AskaEth
bed6a95485
- 新增顶层 tuku/ 工程（package dev.tuku.app、二进制 tuku）：app.c/internal 头/logic/ui 分层、app.json、build/pack 脚本 - 书库：从 TF 卡根浏览文件夹，含图目录=一本书；logic/library 纯 C 扫描+自然排序（page2<page10） - 流式缩略图：后台线程解码+meow_img_downscale(96)，首帧/滚动不阻塞；磁盘缓存 MeowData/<pkg>/cache（mtime 失效+LRU） - 列表 meow_listview 虚拟化 + meow_scroll fling/snap；行=缩略图+目录名+页数 - 主题：全部语义色 + meow_theme_add_listener 即时重绘；明暗/风格族两态可读 - 导航：meow_view page push/pop、TopAppBar ⚙→设置；reader/settings/lock 最小桩 - 接缝：mr_reader_get/set_direction（默认 RTL）、lock_view_should_show()（桩 0） - 宿主 gcc 测试 46 项 PASS；交叉构建静态 MIPS32r2 ELF、-Wall -Wextra 零警告
248 lines
8.0 KiB
C
248 lines
8.0 KiB
C
/* logic/library.c — 书库目录扫描 + 自然排序（纯 C）。
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*
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* 扫描分两步：
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* 1) scan_info()：递归探测一个目录是否「最终含图」，并带回直接图片数 / 含图子目录数 /
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* 缩略图源（优先本目录自然序第一张，其次第一个含图子目录）；
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* 2) mr_library_scan()：只对目标目录的**直接子目录**调用 scan_info()，把 nav=1 的目录
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* 收进结果并自然排序——因此根视图不会列出后代条目，进入子目录时再重新扫描该层。
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*
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* 内存：条目数组倍增分配；路径/名称定长，随 mr_library_free() 释放。
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*/
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#include "library.h"
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#include <ctype.h>
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#include <dirent.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <sys/stat.h>
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/* 系统目录不参与书库（SD 根上的 MeowOS 目录树）。 */
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static int ignored_dir_name(const char *name)
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{
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static const char *const skip[] = { "MeowAPPs", "MeowData", "MeowOS", "lost+found" };
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if (!name || name[0] == '.') return 1;
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for (unsigned i = 0; i < sizeof skip / sizeof skip[0]; i++)
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if (strcmp(name, skip[i]) == 0) return 1;
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return 0;
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}
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static int copy_str(char *dst, int dstsz, const char *src)
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{
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if (!dst || dstsz <= 0) return -1;
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if (!src) { dst[0] = '\0'; return 0; }
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int n = (int)strlen(src);
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if (n >= dstsz) return -1;
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memcpy(dst, src, (size_t)n + 1);
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return 0;
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}
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static int join_path(char *out, int outsz, const char *dir, const char *name)
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{
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if (!out || outsz <= 0 || !dir || !name) return -1;
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int n;
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size_t dl = strlen(dir);
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if (dl > 0 && dir[dl - 1] == '/')
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n = snprintf(out, (size_t)outsz, "%s%s", dir, name);
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else
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n = snprintf(out, (size_t)outsz, "%s/%s", dir, name);
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return (n > 0 && n < outsz) ? 0 : -1;
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}
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int mr_path_is_image(const char *name)
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{
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if (!name) return 0;
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const char *dot = strrchr(name, '.');
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if (!dot || dot == name) return 0;
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dot++;
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return strcasecmp(dot, "png") == 0 || strcasecmp(dot, "jpg") == 0 ||
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strcasecmp(dot, "jpeg") == 0 || strcasecmp(dot, "bmp") == 0;
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}
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int mr_natural_cmp(const char *a, const char *b)
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{
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const unsigned char *pa = (const unsigned char *)a;
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const unsigned char *pb = (const unsigned char *)b;
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if (!a || !b) return (a == b) ? 0 : (a ? 1 : -1);
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while (*pa && *pb) {
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if (isdigit(*pa) && isdigit(*pb)) {
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const unsigned char *za = pa, *zb = pb;
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while (*pa == '0') pa++;
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while (*pb == '0') pb++;
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const unsigned char *da = pa, *db = pb;
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while (isdigit(*pa)) pa++;
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while (isdigit(*pb)) pb++;
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size_t la = (size_t)(pa - da), lb = (size_t)(pb - db);
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if (la != lb) return la < lb ? -1 : 1;
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if (la > 0) {
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int c = memcmp(da, db, la);
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if (c != 0) return c < 0 ? -1 : 1;
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}
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size_t oa = (size_t)(da - za), ob = (size_t)(db - zb);
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if (oa != ob) return oa < ob ? -1 : 1;
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continue;
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}
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int ca = tolower(*pa), cb = tolower(*pb);
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if (ca != cb) return ca < cb ? -1 : 1;
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pa++;
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pb++;
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}
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if (*pa) return 1;
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if (*pb) return -1;
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return strcmp(a, b) < 0 ? -1 : (strcmp(a, b) > 0 ? 1 : 0);
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}
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typedef struct scan_info {
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int pages; /* 直接图片数 */
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int subdirs; /* 含图子目录数 */
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int nav; /* 1=本目录最终含图（可直接看或可导航到图） */
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char cover[MR_PATH_MAX]; /* 缩略图源 */
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char first_name[MR_NAME_MAX]; /* 本目录自然序第一张图片的文件名（比较用） */
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} scan_info;
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static void scan_dir(const char *path, int depth, int max_depth, scan_info *si)
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{
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memset(si, 0, sizeof *si);
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DIR *d = opendir(path);
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if (!d) return;
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struct dirent *de;
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while ((de = readdir(d)) != NULL) {
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const char *name = de->d_name;
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if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0) continue;
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if (ignored_dir_name(name)) continue;
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char full[MR_PATH_MAX];
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if (join_path(full, (int)sizeof full, path, name) != 0) continue;
