make it possible to activate highlighter only for specific file types

In stage 1 we use a glob pattern matching the file name.
Stage 2 (which I will maybe implement some day) might use some additional magic byte sequence for file type detection.

src/ui/bigtext/bigtext.py

@@ -77,6 +77,7 @@ class BigText(QWidget):
     def __init__(self, model: LogFileModel, show_range_slider=True):
         super(BigText, self).__init__()
 
+        self.show_range_slider = show_range_slider
         self.model = model
 
         self.grid = QGridLayout()
@@ -87,10 +88,7 @@ class BigText(QWidget):
 
         self.v_scroll_bar = ScaledScrollBar()
 
-        self.range_limit = RangeSlider()
-        self.range_limit.value_changed.connect(self._range_limit_event)
-
-        self.big_text = InnerBigText(self, model, self.v_scroll_bar, self.range_limit)
+        self.big_text = InnerBigText(self, model, self.v_scroll_bar)
         self.big_text.setSizePolicy(QSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding))
 
         self.h_scroll_bar = QScrollBar(Qt.Orientation.Horizontal)
@@ -102,9 +100,9 @@ class BigText(QWidget):
         self.v_scroll_bar.scaledValueChanged.connect(self.big_text.v_scroll_event)
         self.v_scroll_bar.scrolled_to_end.connect(self.big_text.v_scroll_update_follow_tail)
 
-
-
         if show_range_slider:
+            self.range_limit = RangeSlider()
+            self.range_limit.value_changed.connect(self._range_limit_event)
             self.grid.addWidget(self.range_limit, 0, 0)
         self.grid.addWidget(self.big_text, 0, 1)
         self.grid.addWidget(self.h_scroll_bar, 1, 1)
@@ -149,14 +147,12 @@ class InnerBigText(QWidget):
     _range_start = 0
     _range_end = -1
 
-    def __init__(self, parent: BigText, model: LogFileModel, v_scaled_scrollbar: ScaledScrollBar,
-                 range_limit: RangeSlider):
+    def __init__(self, parent: BigText, model: LogFileModel, v_scaled_scrollbar: ScaledScrollBar):
         super(InnerBigText, self).__init__()
         self.char_height = None
         self.char_width = None
         self.model = model
         self._v_scaled_scrollbar = v_scaled_scrollbar
-        self._range_limit = range_limit
         self.parent = parent
         self.setFocusPolicy(Qt.FocusPolicy.StrongFocus)
         self.setFocusPolicy(Qt.FocusPolicy.WheelFocus)
@@ -219,7 +215,6 @@ class InnerBigText(QWidget):
         elif e.modifiers() == Qt.KeyboardModifier.ControlModifier and e.key() == 65:  # ctrl + a
             self._select_all()
 
-
     def wheelEvent(self, event: QWheelEvent):
         direction = 1 if event.angleDelta().y() < 0 else -1
         if event.modifiers() == Qt.KeyboardModifier.ControlModifier:
@@ -262,6 +257,7 @@ class InnerBigText(QWidget):
         manage_highlighting.setShortcut("CTRL+H")
         menu.addAction(manage_highlighting)
 
+        if self.parent.show_range_slider:
             menu.addSeparator()
 
             set_range_start = QAction(
@@ -559,6 +555,7 @@ class InnerBigText(QWidget):
         byte_count = self.model.byte_count()
         vmax = byte_count - 1 if self._range_end < 0 else min(self._range_end, self.model.byte_count() - 1)
         self.parent.v_scroll_bar.setMaximum(vmax)
+        if self.parent.show_range_slider:
             self.parent.range_limit.set_maximum(byte_count)
 
         for line in self.lines:

src/ui/bigtext/highlight_regex.py

@@ -1,3 +1,5 @@
+import fnmatch
+import glob
 from typing import Optional
 
 from src.ui.bigtext.highlight import Highlight
@@ -12,7 +14,7 @@ import re
 class HighlightRegex(Highlight):
 
     def __init__(self, query: str, ignore_case: bool, is_regex: bool, hit_background_color: str = "None",
-                 line_background_color: str = "None", active: bool = True):
+                 line_background_color: str = "None", active: bool = True, activated_for_file_type: str = "*"):
         self.active = active
         self.query = query
         self.ignore_case = ignore_case
@@ -20,6 +22,7 @@ class HighlightRegex(Highlight):
         self.regex = self._get_regex()
         self.hit_background_color = hit_background_color
         self.line_background_color = line_background_color
+        self.activated_for_file_type = activated_for_file_type
         self._brush_hit = self.brush(self.hit_background_color)
         self._brush_line = self.brush(self.line_background_color)
 
