164 lines
5.0 KiB
Python
164 lines
5.0 KiB
Python
# Python imports
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import os
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import requests
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import subprocess
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# Lib imports
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import gi
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gi.require_version('Gtk', '3.0')
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gi.require_version('GtkSource', '4')
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from gi.repository import Gtk
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from gi.repository import GLib
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from gi.repository import GtkSource
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# Application imports
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class OCRWindow(Gtk.Window):
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def __init__(self):
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super(OCRWindow, self).__init__()
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self.tesseract_path = f"{settings.get_home_config_path()}/tesseract-ocr.AppImage"
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self.download_url = "https://github.com/AlexanderP/tesseract-appimage/releases/download/v5.3.3/tesseract-5.3.3-x86_64.AppImage"
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self._setup_styling()
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self._setup_signals()
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self._subscribe_to_events()
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self._load_widgets()
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def _setup_styling(self):
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self.set_title(f"Tesseract OCR")
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self.set_icon_from_file( settings.get_window_icon() )
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self.set_gravity(5) # 5 = CENTER
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self.set_position(1) # 1 = CENTER, 4 = CENTER_ALWAYS
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self.set_default_size(480, 600)
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self.set_size_request(480, 600)
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def _setup_signals(self):
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self.connect("delete-event", self._tear_down)
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def _subscribe_to_events(self):
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event_system.subscribe("show_ocr", self._show_ocr)
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def _load_widgets(self):
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scrolled_window = Gtk.ScrolledWindow()
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box = Gtk.Box()
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download_button = Gtk.Button(label = "Download Tesseract OCR")
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run_ocr_button = Gtk.Button(label = "Run OCR")
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text_view = GtkSource.View()
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download_button.set_tooltip_text("Download Tesseract OCR")
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run_ocr_button.set_tooltip_text("Run OCR")
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download_button.connect("clicked", self._download_tesseract_ocr)
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run_ocr_button.connect("clicked", self._run_ocr_button)
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box.set_orientation(Gtk.Orientation.VERTICAL)
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text_view.set_vexpand(True)
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text_view.set_show_line_numbers(True)
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ctx = scrolled_window.get_style_context()
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ctx.add_class("container-padding-5px")
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scrolled_window.add(text_view)
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box.add(download_button)
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box.add(run_ocr_button)
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box.add(scrolled_window)
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self.add(box)
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box.show_all()
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if os.path.exists(self.tesseract_path):
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download_button.hide()
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else:
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run_ocr_button.hide()
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text_view.hide()
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def _show_ocr(self):
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self.show()
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def _tear_down(self, widget = None, eve = None):
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self.hide()
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# Return True to NOT propigate call (would actually destroy window n children)
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return True
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def _download_tesseract_ocr(self, button):
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parent = button.get_parent()
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spinner = Gtk.Spinner.new()
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parent.add(spinner)
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GLib.idle_add(self.__download_file, self.download_url, spinner)
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@daemon_threaded
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def __download_file(self, url = None, spinner = None):
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if not url: return
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if not spinner: return
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if not url == self.download_url: return
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spinner.show()
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spinner.start()
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# NOTE the stream = True parameter below
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with requests.get(url, stream = True) as r:
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r.raise_for_status()
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with open(self.tesseract_path, 'wb') as f:
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for chunk in r.iter_content(chunk_size = 8192):
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# If chunk encoded response uncomment and set chunk_size parameter to None.
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# if chunk:
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f.write(chunk)
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spinner.stop()
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GLib.idle_add(self.__process_dl_finished, spinner)
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def __process_dl_finished(self, spinner = None):
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if not spinner: return
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parent = spinner.get_parent()
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download_button, \
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run_ocr_button, \
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text_view, \
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spinner = parent.get_children()
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parent.remove(spinner)
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if os.path.exists(self.tesseract_path):
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self.__set_as_executable(self.tesseract_path)
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run_ocr_button.show()
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text_view.show()
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download_button.hide()
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def __set_as_executable(self, tesseract_path):
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if not tesseract_path: return
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os.access(tesseract_path, os.X_OK)
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try:
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command = ["chmod", "544", tesseract_path]
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with subprocess.Popen(command, stdout = subprocess.PIPE) as proc:
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result = proc.stdout.read().decode("UTF-8").strip()
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except Exception as e:
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logger.error(f"Couldn't chmod\nFile: {properties.file_uri}")
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logger.error( repr(e) )
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def _run_ocr_button(self, button):
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active_image = event_system.emit_and_await("get_active_image_path")
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if not active_image: return
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scrolled_window = button.get_parent().get_children()[2]
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text_view = scrolled_window.get_children()[0]
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command = [self.tesseract_path, active_image, "stdout"]
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result = subprocess.run(command, stdout = subprocess.PIPE)
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data = result.stdout.decode('utf-8')
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logger.debug(command)
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logger.debug(data)
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text_view.get_buffer().set_text(data, -1)
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