ref: 920685146057a91a66a5c00ecd6362edf5f9b3fc
dir: /popupmnu.c/
/* vi:set ts=8 sts=4 sw=4: * * VIM - Vi IMproved by Bram Moolenaar * * Do ":help uganda" in Vim to read copying and usage conditions. * Do ":help credits" in Vim to see a list of people who contributed. * See README.txt for an overview of the Vim source code. */ /* * popupmnu.c: Popup menu (PUM) */ #include "vim.h" #if defined(FEAT_INS_EXPAND) || defined(PROTO) static pumitem_T *pum_array = NULL; /* items of displayed pum */ static int pum_size; /* nr of items in "pum_array" */ static int pum_selected; /* index of selected item or -1 */ static int pum_first = 0; /* index of top item */ static int pum_height; /* nr of displayed pum items */ static int pum_width; /* width of displayed pum items */ static int pum_base_width; /* width of pum items base */ static int pum_kind_width; /* width of pum items kind column */ static int pum_scrollbar; /* TRUE when scrollbar present */ static int pum_row; /* top row of pum */ static int pum_col; /* left column of pum */ static int pum_do_redraw = FALSE; /* do redraw anyway */ static int pum_set_selected __ARGS((int n, int repeat)); #define PUM_DEF_HEIGHT 10 #define PUM_DEF_WIDTH 15 /* * Show the popup menu with items "array[size]". * "array" must remain valid until pum_undisplay() is called! * When possible the leftmost character is aligned with screen column "col". * The menu appears above the screen line "row" or at "row" + "height" - 1. */ void pum_display(array, size, selected) pumitem_T *array; int size; int selected; /* index of initially selected item, none if out of range */ { int w; int def_width; int max_width; int kind_width; int extra_width; int i; int top_clear; int row; int height; int col; int above_row = cmdline_row; int redo_count = 0; redo: def_width = PUM_DEF_WIDTH; max_width = 0; kind_width = 0; extra_width = 0; /* Pretend the pum is already there to avoid that must_redraw is set when * 'cuc' is on. */ pum_array = (pumitem_T *)1; validate_cursor_col(); pum_array = NULL; row = curwin->w_cline_row + W_WINROW(curwin); height = curwin->w_cline_height; col = curwin->w_wcol + W_WINCOL(curwin) - curwin->w_leftcol; if (firstwin->w_p_pvw) top_clear = firstwin->w_height; else top_clear = 0; /* When the preview window is at the bottom stop just above it. Also * avoid drawing over the status line so that it's clear there is a window * boundary. */ if (lastwin->w_p_pvw) above_row -= lastwin->w_height + lastwin->w_status_height + 1; /* * Figure out the size and position of the pum. */ if (size < PUM_DEF_HEIGHT) pum_height = size; else pum_height = PUM_DEF_HEIGHT; if (p_ph > 0 && pum_height > p_ph) pum_height = p_ph; /* Put the pum below "row" if possible. If there are few lines decide on * where there is more room. */ if (row >= above_row - pum_height && row > (above_row - top_clear - height) / 2) { /* pum above "row" */ if (row >= size) { pum_row = row - size; pum_height = size; } else { pum_row = 0; pum_height = row; } if (p_ph > 0 && pum_height > p_ph) { pum_row += pum_height - p_ph; pum_height = p_ph; } } else { /* pum below "row" */ pum_row = row + height; if (size > above_row - pum_row) pum_height = above_row - pum_row; else pum_height = size; if (p_ph > 0 && pum_height > p_ph) pum_height = p_ph; } /* don't display when we only have room for one line */ if (pum_height < 1 || (pum_height == 1 && size > 1)) return; /* If there is a preview window at the top avoid drawing over it. */ if (firstwin->w_p_pvw && pum_row < firstwin->w_height && pum_height > firstwin->w_height + 4) { pum_row += firstwin->w_height; pum_height -= firstwin->w_height; } /* Compute the width of the widest match and the widest extra. */ for (i = 0; i < size; ++i) { w = vim_strsize(array[i].pum_text); if (max_width < w) max_width = w; if (array[i].pum_kind != NULL) { w = vim_strsize(array[i].pum_kind) + 1; if (kind_width < w) kind_width = w; } if (array[i].pum_extra != NULL) { w = vim_strsize(array[i].pum_extra) + 1; if (extra_width < w) extra_width = w; } } pum_base_width = max_width; pum_kind_width = kind_width; /* if there are more items than room we need a scrollbar */ if (pum_height < size) { pum_scrollbar = 1; ++max_width; } else pum_scrollbar = 0; if (def_width < max_width) def_width = max_width; if (col < Columns - PUM_DEF_WIDTH || col < Columns - max_width) { /* align pum