import math import os import re import time from typing import Optional, List import PyQt6.QtGui from PyQt6 import QtGui from PyQt6.QtCore import * from PyQt6.QtGui import * from PyQt6.QtGui import QMouseEvent from PyQt6.QtWidgets import * from ScaledScrollBar import ScaledScrollBar from highlight import Highlight from highlight_regex import HighlightRegex from highlight_selection import HighlightSelection from highlighted_range import HighlightedRange from line import Line from logFileModel import LogFileModel import re from ravenui import RavenUI from settings import Settings from watchdog.observers import Observer from watchdog.events import FileSystemEventHandler import threading class FileObserver(FileSystemEventHandler): def __init__(self, big_text): super(FileObserver, self).__init__() self.big_text = big_text def on_modified(self, event): # slow down the updates. This is needed, because the file is modified # constantly, which would lead to constant re-rendering, which would # block the UI thread an make the UI unresponsive. # Note: we don't miss events, because they are queued and de-duplicated time.sleep(0.5) self.big_text.update() class FileWatchdogThread(QRunnable): def __init__(self, big_text, file: str): super(FileWatchdogThread, self).__init__() self.file = file self.big_text = big_text self.observer = Observer() def run(self) -> None: self.observer.schedule(FileObserver(self.big_text), self.file) self.observer.start() def destruct(self): self.observer.stop() class BigText(QWidget): def __init__(self, model: LogFileModel): super(BigText, self).__init__() self.model = model self.watchdog = FileWatchdogThread(self, model.get_file()) QThreadPool.globalInstance().start(self.watchdog) self.grid = QGridLayout() self.grid.setContentsMargins(0, 0, 0, 0) self.grid.setHorizontalSpacing(0) self.grid.setVerticalSpacing(0) self.setLayout(self.grid) big_text = InnerBigText(self, model) big_text.setSizePolicy(QSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding)) self.h_scroll_bar = QScrollBar(Qt.Orientation.Horizontal) self.h_scroll_bar.setMinimum(0) self.h_scroll_bar.setMaximum(1) self.h_scroll_bar.valueChanged.connect(big_text.h_scroll_event) self.v_scroll_bar = ScaledScrollBar() self.v_scroll_bar.setPageStep(1) self.v_scroll_bar.valueChanged.connect(big_text.v_scroll_event) self.grid.addWidget(big_text, 0, 0) self.grid.addWidget(self.h_scroll_bar, 1, 0) self.grid.addWidget(self.v_scroll_bar, 0, 1) def get_file(self): return self.model.get_file() def destruct(self): self.watchdog.destruct() class InnerBigText(QWidget): _byte_offset = 0 _left_offset = 0 scroll_lines = 0 longest_line = 0 def __init__(self, parent: BigText, model: LogFileModel): super(InnerBigText, self).__init__() self.model = model self.parent = parent self.setFocusPolicy(Qt.FocusPolicy.StrongFocus) self.setFocusPolicy(Qt.FocusPolicy.WheelFocus) self.update_font_metrics(QPainter(self)) self.lines = [] self.selection_highlight = HighlightSelection() def keyPressEvent(self, e: QKeyEvent) -> None: # print("%s + %s" % (e.keyCombination().keyboardModifiers(), e.key())) if e.modifiers() == Qt.KeyboardModifier.NoModifier: lines_to_scroll = math.floor(self.lines_shown()) - 1 if e.key() == Qt.Key.Key_PageUp: self.scroll_by_lines(-lines_to_scroll) if e.key() == Qt.Key.Key_PageDown: self.scroll_by_lines(lines_to_scroll) if e.key() == 16777235: # page up self.scroll_by_lines(-3) if e.key() == 16777237: # page down self.scroll_by_lines(3) if e.modifiers() == Qt.KeyboardModifier.ControlModifier and e.key() == 67: # ctrl + c self.copy_selection() if e.modifiers() == Qt.KeyboardModifier.ControlModifier and e.key() == 65: # ctrl + a self.selection_highlight.start_byte = 0 self.selection_highlight.end_byte = self.model.byte_count() self.update() def wheelEvent(self, event: QWheelEvent): direction = 1 if event.angleDelta().y() < 0 else -1 if event.modifiers() == Qt.KeyboardModifier.ControlModifier: # self.model.settings.update_font_size(-direction) old_font_size = self.model.settings.getint_session('general', 'font_size') new_font_size = max(4, min(50, old_font_size - direction)) self.model.settings.set_session('general', 'font_size', str(new_font_size)) RavenUI.update_ui() self.update() else: # print("wheel event fired :) %s" % (direction)) self.scroll_by_lines(direction * 3) def scroll_by_lines(self, scroll_lines: int): self.scroll_lines = scroll_lines self.update() self.parent.v_scroll_bar.setValue(self._byte_offset) def mousePressEvent(self, e: QtGui.QMouseEvent) -> None: if e.buttons() == Qt.MouseButton.LeftButton: offset = self.to_byte_offset(e) self.selection_highlight.set_start(offset) self.selection_highlight.set_end_byte(offset) self.update() def mouseMoveEvent(self, e: QMouseEvent): current_byte = self.to_byte_offset(e) if self.selection_highlight.end_byte != current_byte: self.selection_highlight.set_end_byte(current_byte) self.update() # print("-> %s,%s" %(self._selection_start_byte, self._selection_end_byte)) line_number = self.y_pos_to_line(e.pos().y()) column_in_line = self.x_pos_to_column(e.pos().x()) if line_number == 0: self.scroll_by_lines(-1) if line_number + 1 >= int(self.lines_shown()): self.scroll_by_lines(1) if