1], ParSkip):
|
||||
delta += self.current_style.baselineskip
|
||||
self.lines.append(ParSkip(delta))
|
||||
self.first_line = True
|
||||
elif i.name == 'Span':
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
self.current_style.update(i.attrs)
|
||||
elif i.name == 'CharButton':
|
||||
open_containers.append(((self.end_link, []),))
|
||||
self.in_link = (i.attrs['refobj'], self.link_activated)
|
||||
elif i.name == 'Italic':
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
self.current_style.update(fontstyle=QFont.StyleItalic)
|
||||
elif i.name == 'Plot':
|
||||
plot = Plot(i, self.font_loader.dpi)
|
||||
if self.current_line is None:
|
||||
self.create_line()
|
||||
if not self.current_line.can_add_plot(plot):
|
||||
self.end_line()
|
||||
self.create_line()
|
||||
self.current_line.add_plot(plot, self.current_style, self.in_link)
|
||||
elif i.name == 'Sup':
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
self.current_style.valign=QTextCharFormat.AlignSuperScript
|
||||
elif i.name == 'Sub':
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
self.current_style.valign=QTextCharFormat.AlignSubScript
|
||||
elif i.name == 'EmpLine':
|
||||
if i.attrs:
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
self.current_style.update(i.attrs)
|
||||
else:
|
||||
self.logger.warning('Unhandled TextTag %s'%(i.name,))
|
||||
if not i.self_closing:
|
||||
open_containers.append([])
|
||||
|
||||
def __iter__(self):
|
||||
for line in self.lines: yield line
|
||||
|
||||
def end_line(self):
|
||||
if self.current_line is not None:
|
||||
self.height += self.current_line.finalize(self.current_style.wordspace, self.opts.visual_debug)
|
||||
if self.height > self.max_y+10:
|
||||
raise TextBlock.HeightExceeded
|
||||
self.lines.append(self.current_line)
|
||||
self.current_line = None
|
||||
|
||||
def create_line(self):
|
||||
line_length = self.line_length
|
||||
line_offset = self.line_offset
|
||||
if self.first_line:
|
||||
line_length -= self.current_style.parindent
|
||||
line_offset += self.current_style.parindent
|
||||
self.current_line = Line(line_offset, self.current_style.linespace,
|
||||
line_length, self.current_style.align,
|
||||
self.opts.hyphenate, self.current_style, self.block_id)
|
||||
self.first_line = False
|
||||
|
||||
def process_text(self, raw):
|
||||
for ent, rep in TextBlock.XML_ENTITIES.items():
|
||||
raw = raw.replace(u'&%s;'%ent, rep)
|
||||
while len(raw) > 0:
|
||||
if self.current_line is None:
|
||||
self.create_line()
|
||||
pos, line_filled = self.current_line.populate(raw, self.current_style,
|
||||
self.current_style.wordspace, self.in_link)
|
||||
raw = raw[pos:]
|
||||
if line_filled:
|
||||
self.end_line()
|
||||
|
||||
|
||||
def __unicode__(self):
|
||||
return u'\n'.join(unicode(l) for l in self.lines)
|
||||
|
||||
def __str__(self):
|
||||
|
||||
return '<TextBlock>\n'+unicode(self).encode('utf-8')+'\n</TextBlock>'
|
||||
|
||||
|
||||
class RuledLine(QGraphicsLineItem, ContentObject):
|
||||
|
||||
map = {'solid': Qt.SolidLine, 'dashed': Qt.DashLine, 'dotted': Qt.DotLine, 'double': Qt.DashDotLine}
|
||||
@ -567,9 +70,10 @@ class ImageBlock(PixmapItem, ContentObject):
|
||||