column with "col" */ pum_col = col; pum_width = Columns - pum_col - pum_scrollbar; if (pum_width > max_width + kind_width + extra_width + 1 && pum_width > PUM_DEF_WIDTH) { pum_width = max_width + kind_width + extra_width + 1; if (pum_width < PUM_DEF_WIDTH) pum_width = PUM_DEF_WIDTH; } } else if (Columns < def_width) { /* not enough room, will use what we have */ pum_col = 0; pum_width = Columns - 1; } else { if (max_width > PUM_DEF_WIDTH) max_width = PUM_DEF_WIDTH; /* truncate */ pum_col = Columns - max_width; pum_width = max_width - pum_scrollbar; } pum_array = array; pum_size = size; /* Set selected item and redraw. If the window size changed need to redo * the positioning. Limit this to two times, when there is not much * room the window size will keep changing. */ if (pum_set_selected(selected, redo_count) && ++redo_count <= 2) goto redo; } /* * Redraw the popup menu, using "pum_first" and "pum_selected". */ void pum_redraw() { int row = pum_row; int col; int attr_norm = highlight_attr[HLF_PNI]; int attr_select = highlight_attr[HLF_PSI]; int attr_scroll = highlight_attr[HLF_PSB]; int attr_thumb = highlight_attr[HLF_PST]; int attr; int i; int idx; char_u *s; char_u *p = NULL; int totwidth, width, w; int thumb_pos = 0; int thumb_heigth = 1; int round; int n; if (pum_scrollbar) { thumb_heigth = pum_height * pum_height / pum_size; if (thumb_heigth == 0) thumb_heigth = 1; thumb_pos = (pum_first * (pum_height - thumb_heigth) + (pum_size - pum_height) / 2) / (pum_size - pum_height); } for (i = 0; i < pum_height; ++i) { idx = i + pum_first; attr = (idx == pum_selected) ? attr_select : attr_norm; /* prepend a space if there is room */ if (pum_col > 0) screen_putchar(' ', row, pum_col - 1, attr); /* Display each entry, use two spaces for a Tab. * Do this 3 times: For the main text, kind and extra info */ col = pum_col; totwidth = 0; for (round = 1; round <= 3; ++round) { width = 0; s = NULL; switch (round) { case 1: p = pum_array[idx].pum_text; break; case 2: p = pum_array[idx].pum_kind; break; case 3: p = pum_array[idx].pum_extra; break; } if (p != NULL) for ( ; ; mb_ptr_adv(p)) { if (s == NULL) s = p; w = ptr2cells(p); if (*p == NUL || *p == TAB || totwidth + w > pum_width) { /* Display the text that fits or comes before a Tab. * First convert it to printable characters. */ char_u *st; int saved = *p; *p = NUL; st = transstr(s); *p = saved; if (st != NULL) { screen_puts_len(st, (int)STRLEN(st), row, col, attr); vim_free(st); } col += width; if (*p != TAB) break; /* Display two spaces for a Tab. */ screen_puts_len((char_u *)" ", 2, row, col, attr); col += 2; totwidth += 2; s = NULL; /* start text at next char */ width = 0; } else width += w; } if (round > 1) n = pum_kind_width + 1; else n = 1; /* Stop when there is nothing more to display. */ if (round == 3 || (round == 2 && pum_array[idx].pum_extra == NULL) || (round == 1 && pum_array[idx].pum_kind == NULL && pum_array[idx].pum_extra == NULL) || pum_base_width + n >= pum_width) break; screen_fill(row, row + 1, col, pum_col + pum_base_width + n, ' ', ' ', attr); col = pum_col + pum_base_width + n; totwidth = pum_base_width + n; } screen_fill(row, row + 1, col, pum_col + pum_width, ' ', ' ', attr); if (pum_scrollbar > 0) screen_putchar(' ', row, pum_col + pum_width, i >= thumb_pos && i < thumb_pos + thumb_heigth ? attr_thumb : attr_scroll); ++row; } } #if 0 /* not used yet */ /* * Return the index of the currently selected item. */ int pum_get_selected() { return pum_selected; } #endif /* * Set the index of the currently selected item. The menu will scroll when * necessary. When "n" is out of range don't scroll. * This may be repeated when the preview window is used: * "repeat" == 0: open preview window normally * "repeat" == 1: open preview window but don't set the size * "repeat" == 2: don't open preview window * Returns TRUE when the window was resized and the location of the popup menu * must be recomputed. */ static int pum_set_selected(n, repeat) int n; int repeat; { int resized = FALSE; int context = pum_height / 2; pum_selected = n; if (pum_selected >= 0 && pum_selected < pum_size) { if (pum_first > pum_selected - 4) { /* scroll down; when we did a jump it's probably a PageUp then * scroll a whole page */ if (pum_first > pum_selected - 2) { pum_first -= pum_height - 2; if (pum_first < 0) pum_first = 0; else if (pum_first > pum_selected) pum_first = pum_selected; } else pum_first = pum_selected; } else if (pum_first < pum_selected - pum_height + 5) { /* scroll up; when we did a jump it's probably a PageDown then * scroll a whole page */ if (pum_first < pum_selected - pum_height + 1 + 2) { pum_first += pum_height - 2; if (pum_first < pum_selected - pum_height + 1) pum_first = pum_selected - pum_height + 1; } else pum_first = pum_selected - pum_height + 1; } /* Give a few lines of context when possible. */ if (context > 3) context = 3; if (pum_height > 2) { if (pum_first > pum_selected - context) { /* scroll down */ pum_first = pum_selected - context; if (pum_first < 0) pum_first = 0; } else if (pum_first < pum_selected + context - pum_height + 1) { /* scroll up */ pum_first = pum_selected + context - pum_height + 1; } } #if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX) /* * Show extra info in the preview window if there is something and * 'completeopt' contains "preview". * Skip this when tried twice already. * Skip this also when there is not much room. * NOTE: Be very careful not to sync undo! */ if (pum_array[pum_selected].pum_info != NULL && Rows > 10 && repeat <= 1 && vim_strchr(p_cot, 'p') != NULL) { win_T *curwin_save = curwin; int res = OK; /* Open a preview window. 3 lines by default. */ g_do_tagpreview = 3; resized = prepare_tagpreview(FALSE); g_do_tagpreview = 0; if (curwin->w_p_pvw) { if (curbuf->b_fname == NULL && curbuf->b_p_bt[0] == 'n' && curbuf->b_p_bt[2] == 'f' && curbuf->b_p_bh[0] == 'w') { /* Already a "wipeout" buffer, make it empty. */ while (!bufempty()) ml_delete((linenr_T)1, FALSE); } else { /* Don't want to sync undo in the current buffer. */ ++no_u_sync; res = do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, 0); --no_u_sync; if (res == OK) { /* Edit a new, empty buffer. Set options for a "wipeout" * buffer. */ set_option_value((char_u *)"swf", 0L, NULL, OPT_LOCAL); set_option_value((char_u *)"bt", 0L, (char_u *)"nofile", OPT_LOCAL); set_option_value((char_u *)"bh", 0L, (char_u *)"wipe", OPT_LOCAL); set_option_value((char_u *)"diff", 0L, (char_u *)"", OPT_LOCAL); } } if (res == OK) { char_u *p, *e; linenr_T lnum = 0; for (p = pum_array[pum_selected].pum_info; *p != NUL; ) { e = vim_strchr(p, '\n'); if (e == NULL) { ml_append(lnum++, p, 0, FALSE); break; } else { *e = NUL; ml_append(lnum++, p, (int)(e - p + 1), FALSE); *e = '\n'; p = e + 1; } } /* Increase the height of the preview window to show the * text, but no more than 'previewheight' lines. */ if (repeat == 0) { if (lnum > p_pvh) lnum = p_pvh; if (curwin->w_height < lnum) { win_setheight((int)lnum); resized = TRUE; } } curbuf->b_changed = 0; curbuf->b_p_ma = FALSE; curwin->w_cursor.lnum = 0; curwin->w_cursor.col = 0; if (curwin != curwin_save && win_valid(curwin_save)) { /* Return cursor to where we were */ validate_cursor(); redraw_later(SOME_VALID); /* When the preview window was resized we need to * update the view on the buffer. Only go back to * the window when needed, otherwise it will always be * redraw. */ if (resized) { win_enter(curwin_save, TRUE); update_topline(); } /* Update the screen before drawing the popup menu. * Enable updating the status lines. */ pum_do_redraw = TRUE; update_screen(0); pum_do_redraw = FALSE; if (!resized && win_valid(curwin_save)) win_enter(curwin_save, TRUE); /* May need to update the screen again when there are * autocommands involved. */ pum_do_redraw = TRUE; update_screen(0); pum_do_redraw = FALSE; } } } } #endif } /* Never display more than we have */ if (pum_first > pum_size - pum_height) pum_first = pum_size - pum_height; if (!resized) pum_redraw(); return resized; } /* * Undisplay the popup menu (later). */ void pum_undisplay() { pum_array = NULL; redraw_all_later(SOME_VALID); #ifdef FEAT_WINDOWS redraw_tabline = TRUE; #endif status_redraw_all(); } /* * Clear the popup menu. Currently only resets the offset to the first * displayed item. */ void pum_clear() { pum_first = 0; } /* * Return TRUE if the popup menu is displayed. * Overruled when "pum_do_redraw" is set, used to redraw the status lines. */ int pum_visible() { return !pum_do_redraw && pum_array != NULL; } /* * Return the height of the popup menu, the number of entries visible. * Only valid when pum_visible() returns TRUE! */ int pum_get_height() { return pum_height; } #endif