File indexing completed on 2024-04-21 03:57:18

 /*
     SPDX-FileCopyrightText: 2010 Christoph Cullmann <cullmann@kde.org>
 
     Based on code of the SmartCursor/Range by:
     SPDX-FileCopyrightText: 2003-2005 Hamish Rodda <rodda@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "katetextcursor.h"
 #include "katedocument.h"
 #include "katetextblock.h"
 #include "katetextbuffer.h"
 #include "katetextrange.h"
 
 namespace Kate
 {
 TextCursor::TextCursor(TextBuffer &buffer, const KTextEditor::Cursor position, InsertBehavior insertBehavior)
     : m_buffer(buffer)
     , m_moveOnInsert(insertBehavior == MoveOnInsert)
 {
     // init position
     setPosition(position, true);
 }
 
 TextCursor::TextCursor(TextBuffer &buffer, TextRange *range, KTextEditor::Cursor position, InsertBehavior insertBehavior)
     : m_buffer(buffer)
     , m_range(range)
     , m_moveOnInsert(insertBehavior == MoveOnInsert)
 {
     // init position
     setPosition(position, true);
 }
 
 TextCursor::~TextCursor()
 {
     // remove cursor from block or buffer
     if (m_block) {
         m_block->removeCursor(this);
     }
 
     // only cursors without range are here!
     else if (!m_range) {
         m_buffer.m_invalidCursors.remove(this);
     }
 }
 
 void TextCursor::setPosition(const TextCursor &position)
 {
     if (m_block && m_block != position.m_block) {
         m_block->removeCursor(this);
     }
 
     m_line = position.m_line;
     m_column = position.m_column;
 
     m_block = position.m_block;
     if (m_block) {
         m_block->insertCursor(this);
     }
 }
 
 void TextCursor::setPosition(KTextEditor::Cursor position, bool init)
 {
     // any change or init? else do nothing
     if (!init && position.line() == line()) {
         // simple case: 1:1 equal
         if (position.column() == m_column) {
             return;
         }
 
         // ok, too: both old and new column are valid, we can just adjust the column and be done
         if (position.column() >= 0 && m_column >= 0) {
             m_column = position.column();
             return;
         }
 
         // else: we need to handle the change in a more complex way, new or old column are not valid!
     }
 
     // first: validate the line and column, else invalid
     if (!position.isValid() || position.line() >= m_buffer.lines()) {
         if (!m_range) {
             m_buffer.m_invalidCursors.insert(this);
         }
         if (m_block) {
             m_block->removeCursor(this);
         }
         m_block = nullptr;
         m_line = m_column = -1;
         return;
     }
 
     // find new block if m_block doesn't contain the line or if the block is null
     TextBlock *oldBlock = m_block;
     int startLine = oldBlock ? oldBlock->startLine() : -1;
     if (!oldBlock || position.line() < startLine || position.line() >= startLine + oldBlock->lines()) {
         if (oldBlock) {
             oldBlock->removeCursor(this);
         }
         m_block = m_buffer.m_blocks[m_buffer.blockForLine(position.line())];
         Q_ASSERT(m_block);
         m_block->insertCursor(this);
         startLine = m_block->startLine();
     }
 
     // if cursor was invalid before, remove it from invalid cursor list
     if (!m_range && !oldBlock && !init) {
         Q_ASSERT(m_buffer.m_invalidCursors.contains(this));
         m_buffer.m_invalidCursors.remove(this);
     }
 
     // else: valid cursor
     m_line = position.line() - startLine;
     m_column = position.column();
 }
 
 KTextEditor::Document *Kate::TextCursor::document() const
 {
     return m_buffer.document();
 }
 
 KTextEditor::MovingRange *Kate::TextCursor::range() const
 {
     return m_range;
 }
 
 void Kate::TextCursor::setPosition(KTextEditor::Cursor position)
 {
     setPosition(position, false);
 }
 
 void Kate::TextCursor::setPosition(int line, int column)
 {
     setPosition(KTextEditor::Cursor(line, column), false);
 }
 }