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Add cursor movements to move to SOL and EOL.

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This commit is contained in:
Josh Holtrop 2016-09-07 22:31:24 -04:00
parent c2166b4bd1
commit f876b68bd0
4 changed files with 39 additions and 4 deletions
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15
src/core/PieceTable.cc
View File

@ -122,28 +122,39 @@ PieceTable::Cursor::Cursor(PieceTable * pt) : iterator(pt)
init_column();
}
void PieceTable::Cursor::go_start_of_line()
bool PieceTable::Cursor::go_start_of_line()
{
bool rv = false;
while (iterator.valid() &&
(!iterator.piece->prev->eol()) &&
(iterator.piece->prev != iterator.piece_table->start_piece))
{
iterator.go_prev_piece();
rv = true;
}
if (iterator.offset != 0u)
rv = true;
iterator.offset = 0u;
init_column();
return rv;
}
void PieceTable::Cursor::go_end_of_line()
bool PieceTable::Cursor::go_end_of_line()
{
bool rv = false;
while (iterator.valid() &&
(!iterator.piece->eol()) &&
(iterator.piece->next != iterator.piece_table->end_piece))
{
iterator.go_next_piece();
rv = true;
}
uint32_t current_column = column;
iterator.go_end_of_piece();
calculate_column();
if (column != current_column)
rv = true;
return rv;
}
bool PieceTable::Cursor::go_up(int n, uint32_t desired_column)

4
src/core/PieceTable.h
View File

@ -110,8 +110,8 @@ public:
Cursor(PieceTable * pt);
void go_start_of_line();
void go_end_of_line();
bool go_start_of_line();
bool go_end_of_line();
bool go_up(int n, uint32_t desired_column);
bool go_down(int n, uint32_t desired_column);
bool go_left(int n);

22
src/gui/Window.cc
View File

@ -234,6 +234,12 @@ void Window::handle_key(uint32_t scancode, uint32_t mod)
case SDL_SCANCODE_ESCAPE:
m_exit_requested = true;
break;
case SDL_SCANCODE_0:
cursor_move(CURSOR_SOL);
break;
case SDL_SCANCODE_9:
cursor_move(CURSOR_EOL);
break;
case SDL_SCANCODE_H:
cursor_move(CURSOR_LEFT);
break;
@ -269,6 +275,12 @@ void Window::cursor_move(int which)
case CURSOR_DOWN:
success = m_cursor->go_down(1, m_cursor->column);
break;
case CURSOR_SOL:
success = m_cursor->go_start_of_line();
break;
case CURSOR_EOL:
success = m_cursor->go_end_of_line();
break;
}
if (success)
{
@ -293,6 +305,16 @@ void Window::cursor_move(int which)
row_offset = c.column / m_columns - current_row_offset + 1 + m_cursor->column / m_columns;
}
break;
case CURSOR_SOL:
row_offset = -current_row_offset;
break;
case CURSOR_EOL:
{
PieceTable::Cursor c = *m_cursor;
c.go_end_of_line();
row_offset = c.column / m_columns - current_row_offset;
}
break;
}
update_cursor_row(m_cursor_row + row_offset);
redraw();

2
src/gui/Window.h
View File

@ -22,6 +22,8 @@ protected:
CURSOR_RIGHT,
CURSOR_UP,
CURSOR_DOWN,
CURSOR_SOL,
CURSOR_EOL,
};
void resize();