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addWatermark2pdf.py
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addWatermark2pdf.py
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# -*- coding: utf-8 -*-
from PyPDF2 import PdfFileReader, PdfFileWriter
import sys
import os
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
class QWorkThread(QThread):
progress_changed = pyqtSignal(int, int)
progress_failed = pyqtSignal(str)
def __init__(self, src, dst, water):
super().__init__()
self.src = src
self.dst = dst
self.water = water
def _add_bookmark(self, writer, bookmarks, parent=None):
last = None
for book in bookmarks:
if isinstance(book, list):
self._add_bookmark(writer, book, last)
else:
last = writer.addBookmarkDict(book, parent)
def run(self):
try:
self.add_watermark_to_pdf(self.src, self.dst, self.water)
except Exception as err:
self.progress_failed.emit(str(err))
def add_watermark_to_pdf(self, src, dst, water):
file_src = open(water, 'rb')
water_reader = PdfFileReader(file_src)
water_page = water_reader.getPage(0)
source_reader = PdfFileReader(open(src, 'rb'))
dest_write = PdfFileWriter()
for pageNum in range(0, source_reader.numPages):
self.progress_changed.emit(pageNum + 1, source_reader.numPages)
pdf_page = source_reader.getPage(pageNum)
pdf_page.mergePage(water_page)
dest_write.addPage(pdf_page)
org_info = water_reader.getDocumentInfo()
infos = {}
for k in org_info:
infos[k] = org_info[k]
print(k, org_info[k])
infos['/Producer'] = 'LiuShengKun'
infos['/Title'] = os.path.basename(src)
dest_write.addMetadata(infos)
outlines = source_reader.getOutlines()
self._add_bookmark(dest_write, outlines)
with open(dst, 'wb') as f:
dest_write.write(f)
file_src.close()
self.progress_changed.emit(source_reader.numPages + 1, source_reader.numPages)
class MainWin(QWidget):
thread = None
def __init__(self):
super().__init__()
layout = QGridLayout(self)
pm = QPixmap('./res/app.png')
ico = QIcon(pm)
self.setWindowIcon(ico)
self.edit_src = QLineEdit()
self.edit_src.setFixedWidth(240)
self.edit_src.setPlaceholderText('源文件')
layout.addWidget(self.edit_src, 0, 0, 1, 2)
self.button_src = QPushButton("选择源")
self.button_src.clicked.connect(self.on_select_file)
layout.addWidget(self.button_src, 0, 2)
self.edit_water = QLineEdit()
self.edit_water.setPlaceholderText('水印文件')
layout.addWidget(self.edit_water, 1, 0, 1, 2)
self.button_water = QPushButton("选择水印")
self.button_water.clicked.connect(self.on_select_file)
layout.addWidget(self.button_water, 1, 2)
self.edit_dst = QLineEdit()
self.edit_dst.setPlaceholderText('目标文件')
layout.addWidget(self.edit_dst, 2, 0, 1, 2)
self.button_dst = QPushButton("选择目标")
self.button_dst.clicked.connect(self.on_select_file)
layout.addWidget(self.button_dst, 2, 2)
self.progress = QProgressBar()
self.progress.setRange(0, 1000)
self.progress.setValue(0)
layout.addWidget(self.progress, 3, 0, 1, 3)
self.button_add = QPushButton("添加")
self.button_add.clicked.connect(self.on_add)
layout.addWidget(self.button_add, 4, 1)
def on_select_file(self):
if self.sender() == self.button_dst:
f = QFileDialog.getSaveFileName(self)
else:
f = QFileDialog.getOpenFileNames(self)
if f is None or len(f) == 0:
return
if self.sender() == self.button_src:
self.edit_src.setText(f[0][0])
elif self.sender() == self.button_dst:
self.edit_dst.setText(f[0])
elif self.sender() == self.button_water:
self.edit_water.setText(f[0][0])
def on_progress_changed(self, curr, total):
if curr > total:
self.button_add.setEnabled(True)
self.edit_dst.setEnabled(True)
self.edit_src.setEnabled(True)
self.edit_water.setEnabled(True)
self.button_dst.setEnabled(True)
self.button_water.setEnabled(True)
self.button_src.setEnabled(True)
QMessageBox.information(self, "Information", "成功添加水印")
else:
self.progress.setValue(curr * 1000 / total)
def on_progress_failed(self, err):
self.button_add.setEnabled(True)
self.edit_dst.setEnabled(True)
self.edit_src.setEnabled(True)
self.edit_water.setEnabled(True)
self.button_dst.setEnabled(True)
self.button_water.setEnabled(True)
self.button_src.setEnabled(True)
QMessageBox.critical(self, "Error", "添加失败,原因:\n{}".format(err))
def on_add(self):
self.thread = QWorkThread(self.edit_src.text(), self.edit_dst.text(), self.edit_water.text())
self.thread.progress_changed.connect(self.on_progress_changed)
self.thread.progress_failed.connect(self.on_progress_failed)
self.thread.start()
self.button_add.setEnabled(False)
self.edit_dst.setEnabled(False)
self.edit_src.setEnabled(False)
self.edit_water.setEnabled(False)
self.button_dst.setEnabled(False)
self.button_water.setEnabled(False)
self.button_src.setEnabled(False)
def main():
app = QApplication(sys.argv)
wnd = MainWin()
wnd.show()
sys.exit(app.exec_())
if __name__ == "__main__":
main()