def object_factory(container, obj, respect_max_y=False):
|
||||
if hasattr(obj, 'name'):
|
||||
if obj.name.endswith('TextBlock'):
|
||||
|
||||
return TextBlock(obj, container.font_loader, respect_max_y, container.text_width,
|
||||
container.logger,
|
||||
container.opts, container.ruby_tags, container.link_activated)
|
||||
container.logger, container.opts, container.ruby_tags,
|
||||
container.link_activated)
|
||||
elif obj.name.endswith('ImageBlock'):
|
||||
return ImageBlock(obj)
|
||||
elif isinstance(obj, _RuledLine):
|
||||
@ -623,7 +127,9 @@ class _Canvas(QGraphicsRectItem):
|
||||
if isinstance(line, QGraphicsItem):
|
||||
line.setParentItem(self)
|
||||
line.setPos(x + line.getx(textwidth), y)
|
||||
y += line.height
|
||||
y += line.height
|
||||
else:
|
||||
y += line.height
|
||||
if not block.has_content:
|
||||
y += block.bs.footskip
|
||||
block_consumed = True
|
||||
|
||||
520
src/libprs500/gui2/lrf_renderer/text.py
Normal file
520
src/libprs500/gui2/lrf_renderer/text.py
Normal file
@ -0,0 +1,520 @@
|
||||
## Copyright (C) 2007 Kovid Goyal kovid@kovidgoyal.net
|
||||
## This program is free software; you can redistribute it and/or modify
|
||||
## it under the terms of the GNU General Public License as published by
|
||||
## the Free Software Foundation; either version 2 of the License, or
|
||||
## (at your option) any later version.
|
||||
##
|
||||
## This program is distributed in the hope that it will be useful,
|
||||
## but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
## GNU General Public License for more details.
|
||||
##
|
||||
## You should have received a copy of the GNU General Public License along
|
||||
## with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
from libprs500.gui2 import qstring_to_unicode
|
||||
''''''
|
||||
|
||||
import sys, collections, operator, copy, re
|
||||
|
||||
from PyQt4.QtCore import Qt, QRectF, QString
|
||||
from PyQt4.QtGui import QFont, QColor, QPixmap, QGraphicsPixmapItem, \
|
||||
QGraphicsItem, QFontMetrics, QPen, QBrush, QGraphicsRectItem
|
||||
|
||||
from libprs500.ebooks.lrf.fonts import FONT_MAP
|
||||
from libprs500.ebooks.BeautifulSoup import Tag
|
||||
from libprs500.ebooks.hyphenate import hyphenate_word
|
||||
|
||||
WEIGHT_MAP = lambda wt : int((wt/10.)-1)
|
||||
NULL = lambda a, b: a
|
||||
COLOR = lambda a, b: QColor(*a)
|
||||
WEIGHT = lambda a, b: WEIGHT_MAP(a)
|
||||
|
||||
class PixmapItem(QGraphicsPixmapItem):
|
||||
def __init__(self, data, encoding, x0, y0, x1, y1, xsize, ysize):
|
||||
p = QPixmap()
|
||||
p.loadFromData(data, encoding, Qt.AutoColor)
|
||||
w, h = p.width(), p.height()
|
||||
p = p.copy(x0, y0, min(w, x1-x0), min(h, y1-y0))
|
||||
if p.width() != xsize or p.height() != ysize:
|
||||
p = p.scaled(xsize, ysize, Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
|
||||
QGraphicsPixmapItem.__init__(self, p)
|
||||
self.height, self.width = ysize, xsize
|
||||
self.setTransformationMode(Qt.SmoothTransformation)
|
||||
self.setShapeMode(QGraphicsPixmapItem.BoundingRectShape)
|
||||
|
||||
|
||||
class Plot(PixmapItem):
|
||||
|
||||
def __init__(self, plot, dpi):
|
||||
img = plot.refobj
|
||||
xsize, ysize = dpi*plot.attrs['xsize']/720., dpi*plot.attrs['xsize']/720.
