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eaf_pdf_page.py
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eaf_pdf_page.py
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# -*- coding: utf-8 -*-
# Copyright (C) 2018 Andy Stewart
#
# Author: Andy Stewart <[email protected]>
# Maintainer: Andy Stewart <[email protected]>
#
# 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 3 of the License, or
# 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, see <http://www.gnu.org/licenses/>.
import fitz
from core.utils import get_emacs_vars
from eaf_pdf_utils import generate_random_key, support_hit_max
from PyQt6.QtCore import QRect, QRectF
from PyQt6.QtGui import QColor, QCursor, QImage, QPainter, QPixmap
from PyQt6.QtWidgets import QToolTip
def set_page_crop_box(page):
if hasattr(page, "set_cropbox"):
return page.set_cropbox
else:
return page.setCropBox
def get_page_text(page):
if hasattr(page, "get_text"):
return page.get_text
else:
return page.getText
def set_page_rotation(page):
if hasattr(page, "set_rotation"):
return page.set_rotation
else:
return page.setRotation
def get_page_pixmap(page):
if hasattr(page, "get_pixmap"):
return page.get_pixmap
else:
return page.getPixmap
def pixmap_invert_irect(pixmap):
if hasattr(pixmap, "invert_irect"):
return pixmap.invert_irect
else:
return pixmap.invertIRect
def get_page_image_list(page):
if hasattr(page, "get_images"):
return page.get_images
else:
return page.getImageList
def get_page_image_bbox(page):
if hasattr(page, "get_image_bbox"):
return page.get_image_bbox
else:
return page.getImageBbox
class PdfPage(fitz.Page):
def __init__(self, page, page_index, is_pdf, clip=None):
self.page = page
self.page_index = page_index
self.is_pdf = is_pdf
self.clip = clip or page.cropbox
self._mark_link_annot_list = []
self._mark_search_annot_list = []
self._mark_jump_annot_list = []
self._page_rawdict = self._init_page_rawdict()
self._page_char_rect_list = self._init_page_char_rect_list()
self._tight_margin_rect = self._init_tight_margin()
self.has_annot = page.first_annot
self.hovered_annot = None
def __getattr__(self, attr):
return getattr(self.page, attr)
def _init_page_rawdict(self):
if self.is_pdf:
try:
# Must set CropBox before get page rawdict , if no,
# the rawdict bbox coordinate is wrong
# cause the select text failed
set_page_crop_box(self.page)(self.clip)
d = get_page_text(self.page)("rawdict")
# cancel the cropbox, if not, will cause the pixmap set cropbox
# don't begin on top-left(0, 0), page display black margin
set_page_crop_box(self.page)(fitz.Rect(self.page.mediabox.x0,0,self.page.mediabox.x1,self.page.mediabox.y1-self.page.mediabox.y0))
return d
except:
return get_page_text(self.page)("rawdict")
else:
return get_page_text(self.page)("rawdict")
def _init_page_char_rect_list(self):
'''Collection page char rect list when page init'''
lines_list = []
spans_list = []
chars_list = []
for block in self._page_rawdict["blocks"]:
if "lines" in block:
lines_list += block["lines"]
for line in lines_list:
if "spans" in line:
spans_list += line["spans"]
for span in spans_list:
if "chars" in span:
chars_list += span["chars"]
return chars_list
def _init_tight_margin(self):
r = None
for block in self._page_rawdict["blocks"]:
# ignore image bbox
if block["type"] != 0:
continue
x0, y0, x1, y1 = block["bbox"]
if r is None:
r = fitz.Rect(x0, y0, x1, y1)
continue
x0 = min(x0, r.x0)
y0 = min(y0, r.y0)
x1 = max(x1, r.x1)
y1 = max(y1, r.y1)
r = fitz.Rect(x0, y0, x1, y1)
if r is None:
return self.page.cropbox
return r
def get_tight_margin_rect(self):
# if current page don't computer tight rect
# return None
if self._tight_margin_rect == self.page.mediabox:
return None
return self._tight_margin_rect
def get_page_char_rect_list(self):
return self._page_char_rect_list
def get_page_char_rect_index(self, x, y):
'''According X and Y coordinate return index of char in char rect list.'''
