diff options
Diffstat (limited to 'thumbs.c')
| -rw-r--r-- | thumbs.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/thumbs.c b/thumbs.c new file mode 100644 index 0000000..3de9518 --- /dev/null +++ b/thumbs.c @@ -0,0 +1,224 @@ +/* sxiv: thumbs.c + * Copyright (c) 2011 Bert Muennich <muennich at informatik.hu-berlin.de> + * + * 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 2 of the License, 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; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <stdlib.h> +#include <string.h> + +#include <Imlib2.h> + +#include "config.h" +#include "thumbs.h" +#include "util.h" + +extern int fileidx; +extern Imlib_Image *im_broken; + +const int thumb_dim = THUMB_SIZE + 10; + +void tns_init(tns_t *tns, int cnt) { + if (!tns) + return; + + tns->cnt = tns->first = 0; + tns->thumbs = (thumb_t*) s_malloc(cnt * sizeof(thumb_t)); + memset(tns->thumbs, 0, cnt * sizeof(thumb_t)); + tns->dirty = 0; +} + +void tns_free(tns_t *tns, win_t *win) { + int i; + + if (!tns) + return; + + for (i = 0; i < tns->cnt; ++i) + win_free_pixmap(win, tns->thumbs[i].pm); + + free(tns->thumbs); + tns->thumbs = NULL; +} + +void tns_load(tns_t *tns, win_t *win, const char *filename) { + int w, h; + float z, zw, zh; + thumb_t *t; + Imlib_Image *im; + + if (!tns || !win || !filename) + return; + + if ((im = imlib_load_image(filename))) + imlib_context_set_image(im); + else + imlib_context_set_image(im_broken); + + w = imlib_image_get_width(); + h = imlib_image_get_height(); + zw = (float) THUMB_SIZE / (float) w; + zh = (float) THUMB_SIZE / (float) h; + z = MIN(zw, zh); + if (!im && z > 1.0) + z = 1.0; + + t = &tns->thumbs[tns->cnt++]; + t->w = z * w; + t->h = z * h; + + t->pm = win_create_pixmap(win, t->w, t->h); + imlib_context_set_drawable(t->pm); + imlib_render_image_part_on_drawable_at_size(0, 0, w, h, + 0, 0, t->w, t->h); + imlib_free_image(); + tns->dirty = 1; +} + +void tns_check_view(tns_t *tns, Bool scrolled) { + if (!tns) + return; + + tns->first -= tns->first % tns->cols; + + if (scrolled) { + /* move selection into visible area */ + } else { + /* scroll to selection */ + if (tns->first + tns->cols * tns->rows <= fileidx) { + tns->first = fileidx - fileidx % tns->cols - + tns->cols * (tns->rows - 1); + tns->dirty = 1; + } else if (tns->first > fileidx) { + tns->first = fileidx - fileidx % tns->cols; + tns->dirty = 1; + } + } +} + +void tns_render(tns_t *tns, win_t *win) { + int i, cnt, r, x, y; + thumb_t *t; + + if (!tns || !tns->dirty || !win) + return; + + win_clear(win); + + tns->cols = MAX(1, win->w / thumb_dim); + tns->rows = MAX(1, win->h / thumb_dim); + + if (tns->cnt < tns->cols * tns->rows) { + tns->first = 0; + cnt = tns->cnt; + } else { + tns_check_view(tns, False); + cnt = tns->cols * tns->rows; + if ((r = tns->first + cnt - tns->cnt) >= tns->cols) + tns->first -= r - r % tns->cols; + if (r > 0) + cnt -= r % tns->cols; + } + + r = cnt % tns->cols ? 1 : 0; + tns->x = x = (win->w - MIN(cnt, tns->cols) * thumb_dim) / 2 + 5; + tns->y = y = (win->h - (cnt / tns->cols + r) * thumb_dim) / 2 + 5; + + for (i = 0; i < cnt; ++i) { + t = &tns->thumbs[tns->first + i]; + t->x = x + (THUMB_SIZE - t->w) / 2; + t->y = y + (THUMB_SIZE - t->h) / 2; + win_draw_pixmap(win, t->pm, t->x, t->y, t->w, t->h); + if ((i + 1) % tns->cols == 0) { + x = tns->x; + y += thumb_dim; + } else { + x += thumb_dim; + } + } + + tns->dirty = 0; + tns_highlight(tns, win, fileidx, True); +} + +void tns_highlight(tns_t *tns, win_t *win, int n, Bool hl) { + thumb_t *t; + + if (!tns || !win) + return; + + if (n >= 0 && n < tns->cnt) { + t = &tns->thumbs[n]; + win_draw_rect(win, t->x - 2, t->y - 2, t->w + 4, t->h + 4, hl); + } + + win_draw(win); +} + +int tns_move_selection(tns_t *tns, win_t *win, movedir_t dir) { + int old; + + if (!tns || !win) + return 0; + + old = fileidx; + + switch (dir) { + case MOVE_LEFT: + if (fileidx > 0) + --fileidx; + break; + case MOVE_RIGHT: + if (fileidx < tns->cnt - 1) + ++fileidx; + break; + case MOVE_UP: + if (fileidx >= tns->cols) + fileidx -= tns->cols; + break; + case MOVE_DOWN: + if (fileidx + tns->cols < tns->cnt) + fileidx += tns->cols; + break; + } + + if (fileidx != old) { + tns_highlight(tns, win, old, False); + tns_check_view(tns, False); + if (!tns->dirty) + tns_highlight(tns, win, fileidx, True); + } + + return fileidx != old; +} + +int tns_translate(tns_t *tns, int x, int y) { + int n; + thumb_t *t; + + if (!tns || x < tns->x || y < tns->y) + return -1; + + n = tns->first + (y - tns->y) / thumb_dim * tns->cols + + (x - tns->x) / thumb_dim; + + if (n < tns->cnt) { + t = &tns->thumbs[n]; + if (x >= t->x && x <= t->x + t->w && y >= t->y && y <= t->y + t->h) + return n; + } + + return -1; +} |