|
||||
x0, y0, x1, y1 = img.x0, img.y0, img.x1, img.y1
|
||||
data, encoding = img.data, img.encoding
|
||||
PixmapItem.__init__(self, data, encoding, x0, y0, x1, y1, xsize, ysize)
|
||||
|
||||
|
||||
class FontLoader(object):
|
||||
|
||||
font_map = {
|
||||
'Swis721 BT Roman' : 'Liberation Sans',
|
||||
'Dutch801 Rm BT Roman' : 'Liberation Serif',
|
||||
'Courier10 BT Roman' : 'Liberation Mono',
|
||||
}
|
||||
|
||||
def __init__(self, font_map, dpi):
|
||||
self.face_map = {}
|
||||
self.cache = {}
|
||||
self.dpi = dpi
|
||||
self.face_map = font_map
|
||||
|
||||
def font(self, text_style):
|
||||
device_font = text_style.fontfacename in FONT_MAP
|
||||
if device_font:
|
||||
face = self.font_map[text_style.fontfacename]
|
||||
else:
|
||||
face = self.face_map[text_style.fontfacename]
|
||||
|
||||
sz = text_style.fontsize
|
||||
wt = text_style.fontweight
|
||||
style = text_style.fontstyle
|
||||
font = (face, wt, style, sz,)
|
||||
if font in self.cache:
|
||||
rfont = self.cache[font]
|
||||
else:
|
||||
italic = font[2] == QFont.StyleItalic
|
||||
rfont = QFont(font[0], font[3], font[1], italic)
|
||||
rfont.setPixelSize(font[3])
|
||||
rfont.setBold(wt>=69)
|
||||
self.cache[font] = rfont
|
||||
qfont = rfont
|
||||
if text_style.emplinetype != 'none':
|
||||
qfont = QFont(rfont)
|
||||
qfont.setOverline(text_style.emplineposition == 'before')
|
||||
qfont.setUnderline(text_style.emplineposition == 'after')
|
||||
return qfont
|
||||
|
||||
class Style(object):
|
||||
map = collections.defaultdict(lambda : NULL)
|
||||
|
||||
def __init__(self, style, dpi):
|
||||
self.fdpi = dpi/720.
|
||||
self.update(style.as_dict())
|
||||
|
||||
def update(self, *args, **kwds):
|
||||
if len(args) > 0:
|
||||
kwds = args[0]
|
||||
for attr in kwds:
|
||||
setattr(self, attr, self.__class__.map[attr](kwds[attr], self.fdpi))
|
||||
|
||||
def copy(self):
|
||||
return copy.copy(self)
|
||||
|
||||
|
||||
class TextStyle(Style):
|
||||
|
||||
map = collections.defaultdict(lambda : NULL,
|
||||
fontsize = operator.mul,
|
||||
fontwidth = operator.mul,
|
||||
fontweight = WEIGHT,
|
||||
textcolor = COLOR,
|
||||
textbgcolor = COLOR,
|
||||
wordspace = operator.mul,
|
||||
letterspace = operator.mul,
|
||||
baselineskip = operator.mul,
|
||||
linespace = operator.mul,
|
||||
parindent = operator.mul,
|
||||
parskip = operator.mul,
|
||||
textlinewidth = operator.mul,
|
||||
charspace = operator.mul,
|
||||
linecolor = COLOR,
|
||||
)
|
||||
|
||||
def __init__(self, style, font_loader, ruby_tags):
|
||||
self.font_loader = font_loader
|
||||
self.fontstyle = QFont.StyleNormal
|
||||
for attr in ruby_tags:
|
||||
setattr(self, attr, ruby_tags[attr])
|
||||
Style.__init__(self, style, font_loader.dpi)
|
||||
self.emplinetype = 'none'
|
||||
self.font = self.font_loader.font(self)
|
||||
|
||||
|
||||
def update(self, *args, **kwds):
|
||||
Style.update(self, *args, **kwds)
|
||||
self.font = self.font_loader.font(self)
|
||||
|
||||
|
||||
class BlockStyle(Style):
|
||||
map = collections.defaultdict(lambda : NULL,
|
||||
bgcolor = COLOR,
|
||||
