summaryrefslogtreecommitdiffstats
path: root/list_generic.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--list_generic.c486
1 files changed, 486 insertions, 0 deletions
diff --git a/list_generic.c b/list_generic.c
new file mode 100644
index 0000000..0cca907
--- /dev/null
+++ b/list_generic.c
@@ -0,0 +1,486 @@
+/* Copyright (c) 2010
+ * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
+ * Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (see the file COPYING); if not, see
+ * https://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
+ *
+ ****************************************************************
+ */
+
+#include "config.h"
+#include "screen.h"
+#include "list_generic.h"
+#include "layer.h"
+#include "extern.h"
+
+/* Deals with a generic list display */
+
+extern struct layer *flayer;
+
+static void ListProcess __P((char **, int *));
+static void ListAbort __P((void));
+static void ListRedisplayLine __P((int, int, int, int));
+static void ListClearLine __P((int, int, int, int));
+static int ListRewrite __P((int, int, int, struct mchar *, int));
+static int ListResize __P((int, int));
+static void ListRestore __P((void));
+static void ListFree __P((void *));
+
+struct LayFuncs ListLf =
+{
+ ListProcess,
+ ListAbort,
+ ListRedisplayLine,
+ ListClearLine,
+ ListRewrite,
+ ListResize,
+ ListRestore,
+ ListFree
+};
+
+/** Returns non-zero on success. */
+struct ListData *
+glist_display(struct GenericList *list, const char *name)
+{
+ struct ListData *ldata;
+
+ if (InitOverlayPage(sizeof(struct ListData), &ListLf, 0))
+ return NULL;
+ ldata = flayer->l_data;
+
+ ldata->name = name; /* We do not SaveStr, since the strings should be all static literals */
+ ldata->list_fn = list;
+
+ flayer->l_mode = 1;
+ flayer->l_x = 0;
+ flayer->l_y = flayer->l_height - 1;
+
+ return ldata;
+}
+
+static void
+glist_decide_top(struct ListData *ldata)
+{
+ int count = flayer->l_height - 5; /* 2 for header, 1 for footer */
+ struct ListRow *top = ldata->selected;
+ for (; count && top != ldata->root; top = top->prev, count--)
+ ;
+ ldata->top = top;
+}
+
+static struct ListRow *
+glist_search_dir(struct ListData *ldata, struct ListRow *start, int dir)
+{
+ struct ListRow *row = (dir == 1) ? start->next : start->prev;
+ for (; row; row = (dir == 1) ? row->next : row->prev)
+ if (ldata->list_fn->gl_matchrow(ldata, row, ldata->search))
+ return row;
+
+ if (dir == 1)
+ row = ldata->root;
+ else
+ {
+ /* First, go to the end */
+ if (!start->next)
+ row = start;
+ else
+ for (row = start->next; row->next; row = row->next)
+ ;
+ }
+
+ for (; row != start; row = (dir == 1) ? row->next : row->prev)
+ if (ldata->list_fn->gl_matchrow(ldata, row, ldata->search))
+ break;
+
+ return row;
+}
+
+static void
+glist_search(char *buf, int len, char *data)
+{
+ struct ListData *ldata = (struct ListData *)data;
+ struct ListRow *row;
+
+ if (ldata->search)
+ Free(ldata->search);
+ if (len > 0)
+ ldata->search = SaveStr(buf);
+ else
+ return;
+
+ for (row = ldata->selected; row; row = row->next)
+ if (ldata->list_fn->gl_matchrow(ldata, row, ldata->search))
+ break;
+
+ if (!row)
+ for (row = ldata->root; row != ldata->selected; row = row->next)
+ if (ldata->list_fn->gl_matchrow(ldata, row, ldata->search))
+ break;
+
+ if (row == ldata->selected)
+ return;
+
+ ldata->selected = row;
+ if (ldata->selected->y == -1)
