/*
* Make sure curwin->w_cursor.lnum is valid.
*/
void check_cursor_lnum(void)
{
if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count) {
/* If there is a closed fold at the end of the file, put the cursor in
* its first line. Otherwise in the last line. */
if (!hasFolding(curbuf->b_ml.ml_line_count,
&curwin->w_cursor.lnum, NULL))
curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
}
if (curwin->w_cursor.lnum <= 0)
curwin->w_cursor.lnum = 1;
}
// Move the cursor to the specified row and column on the screen.
// Change current window if necessary. Returns an integer with the
// CURSOR_MOVED bit set if the cursor has moved or unset otherwise.
//
// The MOUSE_FOLD_CLOSE bit is set when clicked on the '-' in a fold column.
// The MOUSE_FOLD_OPEN bit is set when clicked on the '+' in a fold column.
//
// If flags has MOUSE_FOCUS, then the current window will not be changed, and
// if the mouse is outside the window then the text will scroll, or if the
// mouse was previously on a status line, then the status line may be dragged.
//
// If flags has MOUSE_MAY_VIS, then VIsual mode will be started before the
// cursor is moved unless the cursor was on a status line.
// This function returns one of IN_UNKNOWN, IN_BUFFER, IN_STATUS_LINE or
// IN_SEP_LINE depending on where the cursor was clicked.
//
// If flags has MOUSE_MAY_STOP_VIS, then Visual mode will be stopped, unless
// the mouse is on the status line of the same window.
//
// If flags has MOUSE_DID_MOVE, nothing is done if the mouse didn't move since
// the last call.
//
// If flags has MOUSE_SETPOS, nothing is done, only the current position is
// remembered.
int jump_to_mouse(int flags,
bool *inclusive, // used for inclusive operator, can be NULL
int which_button) // MOUSE_LEFT, MOUSE_RIGHT, MOUSE_MIDDLE
{
static int on_status_line = 0; // #lines below bottom of window
static int on_sep_line = 0; // on separator right of window
static int prev_row = -1;
static int prev_col = -1;
static win_T *dragwin = NULL; // window being dragged
static int did_drag = false; // drag was noticed
win_T *wp, *old_curwin;
pos_T old_cursor;
int count;
bool first;
int row = mouse_row;
int col = mouse_col;
int mouse_char;
mouse_past_bottom = false;
mouse_past_eol = false;
if (flags & MOUSE_RELEASED) {
// On button release we may change window focus if positioned on a
// status line and no dragging happened.
if (dragwin != NULL && !did_drag)
flags &= ~(MOUSE_FOCUS | MOUSE_DID_MOVE);
dragwin = NULL;
did_drag = false;
}
if ((flags & MOUSE_DID_MOVE)
&& prev_row == mouse_row
&& prev_col == mouse_col) {
retnomove:
// before moving the cursor for a left click which is NOT in a status
// line, stop Visual mode
if (on_status_line)
return IN_STATUS_LINE;
if (on_sep_line)
return IN_SEP_LINE;
if (flags & MOUSE_MAY_STOP_VIS) {
end_visual_mode();
redraw_curbuf_later(INVERTED); // delete the inversion
}
return IN_BUFFER;
}
prev_row = mouse_row;
prev_col = mouse_col;
if (flags & MOUSE_SETPOS)
goto retnomove; // ugly goto...
// Remember the character under the mouse, it might be a '-' or '+' in the
// fold column.
if (row >= 0 && row < Rows && col >= 0 && col <= Columns
&& ScreenLines != NULL)
mouse_char = ScreenLines[LineOffset[row] + (unsigned)col];
else
mouse_char = ' ';
old_curwin = curwin;
old_cursor = curwin->w_cursor;
if (!(flags & MOUSE_FOCUS)) {
if (row < 0 || col < 0) // check if it makes sense
return IN_UNKNOWN;
// find the window where the row is in
wp = mouse_find_win(&row, &col);
dragwin = NULL;
// winpos and height may change in win_enter()!
if (row >= wp->w_height) { // In (or below) status line
on_status_line = row - wp->w_height + 1;
dragwin = wp;
} else {
on_status_line = 0;
}
if (col >= wp->w_width) { // In separator line
on_sep_line = col - wp->w_width + 1;
dragwin = wp;
} else {
on_sep_line = 0;
}
// The rightmost character of the status line might be a vertical
// separator character if there is no connecting window to the right.
if (on_status_line && on_sep_line) {
if (stl_connected(wp))
on_sep_line = 0;
else
on_status_line = 0;
}
// Before jumping to another buffer, or moving the cursor for a left
// click, stop Visual mode.
if (VIsual_active
&& (wp->w_buffer != curwin->w_buffer
|| (!on_status_line
&& !on_sep_line
&& (
wp->w_p_rl ? col < wp->w_width - wp->w_p_fdc :
col >= wp->w_p_fdc
+ (cmdwin_type == 0 && wp ==
curwin ? 0 : 1)
)
&& (flags & MOUSE_MAY_STOP_VIS)))) {
end_visual_mode();
redraw_curbuf_later(INVERTED); // delete the inversion
}
if (cmdwin_type != 0 && wp != curwin) {
// A click outside the command-line window: Use modeless
// selection if possible. Allow dragging the status lines.
on_sep_line = 0;
row = 0;
col += wp->w_wincol;
wp = curwin;
}
// Only change window focus when not clicking on or dragging the
// status line. Do change focus when releasing the mouse button
// (MOUSE_FOCUS was set above if we dragged first).
if (dragwin == NULL || (flags & MOUSE_RELEASED))
win_enter(wp, true); // can make wp invalid!