framecolor = COLOR,
|
||||
)
|
||||
|
||||
class ParSkip(object):
|
||||
def __init__(self, parskip):
|
||||
self.height = parskip
|
||||
|
||||
def __str__(self):
|
||||
return 'Parskip: '+str(self.height)
|
||||
|
||||
|
||||
class TextBlock(object):
|
||||
|
||||
class HeightExceeded(Exception):
|
||||
pass
|
||||
|
||||
has_content = property(fget=lambda self: self.peek_index < len(self.lines)-1)
|
||||
XML_ENTITIES = dict(zip(Tag.XML_SPECIAL_CHARS_TO_ENTITIES.values(), Tag.XML_SPECIAL_CHARS_TO_ENTITIES.keys()))
|
||||
XML_ENTITIES["quot"] = '"'
|
||||
|
||||
def __init__(self, tb, font_loader, respect_max_y, text_width, logger,
|
||||
opts, ruby_tags, link_activated):
|
||||
self.block_id = tb.id
|
||||
self.bs, self.ts = BlockStyle(tb.style, font_loader.dpi), \
|
||||
TextStyle(tb.textstyle, font_loader, ruby_tags)
|
||||
self.bs.update(tb.attrs)
|
||||
self.ts.update(tb.attrs)
|
||||
self.lines = collections.deque()
|
||||
self.line_length = min(self.bs.blockwidth, text_width)
|
||||
self.line_length -= 2*self.bs.sidemargin
|
||||
self.line_offset = self.bs.sidemargin
|
||||
self.first_line = True
|
||||
self.current_style = self.ts.copy()
|
||||
self.current_line = None
|
||||
self.font_loader, self.logger, self.opts = font_loader, logger, opts
|
||||
self.in_link = False
|
||||
self.link_activated = link_activated
|
||||
self.max_y = self.bs.blockheight if (respect_max_y or self.bs.blockrule.lower() in ('vert-fixed', 'block-fixed')) else sys.maxint
|
||||
self.height = 0
|
||||
self.peek_index = -1
|
||||
|
||||
try:
|
||||
self.populate(tb.content)
|
||||
self.end_line()
|
||||
except TextBlock.HeightExceeded, err:
|
||||
logger.warning('TextBlock height exceeded, skipping line:\n%s'%(err,))
|
||||
|
||||
def peek(self):
|
||||
return self.lines[self.peek_index+1]
|
||||
|
||||
def commit(self):
|
||||
self.peek_index += 1
|
||||
|
||||
def reset(self):
|
||||
self.peek_index = -1
|
||||
|
||||
def create_link(self, refobj):
|
||||
if self.current_line is None:
|
||||
self.create_line()
|
||||
self.current_line.start_link(refobj, self.link_activated)
|
||||
self.link_activated(refobj, on_creation=True)
|
||||
|
||||
def end_link(self):
|
||||
if self.current_line is not None:
|
||||
self.current_line.end_link()
|
||||
|
||||
|
||||
def populate(self, tb):
|
||||
self.create_line()
|
||||
open_containers = collections.deque()
|
||||
self.in_para = False
|
||||
for i in tb.content:
|
||||
if isinstance(i, basestring):
|
||||
self.process_text(i)
|
||||
elif i is None:
|
||||
if len(open_containers) > 0:
|
||||
for a, b in open_containers.pop():
|
||||
if callable(a):
|
||||
a(*b)
|
||||
else:
|
||||
setattr(self, a, b)
|
||||
elif i.name == 'P':
|
||||
open_containers.append((('in_para', False),))
|
||||
self.in_para = True
|
||||
elif i.name == 'CR':
|
||||
if self.in_para:
|
||||
self.end_line()
|
||||
self.create_line()
|
||||
else:
|
||||
self.end_line()
|
||||
delta = self.current_style.parskip
|
||||
if isinstance(self.lines[-1], ParSkip):
|
||||
delta += self.current_style.baselineskip
|
||||
self.lines.append(ParSkip(delta))
|
||||
