1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
|
__license__ = 'GPL v3'
__copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
import collections, itertools, glob
from PyQt4.QtCore import Qt, QByteArray, pyqtSignal
from PyQt4.QtGui import QGraphicsRectItem, QGraphicsScene, QPen, \
QBrush, QColor, QFontDatabase, \
QGraphicsItem, QGraphicsLineItem
from calibre.gui2.lrf_renderer.text import TextBlock, FontLoader, COLOR, PixmapItem
from calibre.ebooks.lrf.objects import RuledLine as _RuledLine
from calibre.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)
class Pen(QPen):
def __init__(self, color, width):
QPen.__init__(self, QBrush(Color(color)), width,
(Qt.SolidLine if width > 0 else Qt.NoPen))
class ContentObject(object):
has_content = True
def reset(self):
self.has_content = True
class RuledLine(QGraphicsLineItem, ContentObject):
map = {'solid': Qt.SolidLine, 'dashed': Qt.DashLine, 'dotted': Qt.DotLine, 'double': Qt.DashDotLine}
def __init__(self, rl):
QGraphicsLineItem.__init__(self, 0, 0, rl.linelength, 0)
ContentObject.__init__(self)
self.setPen(QPen(COLOR(rl.linecolor, None), rl.linewidth, ))
class ImageBlock(PixmapItem, ContentObject):
def __init__(self, obj):
ContentObject.__init__(self)
x0, y0, x1, y1 = obj.attrs['x0'], obj.attrs['y0'], obj.attrs['x1'], obj.attrs['y1']
xsize, ysize, refstream = obj.attrs['xsize'], obj.attrs['ysize'], obj.refstream
data, encoding = refstream.stream, refstream.encoding
PixmapItem.__init__(self, data, encoding, x0, y0, x1, y1, xsize, ysize)
self.block_id = obj.id
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)
elif obj.name.endswith('ImageBlock'):
return ImageBlock(obj)
elif isinstance(obj, _RuledLine):
return RuledLine(obj)
elif isinstance(obj, __Canvas):
return Canvas(container.font_loader, obj, container.logger, container.opts,
container.ruby_tags, container.link_activated)
return None
class _Canvas(QGraphicsRectItem):
def __init__(self, font_loader, logger, opts, width=0, height=0, parent=None, x=0, y=0):
QGraphicsRectItem.__init__(self, x, y, width, height, parent)
self.font_loader, self.logger, self.opts = font_loader, logger, opts
self.current_y, self.max_y, self.max_x = 0, height, width
self.is_full = False
pen = QPen()
pen.setStyle(Qt.NoPen)
self.setPen(pen)
if not hasattr(self, 'children'):
self.children = self.childItems
def layout_block(self, block, x, y):
if isinstance(block, TextBlock):
self.layout_text_block(block, x, y)
elif isinstance(block, RuledLine):
self.layout_ruled_line(block, x, y)
elif isinstance(block, ImageBlock):
self.layout_image_block(block, x, y)
elif isinstance(block, Canvas):
self.layout_canvas(block, x, y)
def layout_canvas(self, canvas, x, y):
if canvas.max_y + y > self.max_y and y > 0:
self.is_full = True
return
canvas.setParentItem(self)
canvas.setPos(x, y)
canvas.has_content = False
canvas.put_objects()
self.current_y += canvas.max_y
def layout_text_block(self, block, x, y):
textwidth = block.bs.blockwidth - block.bs.sidemargin
if block.max_y == 0 or not block.lines: # Empty block skipping
self.is_full = False
return
line = block.peek()
y += block.bs.topskip
block_consumed = False
line.height = min(line.height, self.max_y-block.bs.topskip) # LRF files from TOR have Plot elements with their height set to 800
while y + line.height <= self.max_y:
block.commit()
if isinstance(line, QGraphicsItem):
line.setParentItem(self)
line.setPos(x + line.getx(textwidth), y)
y += line.height + line.line_space
else:
y += line.height
if not block.has_content:
try:
y += block.bs.footskip
except AttributeError: # makelrf generates BlockStyles without footskip