+ glist_decide_top(ldata);
+ glist_display_all(ldata);
+}
+
+static void ListProcess(char **ppbuf, int *plen)
+{
+ struct ListData *ldata = flayer->l_data;
+ int count = 0;
+
+ while (*plen > 0)
+ {
+ struct ListRow *old;
+ unsigned char ch;
+
+ if (!flayer->l_mouseevent.start && ldata->list_fn->gl_pinput &&
+ ldata->list_fn->gl_pinput(ldata, ppbuf, plen))
+ continue;
+
+ ch = **ppbuf;
+ ++*ppbuf;
+ --*plen;
+
+ if (flayer->l_mouseevent.start)
+ {
+ int r = LayProcessMouse(flayer, ch);
+ if (r == -1)
+ {
+ LayProcessMouseSwitch(flayer, 0);
+ continue;
+ }
+ else
+ {
+ if (r)
+ ch = 0222;
+ else
+ continue;
+ }
+ }
+
+ if (!ldata->selected)
+ {
+ *plen = 0;
+ break;
+ }
+
+ old = ldata->selected;
+
+processchar:
+ switch (ch)
+ {
+ case ' ':
+ break;
+
+ case '\r':
+ case '\n':
+ break;
+
+ case 0220: /* up */
+ case 16: /* ^P */
+ case 'k':
+ if (!ldata->selected->prev) /* There's no where to go */
+ break;
+ ldata->selected = old->prev;
+ break;
+
+ case 0216: /* down */
+ case 14: /* ^N like emacs */
+ case 'j':
+ if (!ldata->selected->next) /* Nothing to do */
+ break;
+ ldata->selected = old->next;
+ break;
+
+ case 033: /* escape */
+ case 007: /* ^G */
+ ListAbort();
+ *plen = 0;
+ return;
+
+ case 0201: /* home */
+ case 0001: /* ^A */
+ ldata->selected = ldata->root;
+ break;
+
+ case 0205: /* end */
+ case 0005: /* ^E */
+ while (ldata->selected->next)
+ ldata->selected = ldata->selected->next;
+ if (ldata->selected->y != -1)
+ {
+ /* Both old and current selections are on the screen. So we can just
+ * redraw these two affected rows. */
+ }
+ break;
+
+ case 0004: /* ^D (half-page down) */
+ case 0006: /* page-down, ^F */
+ count = (flayer->l_height - 4) >> (ch == 0004);
+ for (; ldata->selected->next && --count;
+ ldata->selected = ldata->selected->next)
+ ;
+ break;
+
+ case 0025: /* ^U (half-page up) */
+ case 0002: /* page-up, ^B */
+ count = (flayer->l_height - 4) >> (ch == 0025);
+ for (; ldata->selected->prev && --count;
+ ldata->selected = ldata->selected->prev)
+ ;
+ break;
+
+ case '/': /* start searching */
+ if (ldata->list_fn->gl_matchrow)
+ {
+ char *s;
+ Input("Search: ", 80, INP_COOKED, glist_search, (char *)ldata, 0);
+ if ((s = ldata->search))
+ {
+ for (; *s; s++)
+ {
+ char *ss = s;
+ int n = 1;
+ LayProcess(&ss, &n);
+ }
+ }
+ }
+ break;
+
+ /* The following deal with searching. */
+
+ case 'n': /* search next */
+ if (ldata->list_fn->gl_matchrow && ldata->search)
+ ldata->selected = glist_search_dir(ldata, ldata->selected, 1);
+ break;
+
+ case 'N': /* search prev */
+ if (ldata->list_fn->gl_matchrow && ldata->search)
+ ldata->selected = glist_search_dir(ldata, ldata->selected, -1);
+ break;
+
+ /* Now, mouse events. */
+ case 0222:
+ if (flayer->l_mouseevent.start)
+ {
+ int button = flayer->l_mouseevent.buffer[0];
+ if (button == 'a') /* Scroll down */
+ ch = 'j';
+ else if (button == '`') /* Scroll up */
+ ch = 'k';
+ else if (button == ' ') /* Left click */
+ {
+ int y = flayer->l_mouseevent.buffer[2];
+ struct ListRow *r = ldata->top;
+ for (r = ldata->top; r && r->y != -1 && r->y != y; r = r->next)
+ ;
+ if (r && r->y == y)
+ ldata->selected = r;
+ ch = 0;
+ }
+ else
+ ch = 0;
+ LayProcessMouseSwitch(flayer, 0);
+ if (ch)
+ goto processchar;
+ }
+ else
+ LayProcessMouseSwitch(flayer, 1);
+ break;
+ }
+
+ if (old == ldata->selected) /* The selection didn't change */
