--- /dev/null
+/* 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.
+ */
+
+/*
+ * popupmenu.c: Popup menu (PUM)
+ */
+#include "vim.h"
+
+#if defined(FEAT_INS_EXPAND) || defined(PROTO)
+
+static char_u **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_scrollbar; /* TRUE when scrollbar present */
+
+static int pum_row; /* top row of pum */
+static int pum_col; /* left column of pum */
+
+#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, row, height, col)
+ char_u **array;
+ int size;
+ int selected; /* index of initially selected item */
+ int row;
+ int height;
+ int col;
+{
+ int w;
+ int def_width = PUM_DEF_WIDTH;
+ int max_width = 0;
+ int i;
+
+ /*
+ * Figure out the size and position of the pum.
+ */
+ if (size < PUM_DEF_HEIGHT)
+ pum_height = size;
+ else
+ pum_height = PUM_DEF_HEIGHT;
+
+ /* Put the pum below "row" if possible. If there are few lines decide on
+ * where there is more room. */
+ if (row >= cmdline_row - pum_height && row > (cmdline_row - height) / 2)
+ {
+ /* pum above "row" */
+ if (row >= size)
+ {
+ pum_row = row - size;
+ pum_height = size;
+ }
+ else
+ {
+ pum_row = 0;
+ pum_height = row;
+ }
+ }
+ else
+ {
+ /* pum below "row" */
+ pum_row = row + height;
+ if (size > cmdline_row - pum_row)
+ pum_height = cmdline_row - pum_row;
+ else
+ pum_height = size;
+ }
+
+ /* don't display when we only have room for one line */
+ if (pum_height <= 1)
+ return;
+
+ /* Compute the width of the widest match. */
+ for (i = 0; i < size; ++i)
+ {
+ w = vim_strsize(array[i]);
+ if (max_width < w)
+ max_width = w;
+ }
+
+ /* 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 > def_width)
+ pum_width = 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. */
+ pum_set_selected(selected);
+}
+
+/*
+ * 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;
+ int width, w;
+ int thumb_pos = 0;
+ int thumb_heigth = 1;
+
+ 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. */
+ col = pum_col;
+ width = 0;
+ s = NULL;
+ for (p = pum_array[idx]; ; mb_ptr_adv(p))
+ {
+ if (s == NULL)
+ s = p;
+ w = ptr2cells(p);
+ if (*p == NUL || *p == TAB || width + w > pum_width)
+ {
+ /* Display the text that fits or comes before a Tab. */
+ screen_puts_len(s, p - s, row, col, attr);
+ col += width;
+
+ if (*p != TAB)
+ break;
+
+ /* Display two spaces for a Tab. */
+ screen_puts_len((char_u *)" ", 2, row, col, attr);
+ col += 2;
+ s = NULL;
+ width = 0;
+ }
+ else
+ width += w;
+ }
+
+ 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.
+ */
+ void
+pum_set_selected(n)
+ int n;
+{
+ pum_selected = n;
+
+ if (pum_selected >= 0)
+ {
+ if (pum_first > pum_selected)
+ /* scroll down */
+ pum_first = pum_selected;
+ else if (pum_first < pum_selected - pum_height + 1)
+ /* scroll up */
+ pum_first = pum_selected - pum_height + 1;
+
+ if (pum_height > 6)
+ {
+ /* Give three lines of context when possible. */
+ if (pum_first > pum_selected - 3)
+ {
+ /* scroll down */
+ pum_first = pum_selected - 3;
+ if (pum_first < 0)
+ pum_first = 0;
+ }
+ else if (pum_first < pum_selected + 3 - pum_height + 1)
+ {
+ /* scroll up */
+ pum_first = pum_selected + 3 - pum_height + 1;
+ }
+ }
+ }
+
+ /* Never display more than we have */
+ if (pum_first > pum_size - pum_height)
+ pum_first = pum_size - pum_height;
+
+ pum_redraw();
+}
+
+/*
+ * Undisplay the popup menu (later).
+ */
+ void
+pum_undisplay()
+{
+ pum_array = NULL;
+ redraw_all_later(NOT_VALID);
+}
+
+/*
+ * 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.
+ */
+ int
+pum_visible()
+{
+ return pum_array != NULL;
+}
+
+#endif
projects / vim / commitdiff