if x and y is None:
return None
offset = 15
rect = fitz.Rect(x, y, x + offset, y + offset)
for char_index, char in enumerate(self._page_char_rect_list):
if fitz.Rect(char["bbox"]).intersects(rect):
return char_index
return None
def set_rotation(self, rotation):
set_page_rotation(self.page)(rotation)
if rotation % 180 != 0:
self.page_width = self.page.cropbox.height
self.page_height = self.page.cropbox.width
else:
self.page_width = self.page.cropbox.width
self.page_height = self.page.cropbox.height
def get_qpixmap(self, scale, invert, invert_image=False):
if self.is_pdf:
try:
set_page_crop_box(self.page)(self.clip)
except:
pass
pixmap = get_page_pixmap(self.page)(matrix=fitz.Matrix(scale, scale), alpha=True)
if invert:
# make background transparent
sample_color = pixmap.pixel(0,0)
if sample_color[3] == 255:
pixmap = self.make_background_transparent(pixmap, sample_color[:3])
elif sample_color[3] == 0:
pixmap = self.make_background_transparent(pixmap, (255,255,255))
pixmap_invert_irect(pixmap)(pixmap.irect)
if not invert_image and invert:
pixmap = self.with_invert_exclude_image(scale, pixmap)
img = QImage(pixmap.samples, pixmap.width, pixmap.height, pixmap.stride, QImage.Format.Format_RGBA8888)
qpixmap = QPixmap.fromImage(img)
if self.has_annot:
qpixmap = self.draw_annots(qpixmap, scale)
return qpixmap
def draw_annots(self, pixmap, scale):
if self.hovered_annot is None:
return pixmap
qp = QPainter(pixmap)
qp.setRenderHint(QPainter.RenderHint.Antialiasing)
qp.setCompositionMode(QPainter.CompositionMode.CompositionMode_DestinationAtop)
annot = self.hovered_annot
r, g, b = getattr(annot.colors, "stroke", (1.0, 0.84, 0.08))
color = QColor(int(r) * 255, int(g) * 255, int(b) * 255, 153)
vertices = annot.vertices
if vertices is not None and len(vertices) % 4 == 0:
for i in range(0, len(vertices), 4):
# top-left and bottom-right point
rect = fitz.Rect(vertices[i], vertices[i+3]) * scale
qrect = QRectF(rect.x0, rect.y0, rect.width, rect.height)
qp.fillRect(qrect, color)
else:
rect = annot.rect
qrect = QRectF(rect.x0, rect.y0, rect.width, rect.height)
qp.fillRect(qrect, color)
if annot and annot.info["content"]:
QToolTip.showText(QCursor.pos(), annot.info["content"], None, QRect(), 10 * 1000)
else:
if QToolTip.isVisible():
QToolTip.hideText()
return pixmap
def can_update_annot(self, page_x, page_y):
if not self.has_annot:
return None, False
point = fitz.Point(page_x, page_y)
for annot in self.page.annots():
if point in annot.rect:
self.hovered_annot = annot
return annot, True
if self.hovered_annot is not None:
self.hovered_annot = None
return None, True
return None, False
def make_background_transparent(self, pixmap, opaque_color):
pixalpha = fitz.Pixmap(None, pixmap)
alpha = pixalpha.samples
pixmap.set_alpha(alpha, 1, opaque=opaque_color)
return pixmap
def with_invert_exclude_image(self, scale, pixmap):
# steps:
# First, make page all content is invert, include image and text.
# if exclude image is True, will find the page all image, then get
# each image rect. Finally, again invert all image rect.
self.page.clean_contents()
# exclude image only support PDF document
imagelist = None
try:
imagelist = get_page_image_list(self.page)(full=True)
except Exception:
# PyMupdf 1.14 not include argument 'full'.
imagelist = get_page_image_list(self.page)
page_words = self.page.get_text_words()
image_rects = []
for image in imagelist:
try:
imagerect, _ = get_page_image_bbox(self.page)(image, True)
# Don't invert image if it is infinite, empty or intersect with words.
if imagerect.is_infinite or imagerect.is_empty or self.image_intersect_with_words(imagerect, page_words):
continue
intersects = []
for rect in image_rects:
intersect = fitz.Rect(rect).intersect(imagerect)
if intersect.is_infinite or intersect.is_empty:
continue
intersects.append(intersect)
image_rects.append(imagerect)
image_rects.extend(intersects)
except Exception:
import traceback
traceback.print_exc()
for rect in image_rects:
pixmap_invert_irect(pixmap)(rect * self.page.rotation_matrix * scale)
return pixmap
def image_intersect_with_words(self, imagerect, page_words):
"If a image intersect with page words, there is a high probability that this picture is a watermark."
for page_word in page_words:
if fitz.Rect(page_word[:4]).intersects(imagerect):
return True
return False
def add_mark_link(self):
if self.page.first_link:
for link in self.page.get_links():
annot = self.page.add_underline_annot(link["from"])
annot.parent = self.page # Must assign annot parent, else delete_annot cause parent is None problem.
self._mark_link_annot_list.append(annot)
def cleanup_mark_link(self):
if self._mark_link_annot_list:
for annot in self._mark_link_annot_list:
self.page.delete_annot(annot)
self._mark_link_annot_list = []
def mark_search_text(self, keyword, current_quads):
self.cleanup_search_text()
if support_hit_max:
quads_list = self.page.searchFor(keyword, hit_max=999, quads=True)
else:
quads_list = self.page.search_for(keyword, quads=True)
if quads_list:
for quads in quads_list:
annot = self.page.add_highlight_annot(quads)
annot.parent = self.page
if quads == current_quads:
qcolor = QColor("#f28100")
annot.set_colors(stroke=qcolor.getRgbF()[0:3])
annot.update()
self._mark_search_annot_list.append(annot)
def cleanup_search_text(self):
if self._mark_search_annot_list:
# message_to_emacs("Unmarked all matched results.")
for annot in self._mark_search_annot_list:
self.page.delete_annot(annot)
self._mark_search_annot_list = []
def mark_jump_link_tips(self, letters):
fontsize, = get_emacs_vars(["eaf-pdf-marker-fontsize"])
cache_dict = {}
if self.page.first_link:
links = self.page.get_links()
key_list = generate_random_key(len(links), letters)
for index, link in enumerate(links):
key = key_list[index]
link_rect = link["from"]
annot_rect = fitz.Rect(link_rect.top_left, link_rect.x0 + fontsize/1.2 * len(key), link_rect.y0 + fontsize)
annot = self.page.add_freetext_annot(annot_rect, str(key), fontsize=fontsize, fontname="Helv", \
text_color=[0.0, 0.0, 0.0], fill_color=[255/255.0, 197/255.0, 36/255.0], \
align = 1)
annot.parent = self.page
self._mark_jump_annot_list.append(annot)
cache_dict[key] = link
return cache_dict
def cleanup_jump_link_tips(self):
for annot in self._mark_jump_annot_list:
self.page.delete_annot(annot)
self._mark_jump_annot_list = []