column_in_line <= 1: self._left_offset = max(0, self._left_offset - 2) self.update() if column_in_line + 1 >= self.columns_shown(): self._left_offset = self._left_offset + 2 self.update() def h_scroll_event(self, left_offset: int): self._left_offset = left_offset # print("left_offset: %d" % left_offset) self.update() def v_scroll_event(self, byte_offset: int): self._byte_offset = byte_offset self.update() def update_longest_line(self, length: int): width_in_chars = self.width() / self.char_width # print("width_in_chars: %d" % width_in_chars) if self.longest_line < length: self.longest_line = length maximum = max(0, length - width_in_chars + 1) self.parent.h_scroll_bar.setMaximum(maximum) def y_pos_to_line(self, y: int) -> int: return int(y / self.char_height) def x_pos_to_column(self, x: int) -> int: return round(x / self.char_width) def lines_shown(self) -> float: return self.height() / float(self.char_height) def columns_shown(self) -> float: return self.width() / float(self.char_width) def to_byte_offset(self, e: QMouseEvent) -> int: line_number = self.y_pos_to_line(e.pos().y()) if line_number < len(self.lines): line = self.lines[line_number] column_in_line = self.x_pos_to_column(e.pos().x()) + self._left_offset char_in_line = min(column_in_line, line.length()) # print("%s in line %s" % (char_in_line, line_number)) byte_in_line = line.char_index_to_byte(char_in_line) current_byte = line.byte_offset() + byte_in_line # print("%s + %s = %s" % (line.byte_offset(), char_in_line, current_byte)) else: current_byte = self.model.byte_count() return current_byte def copy_selection(self): if self.selection_highlight.start_byte != self.selection_highlight.end_byte: start = min(self.selection_highlight.start_byte, self.selection_highlight.end_byte) end = max(self.selection_highlight.start_byte, self.selection_highlight.end_byte) selected_text = self.model.read_range(start, end) cb = QApplication.clipboard() cb.setText(selected_text) def paintEvent(self, event: QPaintEvent) -> None: # print("paintEvent") painter = QPainter(self) # painter.setFont(self.model.settings.font()) painter.setFont(QFont("monospace", self.model.settings.getint_session('general', "font_size"))) painter.setPen(QColor(0, 0, 0)) self.update_font_metrics(painter) lines_to_show = self.lines_shown() # print("%s / %s = %s" %(self.height(), float(self.char_height), lines_to_show)) self.lines = self.model.data(self._byte_offset, self.scroll_lines, lines_to_show) # print("lines_to_show: %d returned: %d" % (lines_to_show, len(self.lines))) self.scroll_lines = 0 self._byte_offset = self.lines[0].byte_offset() if len(self.lines) > 0 else 0 # document length == maximum + pageStep + aFewBytesSoThatTheLastLineIsShown self.parent.v_scroll_bar.setMaximum(self.model.byte_count() - 1) for l in self.lines: self.update_longest_line(len(l.line())) highlighters = self.model.highlights if self.model.get_query_highlight(): highlighters = highlighters + [self.model.get_query_highlight()] highlighters = highlighters + [self.selection_highlight] # selection highlight should be last # draw hightlights first - some characters may overlap to the next line # by drawing the background hightlights first we prevent that the hightlight # draws over a character y_line_offset = self.char_height; for l in self.lines: for h in highlighters: optional_highlight_range = h.compute_highlight(l) if optional_highlight_range: for highlight in optional_highlight_range: self.draw_highlight(highlight, painter, y_line_offset) y_line_offset = y_line_offset + self.char_height left_offset = -1 * self._left_offset * self.char_width y_line_offset = self.char_height; for l in self.lines: painter.drawText(left_offset, y_line_offset, l.line()) y_line_offset = y_line_offset + self.char_height painter.end() def draw_highlight(self, highlight: HighlightedRange, painter: QPainter, y_line_offset: int): left_offset = -1 * self._left_offset * self.char_width x1 = highlight.get_start() * self.char_width width = highlight.get_width() * self.char_width y1 = y_line_offset - self.char_height + self.char_height / 7 height = self.char_height if highlight.is_highlight_full_line(): full_width = Settings.max_line_length() * self.char_width rect = QRect(left_offset, y1, full_width, height) self.highlight_background(painter, rect, highlight.get_brush_full_line()) rect = QRect(left_offset + x1, y1, width, height) self.highlight_background(painter, rect, highlight.get_brush()) def highlight_background(self, painter: QPainter, rect: QRect, brush: QBrush): old_brush = painter.brush() old_pen = painter.pen() painter.setBrush(brush) painter.setPen(Qt.PenStyle.NoPen) painter.drawRoundedRect(rect, 3.0, 3.0) painter.setBrush(old_brush) painter.setPen(old_pen) def update_font_metrics(self, painter: QPainter): fm: QFontMetrics = painter.fontMetrics() self.char_height = fm.height() self.char_width = fm.averageCharWidth() # all chars have same width for monospace font text = "012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789" self.char_width = fm.horizontalAdvance(text) / float(len(text)) # print("font width=%s height=%s" % (self.char_width, self.char_height))