+ continue;
+
+ if (ldata->selected->y == -1)
+ {
+ /* We need to list all the rows, since we are scrolling down. But first,
+ * find the top of the visible list. */
+ glist_decide_top(ldata);
+ glist_display_all(ldata);
+ }
+ else
+ {
+ /* just redisplay the two lines. */
+ ldata->list_fn->gl_printrow(ldata, old);
+ ldata->list_fn->gl_printrow(ldata, ldata->selected);
+ flayer->l_y = ldata->selected->y;
+ LaySetCursor();
+ }
+ }
+}
+
+static void ListAbort(void)
+{
+ LAY_CALL_UP(LRefreshAll(flayer, 0));
+ ExitOverlayPage();
+}
+
+static void ListFree(void *d)
+{
+ struct ListData *ldata = d;
+ glist_remove_rows(ldata);
+ if (ldata->list_fn->gl_free)
+ ldata->list_fn->gl_free(ldata);
+ if (ldata->search)
+ Free(ldata->search);
+}
+
+static void ListRedisplayLine(int y, int xs, int xe, int isblank)
+{
+ struct ListData *ldata;
+ ASSERT(flayer);
+
+ ldata = flayer->l_data;
+ if (y < 0)
+ {
+ glist_display_all(ldata);
+ return;
+ }
+
+ if (!isblank)
+ LClearArea(flayer, xs, y, xe, y, 0, 0);
+
+ if (ldata->top && y < ldata->top->y)
+ ldata->list_fn->gl_printheader(ldata);
+ else if (y + 1 == flayer->l_height)
+ ldata->list_fn->gl_printfooter(ldata);
+ else
+ {
+ struct ListRow *row;
+ for (row = ldata->top; row && row->y != -1; row = row->next)
+ if (row->y == y)
+ {
+ ldata->list_fn->gl_printrow(ldata, row);
+ break;
+ }
+ }
+}
+
+static void ListClearLine(int y, int xs, int xe, int bce)
+{
+ DefClearLine(y, xs, xe, bce);
+}
+
+static int ListRewrite(int y, int xs, int xe, struct mchar *rend, int doit)
+{
+ return EXPENSIVE;
+}
+
+static int ListResize (int wi, int he)
+{
+ if (wi < 10 || he < 5)
+ return -1;
+
+ flayer->l_width = wi;
+ flayer->l_height = he;
+ flayer->l_y = he - 1;
+
+ return 0;
+}
+
+static void ListRestore (void)
+{
+ DefRestore();
+}
+
+struct ListRow *
+glist_add_row(struct ListData *ldata, void *data, struct ListRow *after)
+{
+ struct ListRow *r = calloc(1, sizeof(struct ListRow));
+ r->data = data;
+
+ if (after)
+ {
+ r->next = after->next;
+ r->prev = after;
+ after->next = r;
+ if (r->next)
+ r->next->prev = r;
+ }
+ else
+ {
+ r->next = ldata->root;
+ if (ldata->root)
+ ldata->root->prev = r;
+ ldata->root = r;
+ }
+
+ return r;
+}
+
+void
+glist_remove_rows(struct ListData *ldata)
+{
+ struct ListRow *row;
+ for (row = ldata->root; row; )
+ {
+ struct ListRow *r = row;
+ row = row->next;
+ ldata->list_fn->gl_freerow(ldata, r);
+ free(r);
+ }
+ ldata->root = ldata->selected = ldata->top = NULL;
+}
+
+void
+glist_display_all(struct ListData *list)
+{
+ int y;
+ struct ListRow *row;
+
+ LClearAll(flayer, 0);
+
+ y = list->list_fn->gl_printheader(list);
+
+ if (!list->top)
+ list->top = list->root;
+ if (!list->selected)
+ list->selected = list->root;
+
+ for (row = list->root; row != list->top; row = row->next)
+ row->y = -1;
+
+ for (row = list->top; row; row = row->next)
+ {
+ row->y = y++;
+ if (!list->list_fn->gl_printrow(list, row))
+ {
+ row->y = -1;
+ y--;
+ }
+ if (y + 1 == flayer->l_height)
+ break;
+ }
+ for (; row; row = row->next)
+ row->y = -1;
+
+ list->list_fn->gl_printfooter(list);
+ if (list->selected && list->selected->y != -1)
+ flayer->l_y = list->selected->y;
+ else
+ flayer->l_y = flayer->l_height - 1;
+ LaySetCursor();
+}
+
+void glist_abort(void)
+{
+ ListAbort();
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 05:43:43 +0000