self.first_line = True
|
||||
elif i.name == 'Span':
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
self.current_style.update(i.attrs)
|
||||
elif i.name == 'CharButton':
|
||||
open_containers.append(((self.end_link, []),))
|
||||
self.create_link(i.attrs['refobj'])
|
||||
elif i.name == 'Italic':
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
self.current_style.update(fontstyle=QFont.StyleItalic)
|
||||
elif i.name == 'Plot':
|
||||
plot = Plot(i, self.font_loader.dpi)
|
||||
if self.current_line is None:
|
||||
self.create_line()
|
||||
if not self.current_line.can_add_plot(plot):
|
||||
self.end_line()
|
||||
self.create_line()
|
||||
self.current_line.add_plot(plot)
|
||||
elif i.name == 'Sup':
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
elif i.name == 'Sub':
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
elif i.name == 'EmpLine':
|
||||
if i.attrs:
|
||||
open_containers.append((('current_style', self.current_style.copy()),))
|
||||
self.current_style.update(i.attrs)
|
||||
else:
|
||||
self.logger.warning('Unhandled TextTag %s'%(i.name,))
|
||||
if not i.self_closing:
|
||||
open_containers.append([])
|
||||
|
||||
def end_line(self):
|
||||
if self.current_line is not None:
|
||||
self.height += self.current_line.finalize(self.current_style.baselineskip,
|
||||
self.current_style.linespace,
|
||||
self.opts.visual_debug)
|
||||
if self.height > self.max_y+10:
|
||||
raise TextBlock.HeightExceeded(str(self.current_line))
|
||||
self.lines.append(self.current_line)
|
||||
self.current_line = None
|
||||
|
||||
def create_line(self):
|
||||
line_length = self.line_length
|
||||
line_offset = self.line_offset
|
||||
if self.first_line:
|
||||
line_length -= self.current_style.parindent
|
||||
line_offset += self.current_style.parindent
|
||||
self.current_line = Line(line_length, line_offset,
|
||||
self.current_style.linespace,
|
||||
self.current_style.align,
|
||||
self.opts.hyphenate, self.block_id)
|
||||
self.first_line = False
|
||||
|
||||
def process_text(self, raw):
|
||||
for ent, rep in TextBlock.XML_ENTITIES.items():
|
||||
raw = raw.replace(u'&%s;'%ent, rep)
|
||||
while len(raw) > 0:
|
||||
if self.current_line is None:
|
||||
self.create_line()
|
||||
pos, line_filled = self.current_line.populate(raw, self.current_style)
|
||||
raw = raw[pos:]
|
||||
if line_filled:
|
||||
self.end_line()
|
||||
|
||||
|
||||
def __iter__(self):
|
||||
for line in self.lines: yield line
|
||||
|
||||
def __str__(self):
|
||||
s = ''
|
||||
for line in self:
|
||||
s += str(line) + '\n'
|
||||
return s
|
||||
|
||||
class Link(QGraphicsRectItem):
|
||||
inactive_brush = QBrush(QColor(0x00, 0x00, 0x00, 0x09))
|
||||
active_brush = QBrush(QColor(0x00, 0x00, 0x00, 0x59))
|
||||
|
||||
def __init__(self, parent, start, stop, refobj, slot):
|
||||
QGraphicsRectItem.__init__(self, start, 0, stop-start, parent.height, parent)
|
||||
self.refobj = refobj
|
||||
self.slot = slot
|
||||
self.setBrush(self.__class__.inactive_brush)
|
||||
self.setPen(QPen(Qt.NoPen))
|
||||
self.setCursor(Qt.PointingHandCursor)
|
||||