pass
block_consumed = True
break
else:
line = block.peek()
self.current_y = y
self.is_full = not block_consumed
def layout_ruled_line(self, rl, x, y):
br = rl.boundingRect()
rl.setParentItem(self)
rl.setPos(x, y+1)
self.current_y = y + br.height() + 1
self.is_full = y > self.max_y-5
rl.has_content = False
def layout_image_block(self, ib, x, y):
mw, mh = self.max_x - x, self.max_y - y
if self.current_y + ib.height > self.max_y-y and self.current_y > 5:
self.is_full = True
else:
if ib.width > mw or ib.height > mh:
ib.resize(mw, mh)
br = ib.boundingRect()
max_height = min(br.height(), self.max_y-y)
max_width = min(br.width(), self.max_x-x)
if br.height() > max_height or br.width() > max_width:
p = ib.pixmap()
ib.setPixmap(p.scaled(max_width, max_height, Qt.IgnoreAspectRatio,
Qt.SmoothTransformation))
br = ib.boundingRect()
ib.setParentItem(self)
ib.setPos(x, y)
self.current_y = y + br.height()
self.is_full = y > self.max_y-5
ib.has_content = False
if ib.block_id == 54:
print
print ib.block_id, ib.has_content, self.is_full
print self.current_y, self.max_y, y, br.height()
print
def search(self, phrase):
matches = []
for child in self.children():
if hasattr(child, 'search'):
res = child.search(phrase)
if res:
if isinstance(res, list):
matches += res
else:
matches.append(res)
return matches
class Canvas(_Canvas, ContentObject):
def __init__(self, font_loader, canvas, logger, opts, ruby_tags, link_activated, width=0, height=0):
if hasattr(canvas, 'canvaswidth'):
width, height = canvas.canvaswidth, canvas.canvasheight
_Canvas.__init__(self, font_loader, logger, opts, width=width, height=height)
self.block_id = canvas.id
self.ruby_tags = ruby_tags
self.link_activated = link_activated
self.text_width = width
fg = canvas.framecolor
bg = canvas.bgcolor
if not opts.visual_debug and canvas.framemode != 'none':
self.setPen(Pen(fg, canvas.framewidth))
self.setBrush(QBrush(Color(bg)))
self.items = []
for po in canvas:
obj = po.object
item = object_factory(self, obj, respect_max_y=True)
if item:
self.items.append((item, po.x1, po.y1))
def put_objects(self):
for block, x, y in self.items:
self.layout_block(block, x, y)
def layout_block(self, block, x, y):
block.reset()
_Canvas.layout_block(self, block, x, y)
class Header(Canvas):
def __init__(self, font_loader, header, page_style, logger, opts, ruby_tags, link_activated):
Canvas.__init__(self, font_loader, header, logger, opts, ruby_tags, link_activated,
page_style.textwidth, page_style.headheight)
if opts.visual_debug:
self.setPen(QPen(Qt.blue, 1, Qt.DashLine))
class Footer(Canvas):
def __init__(self, font_loader, footer, page_style, logger, opts, ruby_tags, link_activated):
Canvas.__init__(self, font_loader, footer, logger, opts, ruby_tags, link_activated,
page_style.textwidth, page_style.footheight)
if opts.visual_debug:
self.setPen(QPen(Qt.blue, 1, Qt.DashLine))
class Screen(_Canvas):
def __init__(self, font_loader, chapter, odd, logger, opts, ruby_tags, link_activated):
self.logger, self.opts = logger, opts
page_style = chapter.style
sidemargin = page_style.oddsidemargin if odd else page_style.evensidemargin
width = 2*sidemargin + page_style.textwidth
self.content_x = 0 + sidemargin
self.text_width = page_style.textwidth
self.header_y = page_style.topmargin
self.text_y = self.header_y + page_style.headheight + page_style.headsep
self.text_height = page_style.textheight
self.footer_y = self.text_y + self.text_height + (page_style.footspace - page_style.footheight)
_Canvas.__init__(self, font_loader, logger, opts, width=width, height=self.footer_y+page_style.footheight)
if opts.visual_debug:
