Add sources for the file manager program (#944)

libs/core/platform.cpp

@@ -120,7 +120,7 @@ void stopLMS() {
         if (!pid)
             continue;
         char namebuf[100];
-        snprintf(namebuf, 1000, "/proc/%d/cmdline", pid);
+        snprintf(namebuf, 100, "/proc/%d/cmdline", pid);
         FILE *f = fopen(namebuf, "r");
         if (f) {
             fread(namebuf, 1, 99, f);
@@ -195,5 +195,42 @@ void target_startup() {
 
 void initKeys() {}
 
+static const char *progPath = "/mnt/ramdisk/prjs/BrkProg_SAVE";
+
+// These are disabled except when building File_manager.pdf
+// %
+void deletePrjFile(String filename) {
+    const char *d = filename->getUTF8Data();
+    if (strlen(d) > 500 || strchr(d, '/'))
+        return;
+    char buf[1024];
+    snprintf(buf, sizeof(buf), "%s/%s", progPath, d);
+    unlink(buf);
+}
+
+// %
+RefCollection *listPrjFiles() {
+    auto res = Array_::mk();
+    registerGCObj(res);
+
+    auto dp = opendir(progPath);
+
+    for (;;) {
+        dirent *ep = dp ? readdir(dp) : NULL;
+        if (!ep)
+            break;
+        if (ep->d_name[0] == '.')
+            continue;
+        auto str = mkString(ep->d_name, -1);
+        registerGCObj(str);
+        res->head.push((TValue)str);
+        unregisterGCObj(str);
+    }
+    if (dp)
+        closedir(dp);
+    unregisterGCObj(res);
+
+    return res;
+}
 
 }

scripts/file_manager.ts

@@ -0,0 +1,97 @@
+//% shim=pxt::listPrjFiles
+function getPrjs() {
+    let programs = [
+        "pxt",
+        "my amazing robot",
+    ]
+    for (let i = 1; i < 6; ++i)
+        programs.push("Untitled-" + i)
+    return programs
+}
+
+//% shim=pxt::deletePrjFile
+function delPrj(fn: string) {
+    return
+}
+
+const programs = getPrjs()
+    .filter(s => s.substr(s.length - 4, 4) == ".rbf")
+    .map(s => s.substr(0, s.length - 4))
+    .filter(s => s != "File_manager")
+
+programs.push("")
+programs.push("Cancel")
+programs.push("Delete 0 files")
+
+let todel: boolean[] = []
+let scrollTop = 0
+let cursor = 0
+let confirm = false
+function showMenu() {
+    if (cursor < scrollTop + 2)
+        scrollTop = cursor - 2
+    else if (cursor > scrollTop + 11)
+        scrollTop = cursor - 11
+    if (scrollTop < 0)
+        scrollTop = 0
+    let num = 0
+    for (let i = 0; i < todel.length; ++i)
+        if (todel[i]) num++
+    programs[programs.length - 1] =
+        confirm ? "Enter to confirm" : "Delete " + num + " file(s)"
+
+    brick.clearScreen()
+
+    const h = brick.lineHeight()
+    for (let i = 0; i < 13; ++i) {
+        const y = i * h
+        const idx = scrollTop + i
+        const fg = idx == cursor ? 0 : 1
+        const bg = idx == cursor ? 1 : 0
+        // screen.fillRect(0, y, screen.width, h, bg);
+        let text = (idx == cursor ? ">" : " ")
+            + (todel[idx] ? "*" : " ")
+            + " "
+            + (programs[scrollTop + i] || "")
+        screen.print(text, 0, y, fg, brick.font);
+    }
+}
+function move(d: number) {
+    confirm = false
+    const nc = cursor + d
+    if (0 <= nc && nc < programs.length)
+        cursor = nc
+    showMenu()
+}
+brick.buttonDown.onEvent(ButtonEvent.Pressed, () => move(1))
+brick.buttonUp.onEvent(ButtonEvent.Pressed, () => move(-1))
+brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
+    if (cursor < programs.length - 3) {
+        todel[cursor] = !todel[cursor]
+        move(1)
+    } else if (cursor == programs.length - 3) {
+        // nothing
+    } else if (cursor == programs.length - 2) {
+        control.reset()
+    } else if (cursor == programs.length - 1) {
+        if (todel.every(x => !x))
+            return
+        if (confirm) {
+            brick.clearScreen()
+            brick.showString("deleting...", 6)
+            for (let i = 0; i < todel.length; ++i) {
+                if (todel[i]) {
+                    delPrj(programs[i] + ".elf")
+                    delPrj(programs[i] + ".rbf")
+                }
+            }
+            pause(1000)
+            control.reset()
+        } else {
+            confirm = true
+            showMenu()
+        }
+    }
+})
+showMenu()
+