diff options
Diffstat (limited to 'view.h')
| -rw-r--r-- | view.h | 104 |
1 files changed, 69 insertions, 35 deletions
@@ -8,6 +8,8 @@ #include "syntax.h" typedef struct View View; +typedef struct Cursor Cursor; +typedef struct Selection Selection; typedef struct { void *data; @@ -24,7 +26,8 @@ typedef struct { the same as in the underlying text, for example tabs get expanded */ unsigned int attr; bool istab; - bool selected; + bool selected; /* whether this cell is part of a selected region */ + bool cursor; /* whether a cursor is currently locaated on the cell */ } Cell; typedef struct Line Line; @@ -55,13 +58,13 @@ void view_tabwidth_set(View*, int tabwidth); /* cursor movements which also update selection if one is active. * they return new cursor postion */ -size_t view_line_down(View*); -size_t view_line_up(View*); -size_t view_screenline_down(View*); -size_t view_screenline_up(View*); -size_t view_screenline_begin(View*); -size_t view_screenline_middle(View*); -size_t view_screenline_end(View*); +size_t view_line_down(Cursor*); +size_t view_line_up(Cursor*); +size_t view_screenline_down(Cursor*); +size_t view_screenline_up(Cursor*); +size_t view_screenline_begin(Cursor*); +size_t view_screenline_middle(Cursor*); +size_t view_screenline_end(Cursor*); /* move window content up/down, but keep cursor position unchanged unless it is * on a now invisible line in which case we try to preserve the column position */ size_t view_slide_up(View*, int lines); @@ -73,38 +76,11 @@ size_t view_scroll_down(View*, int lines); /* place the cursor at the start ot the n-th window line, counting from 1 */ size_t view_screenline_goto(View*, int n); -/* get cursor position in bytes from start of the file */ -size_t view_cursor_get(View*); - -typedef struct { - int x, y; -} ViewPos; - -ViewPos view_cursor_viewpos(View*); - const Line *view_lines_get(View*); -/* get cursor position in terms of screen coordinates */ -CursorPos view_cursor_getpos(View*); -/* moves window viewport in direction until pos is visible. should only be - * used for short distances between current cursor position and destination */ -void view_scroll_to(View*, size_t pos); -/* move cursor to a given position. changes the viewport to make sure that - * position is visible. if the position is in the middle of a line, try to - * adjust the viewport in such a way that the whole line is displayed */ -void view_cursor_to(View*, size_t pos); /* redraw current cursor line at top/center/bottom of window */ void view_redraw_top(View*); void view_redraw_center(View*); void view_redraw_bottom(View*); -/* start selected area at current cursor position. further cursor movements will - * affect the selected region. */ -void view_selection_start(View*); -/* returns the currently selected text region, is either empty or well defined, - * i.e. sel.start <= sel.end */ -Filerange view_selection_get(View*); -void view_selection_set(View*, Filerange *sel); -/* clear selection and redraw window */ -void view_selection_clear(View*); /* get the currently displayed area in bytes from the start of the file */ Filerange view_viewport_get(View*); /* move visible viewport n-lines up/down, redraws the view but does not change @@ -119,4 +95,62 @@ Syntax *view_syntax_get(View*); void view_symbols_set(View*, int flags); int view_symbols_get(View*); +/* A view can manage multiple cursors, one of which (the main cursor) is always + * placed within the visible viewport. All functions named view_cursor_* operate + * on this cursor. Additional cursor can be created and manipulated using the + * functions named view_cursors_* */ + +/* get main cursor position in terms of screen coordinates */ +CursorPos view_cursor_getpos(View*); +/* get main cursor position in bytes from start of the file */ +size_t view_cursor_get(View*); +/* moves window viewport in direction until pos is visible. should only be + * used for short distances between current cursor position and destination */ +void view_scroll_to(View*, size_t pos); +/* move cursor to a given position. changes the viewport to make sure that + * position is visible. if the position is in the middle of a line, try to + * adjust the viewport in such a way that the whole line is displayed */ +void view_cursor_to(View*, size_t pos); +/* create a new cursor */ +Cursor *view_cursors_new(View*); +/* dispose an existing cursor */ +void view_cursors_free(Cursor*); +/* only keep the main cursor, release all others together with their + * selections (if any) */ +void view_cursors_clear(View*); +/* get the main cursor which is always in the visible viewport */ +Cursor *view_cursor(View*); +/* get the first cursor */ +Cursor *view_cursors(View*); +Cursor *view_cursors_prev(Cursor*); +Cursor *view_cursors_next(Cursor*); +/* get current position of cursor in bytes from the start of the file */ +size_t view_cursors_pos(Cursor*); +/* place cursor at `pos' which should be in the interval [0, text-size] */ +void view_cursors_to(Cursor*, size_t pos); +void view_cursors_scroll_to(Cursor*, size_t pos); +/* start selected area at current cursor position. further cursor movements + * will affect the selected region. */ +void view_cursors_selection_start(Cursor*); +/* detach cursor from selection, further cursor movements will not affect + * the selected region. */ +void view_cursors_selection_stop(Cursor*); +/* clear selection associated with this cursor (if any) */ +void view_cursors_selection_clear(Cursor*); +/* move cursor position from one end of the selection to the other */ +void view_cursors_selection_swap(Cursor*); +/* get/set the selected region associated with this cursor */ +Filerange view_cursors_selection_get(Cursor*); +void view_cursors_selection_set(Cursor*, Filerange*); + +Selection *view_selections_new(View*); +void view_selections_free(Selection*); +void view_selections_clear(View*); +void view_selections_swap(Selection*); +Selection *view_selections(View*); +Selection *view_selections_prev(Selection*); +Selection *view_selections_next(Selection*); +Filerange view_selections_get(Selection*); +void view_selections_set(Selection*, Filerange*); + #endif |