self.setPen(QPen(Qt.red, 1, Qt.SolidLine))
header = footer = None
if page_style.headheight > 0:
try:
header = chapter.oddheader if odd else chapter.evenheader
except AttributeError:
pass
if page_style.footheight > 0:
try:
footer = chapter.oddfooter if odd else chapter.evenfooter
except AttributeError:
pass
if header:
header = Header(font_loader, header, page_style, logger, opts, ruby_tags, link_activated)
self.layout_canvas(header, self.content_x, self.header_y)
if footer:
footer = Footer(font_loader, footer, page_style, logger, opts, ruby_tags, link_activated)
self.layout_canvas(footer, self.content_x, self.header_y)
self.page = None
def set_page(self, page):
if self.page is not None and self.page.scene():
self.scene().removeItem(self.page)
self.page = page
self.page.setPos(self.content_x, self.text_y)
self.scene().addItem(self.page)
def remove(self):
if self.scene():
if self.page is not None and self.page.scene():
self.scene().removeItem(self.page)
self.scene().removeItem(self)
class Page(_Canvas):
def __init__(self, font_loader, logger, opts, width, height):
_Canvas.__init__(self, font_loader, logger, opts, width, height)
if opts.visual_debug:
self.setPen(QPen(Qt.cyan, 1, Qt.DashLine))
def id(self):
for child in self.children():
if hasattr(child, 'block_id'):
return child.block_id
def add_block(self, block):
self.layout_block(block, 0, self.current_y)
class Chapter(object):
num_of_pages = property(fget=lambda self: len(self.pages))
def __init__(self, oddscreen, evenscreen, pages, object_to_page_map):
self.oddscreen, self.evenscreen, self.pages, self.object_to_page_map = \
oddscreen, evenscreen, pages, object_to_page_map
def page_of_object(self, id):
return self.object_to_page_map[id]
def page(self, num):
return self.pages[num-1]
def screen(self, odd):
return self.oddscreen if odd else self.evenscreen
def search(self, phrase):
pages = []
for i in range(len(self.pages)):
matches = self.pages[i].search(phrase)
if matches:
pages.append([i, matches])
return pages
class History(collections.deque):
def __init__(self):
collections.deque.__init__(self)
self.pos = 0
def back(self):
if self.pos - 1 < 0:
return None
self.pos -= 1
return self[self.pos]
def forward(self):
if self.pos + 1 >= len(self):
return None
self.pos += 1
return self[self.pos]
def add(self, item):
while len(self) > self.pos+1:
self.pop()
self.append(item)
self.pos += 1
class Document(QGraphicsScene):
num_of_pages = property(fget=lambda self: sum(self.chapter_layout))
chapter_rendered = pyqtSignal(object)
page_changed = pyqtSignal(object)
def __init__(self, logger, opts):
QGraphicsScene.__init__(self)
self.logger, self.opts = logger, opts
self.pages = []
self.chapters = []
self.chapter_layout = None
self.current_screen = None
self.current_page = 0
self.link_map = {}
self.chapter_map = {}
self.history = History()
self.last_search = iter([])
if not opts.white_background:
self.setBackgroundBrush(QBrush(QColor(0xee, 0xee, 0xee)))
def page_of(self, oid):
for chapter in self.chapters:
if oid in chapter.object_to_page_map:
return chapter.object_to_page_map[oid]
def get_page_num(self, chapterid, objid):
cnum = self.chapter_map[chapterid]
page = self.chapters[cnum].object_to_page_map[objid]
return sum(self.chapter_layout[:cnum])+page
def add_to_history(self):
page = self.chapter_page(self.current_page)[1]
page_id = page.id()
if page_id is not None:
self.history.add(page_id)
def link_activated(self, objid, on_creation=None):
if on_creation is None:
cid, oid = self.link_map[objid]
if oid is not None:
self.add_to_history()
page = self.get_page_num(cid, oid)
self.show_page(page)
