move files into a package structure

raven/ui/bigtext/highlight_selection.py

@@ -0,0 +1,56 @@
+from typing import Optional, List
+
+from raven.ui.bigtext.highlight import Highlight
+from raven.ui.bigtext.highlighted_range import HighlightedRange
+from raven.ui.bigtext.line import Line
+from PySide6.QtCore import Qt
+from PySide6.QtGui import QBrush, QColor
+
+from raven.settings.settings import Settings
+
+
+class HighlightSelection(Highlight):
+    start_byte = 0
+    end_byte = 0
+
+    def set_start(self, start_byte):
+        self.start_byte = start_byte
+
+    def set_end_byte(self, end_byte):
+        self.end_byte = end_byte
+
+    def compute_highlight(self, line: Line) -> Optional[List[HighlightedRange]]:
+        begin = min(self.start_byte, self.end_byte)
+        end = max(self.start_byte, self.end_byte)
+
+        if line.intersects(begin, end):
+            if line.includes_byte(begin):
+                start_byte_in_line = begin - line.byte_offset()
+            else:
+                start_byte_in_line = 0
+
+            start_char = line.byte_index_to_char_index(start_byte_in_line)
+
+            if line.includes_byte(end):
+                length_in_bytes = end - line.byte_offset() - start_byte_in_line
+                end_char = line.byte_index_to_char_index(start_byte_in_line + length_in_bytes)
+            else:
+                # renders the highlighting to the end of the line
+                # this is how selections usually behave
+                length_in_bytes = Settings.max_line_length() - start_byte_in_line
+
+                # note: this mixes chars and bytes, but that should not matter, because
+                # it just means that we render the highlight into the invisible range on the right
+                end_char = start_char + length_in_bytes
+
+            start_column = line.char_to_column(start_char)
+            end_column = line.char_to_column(end_char)
+            if end_column >= 0:
+                length_in_columns = end_column - start_column
+            else:
+                length_in_columns = 4096
+
+            return [HighlightedRange(start_column, length_in_columns, brush=QBrush(QColor(156, 215, 255, 192)),
+                                     pen=Qt.PenStyle.NoPen)]
+        else:
+            return None