@@ -99,3 +102,15 @@ class HighlightRegex(Highlight):
             alpha = int(color[6:8], 16)
             return QBrush(QColor(red, green, blue, alpha))
         return QBrush()
+
+    def set_activated_for_file_type(self, activated_for_file_type: str):
+        self.activated_for_file_type = activated_for_file_type
+
+    def file_type_matches(self, file_name: str) -> bool:
+        if self.activated_for_file_type is None or len(self.activated_for_file_type) == 0:
+            return True
+        glob_patterns: [str] = self.activated_for_file_type.split(",")  # support multiple globs like: "*.txt, *.csv"
+        for glob_pattern in glob_patterns:
+            if fnmatch.fnmatch(file_name, glob_pattern.strip()):
+                return True
+        return False

src/ui/bigtext/highlighting.py

@@ -25,6 +25,7 @@ class Highlighting:
             is_regex = session.getboolean(section, "is-regex", fallback=False)
             line_background_color = session.get(section, "line.background.color", fallback="None")
             hit_background_color = session.get(section, "hit.background.color", fallback="None")
+            activated_for_file_type = session.get(section, "activated-for-file-type", fallback="*")
 
             try:
                 highlight = HighlightRegex(
@@ -33,7 +34,8 @@ class Highlighting:
                     is_regex=is_regex,
                     hit_background_color=hit_background_color,
                     line_background_color=line_background_color,
-                    active=active
+                    active=active,
+                    activated_for_file_type=activated_for_file_type
                 )
                 result.append(highlight)
             except:
@@ -57,6 +59,7 @@ class Highlighting:
             settings.session.set(section, "is-regex", str(highlighter.is_regex))
             settings.session.set(section, "line.background.color", highlighter.line_background_color)
             settings.session.set(section, "hit.background.color", highlighter.hit_background_color)
+            settings.session.set(section, "activated-for-file-type", highlighter.activated_for_file_type)
 
     @staticmethod
     def remove_highlighting_sections(settings: Settings):

src/ui/bigtext/logFileModel.py

@@ -24,12 +24,13 @@ class LogFileModel:
     def __init__(self, file: str, settings: Settings):
         self.settings = settings
         self._file = os.path.realpath(file)
+        self._file_name = os.path.basename(self._file)
 
     def highlighters(self):
         all_highlighters = Highlighting.read_config(self.settings)
         active_highlighters = []
         for h in all_highlighters:
-            if h.is_active():
+            if h.is_active() and h.file_type_matches(self._file_name):
                 active_highlighters.append(h)
         return active_highlighters
 

src/ui/bigtext/newhighlightingdialog.py

@@ -118,7 +118,7 @@ class NewHighlightingDialog(QDialog):
 
     def _new_highlighter(self):
         highlight_regex = HighlightRegex("", ignore_case=True, is_regex=True, hit_background_color="ccb400",
-                                         line_background_color="fff080")
+                                         line_background_color="None")
         self._add_highlight_regex_to_list(highlight_regex, select=True)
 
 
@@ -139,7 +139,7 @@ class HighlightListItemWidget(QWidget):
         self.active = QCheckBox("")
         self.active.setChecked(highlight_regex.is_active())
         self.active.stateChanged.connect(self._change_active_state)
-        self.layout.addWidget(self.active, row, 0, 3, 1, alignment=QtCore.Qt.AlignmentFlag.AlignVCenter)
+        self.layout.addWidget(self.active, row, 0, 4, 1, alignment=QtCore.Qt.AlignmentFlag.AlignVCenter)
 
         query = QLineEdit(self)
         query.setText(highlight_regex.query)
@@ -181,6 +181,18 @@ class HighlightListItemWidget(QWidget):
         is_regex.setEnabled(highlight_regex.is_active())
         self.layout.addWidget(is_regex, row, 3)
 