else:
jb = self.objects[objid]
self.link_map[objid] = (jb.refpage, jb.refobj)
def back(self):
oid = self.history.back()
if oid is not None:
page = self.page_of(oid)
self.show_page(page)
def forward(self):
oid = self.history.forward()
if oid is not None:
page = self.page_of(oid)
self.show_page(page)
def load_fonts(self, lrf, load_substitutions=True):
font_map = {}
for font in lrf.font_map:
fdata = QByteArray(lrf.font_map[font].data)
id = QFontDatabase.addApplicationFontFromData(fdata)
if id != -1:
font_map[font] = [str(i) for i in QFontDatabase.applicationFontFamilies(id)][0]
if load_substitutions:
base = P('fonts/liberation/*.ttf')
for f in glob.glob(base):
QFontDatabase.addApplicationFont(f)
self.font_loader = FontLoader(font_map, self.dpi)
def render_chapter(self, chapter, lrf):
oddscreen, evenscreen = Screen(self.font_loader, chapter, True, self.logger, self.opts, self.ruby_tags, self.link_activated), \
Screen(self.font_loader, chapter, False, self.logger, self.opts, self.ruby_tags, self.link_activated)
pages = []
width, height = oddscreen.text_width, oddscreen.text_height
current_page = Page(self.font_loader, self.logger, self.opts, width, height)
object_to_page_map = {}
for object in chapter:
self.text_width = width
block = object_factory(self, object)
if block is None:
continue
object_to_page_map[object.id] = len(pages) + 1
while block.has_content:
current_page.add_block(block)
if current_page.is_full:
pages.append(current_page)
current_page = Page(self.font_loader, self.logger, self.opts, width, height)
if current_page:
pages.append(current_page)
self.chapters.append(Chapter(oddscreen, evenscreen, pages, object_to_page_map))
self.chapter_map[chapter.id] = len(self.chapters)-1
def render(self, lrf, load_substitutions=True):
self.dpi = lrf.device_info.dpi/10.
self.ruby_tags = dict(**lrf.ruby_tags)
self.load_fonts(lrf, load_substitutions)
self.objects = lrf.objects
num_chaps = 0
for pt in lrf.page_trees:
for chapter in pt:
num_chaps += 1
self.chapter_rendered.emit(num_chaps)
for pt in lrf.page_trees:
for chapter in pt:
self.render_chapter(chapter, lrf)
self.chapter_rendered.emit(-1)
self.chapter_layout = [i.num_of_pages for i in self.chapters]
self.objects = None
def chapter_page(self, num):
for chapter in self.chapters:
if num <= chapter.num_of_pages:
break
num -= chapter.num_of_pages
return chapter, chapter.page(num)
def show_page(self, num):
if num < 1 or num > self.num_of_pages or num == self.current_page:
return
odd = num%2 == 1
self.current_page = num
chapter, page = self.chapter_page(num)
screen = chapter.screen(odd)
if self.current_screen is not None and self.current_screen is not screen:
self.current_screen.remove()
self.current_screen = screen
if self.current_screen.scene() is None:
self.addItem(self.current_screen)
self.current_screen.set_page(page)
self.page_changed.emit(self.current_page)
def next(self):
self.next_by(1)
def previous(self):
self.previous_by(1)
def next_by(self, num):
self.show_page(self.current_page + num)
def previous_by(self, num):
self.show_page(self.current_page - num)
def show_page_at_percent(self, p):
num = self.num_of_pages*(p/100.)
self.show_page(num)
def search(self, phrase):
if not phrase:
return
matches = []
for i in range(len(self.chapters)):
cmatches = self.chapters[i].search(phrase)
for match in cmatches:
match[0] += sum(self.chapter_layout[:i])+1
matches += cmatches
self.last_search = itertools.cycle(matches)
self.next_match()
def next_match(self):
page_num = self.last_search.next()[0]
if self.current_page == page_num:
self.update()
else:
self.add_to_history()
self.show_page(page_num)
|