patch 8.1.1525: cannot move a popup window with the mouse
Problem: Cannot move a popup window with the mouse.
Solution: Add the "drag" property and make it possible to drag a popup
window by its border.
diff --git a/src/popupwin.c b/src/popupwin.c
index 5e444ae..f773958 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -164,6 +164,68 @@
}
}
+/*
+ * Return TRUE if "row"/"col" is on the border of the popup.
+ * The values are relative to the top-left corner.
+ */
+ int
+popup_on_border(win_T *wp, int row, int col)
+{
+ return (row == 0 && wp->w_popup_border[0] > 0)
+ || (row == popup_height(wp) - 1 && wp->w_popup_border[2] > 0)
+ || (col == 0 && wp->w_popup_border[3] > 0)
+ || (col == popup_width(wp) - 1 && wp->w_popup_border[1] > 0);
+}
+
+// Values set when dragging a popup window starts.
+static int drag_start_row;
+static int drag_start_col;
+static int drag_start_wantline;
+static int drag_start_wantcol;
+
+/*
+ * Mouse down on border of popup window: start dragging it.
+ * Uses mouse_col and mouse_row.
+ */
+ void
+popup_start_drag(win_T *wp)
+{
+ drag_start_row = mouse_row;
+ drag_start_col = mouse_col;
+ // TODO: handle using different corner
+ if (wp->w_wantline == 0)
+ drag_start_wantline = wp->w_winrow + 1;
+ else
+ drag_start_wantline = wp->w_wantline;
+ if (wp->w_wantcol == 0)
+ drag_start_wantcol = wp->w_wincol + 1;
+ else
+ drag_start_wantcol = wp->w_wantcol;
+}
+
+/*
+ * Mouse moved while dragging a popup window: adjust the window popup position.
+ */
+ void
+popup_drag(win_T *wp)
+{
+ // The popup may be closed before dragging stops.
+ if (!win_valid_popup(wp))
+ return;
+
+ wp->w_wantline = drag_start_wantline + (mouse_row - drag_start_row);
+ if (wp->w_wantline < 1)
+ wp->w_wantline = 1;
+ if (wp->w_wantline > Rows)
+ wp->w_wantline = Rows;
+ wp->w_wantcol = drag_start_wantcol + (mouse_col - drag_start_col);
+ if (wp->w_wantcol < 1)
+ wp->w_wantcol = 1;
+ if (wp->w_wantcol > Columns)
+ wp->w_wantcol = Columns;
+
+ popup_adjust_position(wp);
+}
#if defined(FEAT_TIMERS)
static void
@@ -237,6 +299,8 @@
wp->w_p_wrap = nr != 0;
}
+ wp->w_popup_drag = dict_get_number(dict, (char_u *)"drag");
+
di = dict_find(dict, (char_u *)"callback", -1);
if (di != NULL)
{
@@ -798,6 +862,7 @@
wp->w_popup_padding[3] = 1;
set_string_option_direct_in_win(wp, (char_u *)"wincolor", -1,
(char_u *)"WarningMsg", OPT_FREE|OPT_LOCAL, 0);
+ wp->w_popup_drag = 1;
}
// Deal with options.