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add BufferPane::scroll_window_up() and scroll_window_down()

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This commit is contained in:
Josh Holtrop 2017-01-01 23:50:24 -05:00
parent 92d9597f2e
commit 94eb9276d9
2 changed files with 26 additions and 0 deletions
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24
src/gui/BufferPane.cc
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@ -608,6 +608,30 @@ void BufferPane::enter_insert_mode(Window::EnterInsertModeMode which)
m_window->request_redraw();
}
void BufferPane::scroll_window_up()
{
const int lines_to_scroll = 3;
int so = effective_scroll_offset();
int lines_to_move_cursor = (so + lines_to_scroll) - (m_rows - m_cursor_screen_row - 1);
while (lines_to_move_cursor-- > 0)
{
move_cursor_screen_row_up();
}
m_cursor_screen_row += lines_to_scroll;
}
void BufferPane::scroll_window_down()
{
const int lines_to_scroll = 3;
int so = effective_scroll_offset();
int lines_to_move_cursor = (so + lines_to_scroll) - m_cursor_screen_row;
while (lines_to_move_cursor-- > 0)
{
move_cursor_screen_row_down();
}
m_cursor_screen_row -= lines_to_scroll;
}
void BufferPane::forward_to_column(int column, bool allow_eol)
{
Buffer::Iterator start_of_line = *m_iterator;

2
src/gui/BufferPane.h
View File

@ -21,6 +21,8 @@ public:
void kill_character_at_cursor();
void write_file();
bool insert_mode() const { return m_buffer->insert_mode(); }
void scroll_window_up();
void scroll_window_down();
protected:
int effective_scroll_offset()