+        row = row + 1
+        activated_for_file_type_label = QLabel(_("File Type:"), self)
+        activated_for_file_type_label.setEnabled(highlight_regex.is_active())
+        self.layout.addWidget(activated_for_file_type_label, row, 1)
+        activated_for_file_type = QLineEdit(self)
+        activated_for_file_type.setEnabled(highlight_regex.is_active())
+        activated_for_file_type.setText(highlight_regex.activated_for_file_type)
+        activated_for_file_type.textChanged[str].connect(
+            lambda: highlight_regex.set_activated_for_file_type(activated_for_file_type.text()))
+        self.layout.addWidget(activated_for_file_type, row, 2)
+
+
     def _change_active_state(self):
         active = self.active.isChecked()
         self.highlight_regex.set_active(active)

src/ui/rangeslider.py

@@ -44,8 +44,6 @@ class RangeSlider(QWidget):
         super(RangeSlider, self).__init__()
         self.setFixedWidth(self._width)
 
-        self.draw_ticks = False
-
         self.min_value = 0
         self.max_value = 100
 
@@ -54,6 +52,7 @@ class RangeSlider(QWidget):
 
         self.selected_handle = None
         self.selection_drag_range = (self.min_value, self.max_value)
+        self.drag_y_offset_in_handle = 0
 
     def set_maximum(self, max: int):
         if self.max_value == max:
@@ -69,8 +68,6 @@ class RangeSlider(QWidget):
     def paintEvent(self, event: PySide6.QtGui.QPaintEvent) -> None:
         painter = QPainter(self)
         self._draw_background(painter)
-        if self.draw_ticks:
-            self._draw_ticks(painter)
         self._draw_handle(painter, self.lower_value)
         self._draw_handle(painter, self.upper_value, direction=-1)
 
@@ -90,19 +87,6 @@ class RangeSlider(QWidget):
                      self._value_to_pixel(self.upper_value.value - self.lower_value.value) - 2 * self._handle_width)
         painter.drawRoundedRect(rect, 3.0, 3.0)
 
-    def _draw_ticks(self, painter: QPainter) -> None:
-        painter.setPen(to_qcolor("333333"))
-
-        min_tick_distance = 25
-        full_height = self.height() - 2 * self._handle_width
-        ticks = math.floor(full_height / min_tick_distance)
-        actual_tick_distance = full_height / ticks
-        print(f"ticks {ticks}")
-        y = actual_tick_distance + self._handle_width
-        while y < full_height:
-            painter.drawLine(8, y, 12, y)
-            y = y + actual_tick_distance
-
     def _draw_handle(self, painter: QPainter, handle: RangeSliderHandle, direction=1) -> None:
         y_pixel = self._value_to_pixel(handle.value)
 
@@ -144,9 +128,11 @@ class RangeSlider(QWidget):
             if self._is_on_handle(self.lower_value, pos.y(), direction=1):
                 self.selected_handle = self.lower_value
                 self.selection_drag_range = (self.min_value, self.upper_value.value)
+                self.drag_y_offset_in_handle = self.selected_handle.value - self._pixel_to_value(pos.y())
             if self._is_on_handle(self.upper_value, pos.y(), direction=-1):
                 self.selected_handle = self.upper_value
                 self.selection_drag_range = (self.lower_value.value, self.max_value)
+                self.drag_y_offset_in_handle = self.selected_handle.value - self._pixel_to_value(pos.y())
 
     def mouseReleaseEvent(self, event: PySide6.QtGui.QMouseEvent) -> None:
         self.selected_handle = None
@@ -154,7 +140,7 @@ class RangeSlider(QWidget):
     def mouseMoveEvent(self, e: PySide6.QtGui.QMouseEvent) -> None:
         if self.selected_handle != None:
             pos: QPoint = e.pos()
-            value = self._pixel_to_value(pos.y())
+            value = self._pixel_to_value(pos.y()) + self.drag_y_offset_in_handle
             if self.selection_drag_range[0] <= value <= self.selection_drag_range[1]:
                 self.selected_handle.value = value
                 # print("%s, %s" %(self.lower_value.value, self.upper_value.value))