self.setAcceptsHoverEvents(True)
|
||||
|
||||
def hoverEnterEvent(self, event):
|
||||
self.setBrush(self.__class__.active_brush)
|
||||
|
||||
def hoverLeaveEvent(self, event):
|
||||
self.setBrush(self.__class__.inactive_brush)
|
||||
|
||||
def mousePressEvent(self, event):
|
||||
self.hoverLeaveEvent(None)
|
||||
self.slot(self.refobj)
|
||||
|
||||
class Line(QGraphicsItem):
|
||||
whitespace = re.compile(r'\s+')
|
||||
|
||||
def __init__(self, line_length, offset, linespace, align, hyphenate, block_id):
|
||||
QGraphicsItem.__init__(self)
|
||||
|
||||
self.line_length, self.offset, self.line_space = line_length, offset, linespace
|
||||
self.align, self.hyphenate, self.block_id = align, hyphenate, block_id
|
||||
|
||||
self.tokens = collections.deque()
|
||||
self.current_width = 0
|
||||
self.length_in_space = 0
|
||||
self.height, self.descent = 0, 0
|
||||
self.links = collections.deque()
|
||||
self.current_link = None
|
||||
|
||||
def start_link(self, refobj, slot):
|
||||
self.current_link = [self.current_width, sys.maxint, refobj, slot]
|
||||
|
||||
def end_link(self):
|
||||
if self.current_link is not None:
|
||||
self.current_link[1] = self.current_width
|
||||
self.links.append(self.current_link)
|
||||
self.current_link = None
|
||||
|
||||
def can_add_plot(self, plot):
|
||||
return self.line_length - self.current_width >= plot.width
|
||||
|
||||
def add_plot(self, plot):
|
||||
self.tokens.append(plot)
|
||||
self.current_width += plot.width
|
||||
self.height = max(self.height, plot.height)
|
||||
|
||||
def populate(self, phrase, ts, process_space=True):
|
||||
phrase_pos = 0
|
||||
processed = False
|
||||
matches = self.__class__.whitespace.finditer(phrase)
|
||||
font = QFont(ts.font)
|
||||
fm = QFontMetrics(font)
|
||||
single_space_width = fm.width(' ')
|
||||
height, descent = fm.height(), fm.descent()
|
||||
for match in matches:
|
||||
processed = True
|
||||
left, right = match.span()
|
||||
if not process_space:
|
||||
right = left
|
||||
space_width = single_space_width * (right-left)
|
||||
word = phrase[phrase_pos:left]
|
||||
width = fm.width(word)
|
||||
if self.current_width + width < self.line_length:
|
||||
self.commit(word, width, height, descent, ts, font)
|
||||
if space_width > 0 and self.current_width + space_width < self.line_length:
|
||||
self.add_space(space_width)
|
||||
phrase_pos = right
|
||||
continue
|
||||
|
||||
# Word doesn't fit on line
|
||||
if self.hyphenate and len(word) > 3:
|
||||
tokens = hyphenate_word(word)
|
||||
for i in range(len(tokens)-2, -1, -1):
|
||||
word = ''.join(tokens[0:i+1])+'-'
|
||||
width = fm.width(word)
|
||||
if self.current_width + width < self.line_length:
|
||||
self.commit(word, width, height, descent, ts, font)
|
||||
return phrase_pos + len(word)-1, True
|
||||
if self.current_width < 5: # Force hyphenation as word is longer than line
|
||||
for i in range(len(word)-5, 0, -5):
|
||||
part = word[:i] + '-'
|
||||
width = fm.width(part)
|
||||
if self.current_width + width < self.line_length:
|
||||
self.commit(part, width, height, descent, ts, font)