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struct stat st;
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if (lstat(full, &st) != 0) continue;
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if (S_ISLNK(st.st_mode)) continue;
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if (S_ISDIR(st.st_mode)) {
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if (depth >= max_depth) continue;
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scan_info child;
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scan_dir(full, depth + 1, max_depth, &child);
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if (!child.nav) continue;
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si->subdirs++;
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if (!si->cover[0] && child.cover[0])
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copy_str(si->cover, (int)sizeof si->cover, child.cover);
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} else if (S_ISREG(st.st_mode) && mr_path_is_image(name)) {
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si->pages++;
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if (!si->first_name[0] || mr_natural_cmp(name, si->first_name) < 0) {
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copy_str(si->first_name, (int)sizeof si->first_name, name);
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copy_str(si->cover, (int)sizeof si->cover, full);
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}
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}
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}
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closedir(d);
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si->nav = (si->pages > 0 || si->subdirs > 0);
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}
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void mr_library_free(mr_library *lib)
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{
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if (!lib) return;
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free(lib->items);
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lib->items = NULL;
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lib->count = 0;
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lib->cap = 0;
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}
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static int lib_add(mr_library *lib, const mr_library_entry *e)
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{
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if (lib->count >= lib->cap) {
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int cap = lib->cap ? lib->cap * 2 : 16;
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mr_library_entry *ni = (mr_library_entry *)realloc(lib->items,
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(size_t)cap * sizeof *ni);
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if (!ni) return -1;
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lib->items = ni;
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lib->cap = cap;
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}
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lib->items[lib->count++] = *e;
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return 0;
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}
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static int entry_cmp(const void *pa, const void *pb)
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{
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const mr_library_entry *a = (const mr_library_entry *)pa;
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const mr_library_entry *b = (const mr_library_entry *)pb;
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return mr_natural_cmp(a->name, b->name);
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}
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int mr_library_scan(mr_library *lib, const char *dir, int max_depth)
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{
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if (!lib) return -1;
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mr_library_free(lib);
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if (!dir || !dir[0]) return -1;
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if (max_depth <= 0 || max_depth > MR_LIB_MAX_DEPTH) max_depth = MR_LIB_MAX_DEPTH;
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DIR *d = opendir(dir);
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if (!d) return -1;
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struct dirent *de;
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while ((de = readdir(d)) != NULL) {
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const char *name = de->d_name;
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if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0) continue;
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if (ignored_dir_name(name)) continue;
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char full[MR_PATH_MAX];
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if (join_path(full, (int)sizeof full, dir, name) != 0) continue;
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struct stat st;
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if (lstat(full, &st) != 0) continue;
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if (S_ISLNK(st.st_mode) || !S_ISDIR(st.st_mode)) continue;
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scan_info si;
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scan_dir(full, 1, max_depth, &si);
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if (!si.nav) continue;
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mr_library_entry e;
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memset(&e, 0, sizeof e);
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if (copy_str(e.name, (int)sizeof e.name, name) != 0) continue;
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if (copy_str(e.path, (int)sizeof e.path, full) != 0) continue;
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copy_str(e.cover, (int)sizeof e.cover, si.cover);
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e.pages = si.pages;
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e.subdirs = si.subdirs;
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e.has_images = (si.pages > 0);
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if (e.has_images)
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snprintf(e.subtitle, sizeof e.subtitle, "%d page%s", e.pages,
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e.pages == 1 ? "" : "s");
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else
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snprintf(e.subtitle, sizeof e.subtitle, "%d folder%s", e.subdirs,
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e.subdirs == 1 ? "" : "s");
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if (lib_add(lib, &e) != 0) {
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closedir(d);
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mr_library_free(lib);
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return -1;
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}
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}
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closedir(d);
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if (lib->count > 1) qsort(lib->items, (size_t)lib->count, sizeof *lib->items, entry_cmp);
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return lib->count;
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}
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int mr_path_parent(const char *path, char *out, int outsz)
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{
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if (!path || !out || outsz <= 0) return -1;
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size_t n = strlen(path);
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while (n > 1 && path[n - 1] == '/') n--;
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if (n <= 1) {
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if (outsz < 2) return -1;
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out[0] = '/';
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out[1] = '\0';
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return 0;
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}
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while (n > 0 && path[n - 1] != '/') n--;
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while (n > 1 && path[n - 1] == '/') n--;
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if (n >= (size_t)outsz) return -1;
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memcpy(out, path, n);
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out[n] = '\0';
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return 0;
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}
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