// set topline, to be able to check for double click ourselves
if (curwin != old_curwin)
set_mouse_topline(curwin);
if (on_status_line) { // In (or below) status line
// Don't use start_arrow() if we're in the same window
if (curwin == old_curwin)
return IN_STATUS_LINE;
else
return IN_STATUS_LINE | CURSOR_MOVED;
}
if (on_sep_line) { // In (or below) status line
// Don't use start_arrow() if we're in the same window
if (curwin == old_curwin)
return IN_SEP_LINE;
else
return IN_SEP_LINE | CURSOR_MOVED;
}
curwin->w_cursor.lnum = curwin->w_topline;
} else if (on_status_line && which_button == MOUSE_LEFT) {
if (dragwin != NULL) {
// Drag the status line
count = row - dragwin->w_winrow - dragwin->w_height + 1
- on_status_line;
win_drag_status_line(dragwin, count);
did_drag |= count;
}
return IN_STATUS_LINE; // Cursor didn't move
} else if (on_sep_line && which_button == MOUSE_LEFT) {
if (dragwin != NULL) {
// Drag the separator column
count = col - dragwin->w_wincol - dragwin->w_width + 1
- on_sep_line;
win_drag_vsep_line(dragwin, count);
did_drag |= count;
}
return IN_SEP_LINE; // Cursor didn't move
} else {
// keep_window_focus must be true
// before moving the cursor for a left click, stop Visual mode
if (flags & MOUSE_MAY_STOP_VIS) {
end_visual_mode();
redraw_curbuf_later(INVERTED); // delete the inversion
}
row -= curwin->w_winrow;
col -= curwin->w_wincol;
// When clicking beyond the end of the window, scroll the screen.
// Scroll by however many rows outside the window we are.
if (row < 0) {
count = 0;
for (first = true; curwin->w_topline > 1; ) {
if (curwin->w_topfill < diff_check(curwin, curwin->w_topline))
++count;
else
count += plines(curwin->w_topline - 1);
if (!first && count > -row)
break;
first = false;
(void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
if (curwin->w_topfill < diff_check(curwin, curwin->w_topline)) {
++curwin->w_topfill;
} else {
--curwin->w_topline;
curwin->w_topfill = 0;
}
}
check_topfill(curwin, false);
curwin->w_valid &=
~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
redraw_later(VALID);
row = 0;
} else if (row >= curwin->w_height) {
count = 0;
for (first = true; curwin->w_topline < curbuf->b_ml.ml_line_count; ) {
if (curwin->w_topfill > 0) {
++count;
} else {
count += plines(curwin->w_topline);
}
if (!first && count > row - curwin->w_height + 1) {
break;
}
first = false;
if (hasFolding(curwin->w_topline, NULL, &curwin->w_topline)
&& curwin->w_topline == curbuf->b_ml.ml_line_count) {
break;
}
if (curwin->w_topfill > 0) {
--curwin->w_topfill;
} else {
++curwin->w_topline;
curwin->w_topfill =
diff_check_fill(curwin, curwin->w_topline);
}
}
check_topfill(curwin, false);
redraw_later(VALID);
curwin->w_valid &=
~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
row = curwin->w_height - 1;
} else if (row == 0) {
// When dragging the mouse, while the text has been scrolled up as
// far as it goes, moving the mouse in the top line should scroll
// the text down (done later when recomputing w_topline).
if (mouse_dragging > 0
&& curwin->w_cursor.lnum
== curwin->w_buffer->b_ml.ml_line_count
&& curwin->w_cursor.lnum == curwin->w_topline) {
curwin->w_valid &= ~(VALID_TOPLINE);
}
}
}
// Check for position outside of the fold column.
if (curwin->w_p_rl ? col < curwin->w_width - curwin->w_p_fdc :
col >= curwin->w_p_fdc + (cmdwin_type == 0 ? 0 : 1)) {
mouse_char = ' ';
}
// compute the position in the buffer line from the posn on the screen
if (mouse_comp_pos(curwin, &row, &col, &curwin->w_cursor.lnum)) {
mouse_past_bottom = true;
}
if (!(flags & MOUSE_RELEASED) && which_button == MOUSE_LEFT) {
col = mouse_adjust_click(curwin, row, col);
}
// Start Visual mode before coladvance(), for when 'sel' != "old"
if ((flags & MOUSE_MAY_VIS) && !VIsual_active) {
check_visual_highlight();
VIsual = old_cursor;
VIsual_active = true;
VIsual_reselect = true;
// if 'selectmode' contains "mouse", start Select mode
may_start_select('o');
setmouse();
if (p_smd && msg_silent == 0) {
redraw_cmdline = true; // show visual mode later
}
}
curwin->w_curswant = col;
curwin->w_set_curswant = false; // May still have been true
if (coladvance(col) == FAIL) { // Mouse click beyond end of line
if (inclusive != NULL) {
*inclusive = true;
}
mouse_past_eol = true;
} else if (inclusive != NULL) {
*inclusive = false;
}
count = IN_BUFFER;
if (curwin != old_curwin || curwin->w_cursor.lnum != old_cursor.lnum
|| curwin->w_cursor.col != old_cursor.col) {
count |= CURSOR_MOVED; // Cursor has moved
}
if (mouse_char == '+') {
count |= MOUSE_FOLD_OPEN;
} else if (mouse_char != ' ') {
count |= MOUSE_FOLD_CLOSE;
}
return count;
}