|
||||
return phrase_pos + len(part)-1, True
|
||||
# Failed to add word.
|
||||
return phrase_pos, True
|
||||
|
||||
if not processed:
|
||||
return self.populate(phrase+' ', ts, False)
|
||||
|
||||
return phrase_pos, False
|
||||
|
||||
def commit(self, word, width, height, descent, ts, font):
|
||||
self.tokens.append(Word(word, width, height, ts, font))
|
||||
self.current_width += width
|
||||
self.height = max(self.height, height)
|
||||
self.descent = max(self.descent, descent)
|
||||
|
||||
def add_space(self, min_width):
|
||||
self.tokens.append(min_width)
|
||||
self.current_width += min_width
|
||||
self.length_in_space += min_width
|
||||
|
||||
def justify(self):
|
||||
delta = self.line_length - self.current_width
|
||||
if self.length_in_space > 0:
|
||||
frac = 1 + float(delta)/self.length_in_space
|
||||
for i in range(len(self.tokens)):
|
||||
if isinstance(self.tokens[i], (int, float)):
|
||||
self.tokens[i] *= frac
|
||||
self.current_width = self.line_length
|
||||
|
||||
def finalize(self, baselineskip, linespace, vdebug):
|
||||
if self.current_width >= 0.85 * self.line_length:
|
||||
self.justify()
|
||||
|
||||
self.width = float(self.current_width)
|
||||
if self.height == 0:
|
||||
self.height = baselineskip
|
||||
self.height += linespace
|
||||
self.height = float(self.height)
|
||||
|
||||
self.vdebug = vdebug
|
||||
|
||||
if self.current_link is not None:
|
||||
self.end_link()
|
||||
for link in self.links:
|
||||
Link(self, *link)
|
||||
|
||||
|
||||
return self.height
|
||||
|
||||
def boundingRect(self):
|
||||
return QRectF(0, 0, self.width, self.height)
|
||||
|
||||
def paint(self, painter, option, widget):
|
||||
x, y = 0, 0+self.height-self.descent
|
||||
if self.vdebug:
|
||||
painter.save()
|
||||
painter.setPen(QPen(Qt.yellow, 1, Qt.DotLine))
|
||||
painter.drawRect(self.boundingRect())
|
||||
painter.restore()
|
||||
painter.save()
|
||||
for tok in self.tokens:
|
||||
if isinstance(tok, (int, float)):
|
||||
x += tok
|
||||
elif isinstance(tok, Word):
|
||||
painter.setFont(tok.font)
|
||||
p = painter.pen()
|
||||
painter.setPen(QPen(tok.text_color))
|
||||
painter.drawText(x, y, tok.string)
|
||||
painter.setPen(p)
|
||||
x += tok.width
|
||||
else:
|
||||
painter.drawPixmap(x, 0, tok.pixmap())
|
||||
x += tok.width
|
||||
painter.restore()
|
||||
|
||||
def getx(self, textwidth):
|
||||
if self.align == 'head':
|
||||
return self.offset
|
||||
if self.align == 'foot':
|
||||
return textwidth - self.width
|
||||
if self.align == 'center':
|
||||
return (textwidth-self.width)/2.
|
||||
|
||||
def __unicode__(self):
|
||||
s = u''
|
||||
for tok in self.tokens:
|
||||
if isinstance(tok, (int, float)):
|
||||
s += ' :%.1f: '%(tok,)
|
||||
elif isinstance(tok, Word):
|
||||
s += qstring_to_unicode(tok.string)
|
||||
return s
|
||||
|
||||
def __str__(self):
|
||||
return unicode(self).encode('utf-8')
|
||||
|
||||
|
||||
class Word(object):
|
||||
|
||||
def __init__(self, string, width, height, ts, font):
|
||||
self.string, self.width, self.height = QString(string), width, height
|
||||
self.font = font
|
||||
self.text_color = ts.textcolor
|
||||
|
||||
def main(args=sys.argv):
|
||||
return 0
|
||||
|
||||
if __name__ == '__main__':
|
||||
sys.exit(main())
|
||||
Loading…
x
Reference in New Issue
Block a user