chore(vendor): import pi 1.3.0

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/tui/native/linux/src/clipboard-worker.h

@@ -0,0 +1,70 @@
+#include <pthread.h>
+#include <time.h>
+#include "../../clipboard.h"
+
+static void read_clipboard(clipboard_job* job);
+static pthread_mutex_t worker_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_once_t worker_once = PTHREAD_ONCE_INIT;
+static pthread_cond_t worker_changed;
+static bool worker_ready, worker_busy, worker_waiting, worker_finished;
+static clipboard_job worker_result;
+static int (*signal_worker)(pthread_cond_t*);
+static int (*wait_for_worker)(pthread_cond_t*, pthread_mutex_t*, const struct timespec*);
+
+static void initialize_worker_condition(void) {
+    // Unversioned ELF imports otherwise bind obsolete condition variables on glibc x64.
+    int (*initialize)(pthread_cond_t*, const pthread_condattr_t*) = node_symbol("pthread_cond_init");
+    signal_worker = node_symbol("pthread_cond_signal");
+    wait_for_worker = node_symbol("pthread_cond_timedwait");
+    if (!initialize || !signal_worker || !wait_for_worker) return;
+    pthread_condattr_t attributes;
+    if (pthread_condattr_init(&attributes) != 0) return;
+    worker_ready = pthread_condattr_setclock(&attributes, CLOCK_MONOTONIC) == 0 &&
+        initialize(&worker_changed, &attributes) == 0;
+    pthread_condattr_destroy(&attributes);
+}
+
+static void* read_on_private_thread(void* unused) {
+    (void)unused;
+    read_clipboard(&worker_result);
+    pthread_mutex_lock(&worker_mutex);
+    worker_finished = true;
+    if (!worker_waiting) {
+        free(worker_result.data); // The caller timed out; discard the late result.
+        worker_busy = false;
+    }
+    signal_worker(&worker_changed);
+    pthread_mutex_unlock(&worker_mutex);
+    return 0;
+}
+
+static void clipboard_execute(clipboard_job* job) {
+    pthread_once(&worker_once, initialize_worker_condition);
+    if (!worker_ready) return;
+    pthread_mutex_lock(&worker_mutex);
+    if (!worker_busy) {
+        worker_busy = worker_waiting = true;
+        worker_finished = false;
+        worker_result = (clipboard_job){.operation = job->operation};
+        struct timespec deadline;
+        clock_gettime(CLOCK_MONOTONIC, &deadline);
+        deadline.tv_sec += 3; // Allow the two-second transfer deadline to report its own error first.
+        pthread_t thread;
+        if (pthread_create(&thread, 0, read_on_private_thread, 0) == 0) {
+            pthread_detach(thread);
+            // Only this bounded wait occupies libuv. Other callers return unavailable.
+            while (!worker_finished && wait_for_worker(&worker_changed, &worker_mutex, &deadline) == 0) {}
+            if (worker_finished) {
+                job->data = worker_result.data;
+                job->length = worker_result.length;
+                job->format = worker_result.format;
+                job->error = worker_result.error;
+                worker_busy = false;
+            }
+        } else {
+            worker_busy = false;
+        }
+        worker_waiting = false;
+    }
+    pthread_mutex_unlock(&worker_mutex);
+}

third_party/pi/packages/tui/native/linux/src/linux-platform-x11.c

@@ -0,0 +1,274 @@
+#include <xcb/xcb.h>
+#include <string.h>
+#include <xcb/xcbext.h>
+#include <errno.h>
+#include <poll.h>
+#include <time.h>
+#include "clipboard-worker.h"
+
+#define MAX_CLIPBOARD_BYTES (50u * 1024u * 1024u)
+#define CLIPBOARD_TIMEOUT_MS 2000
+
+static const char* const text_types[] = {
+    "text/plain;charset=utf-8", "text/plain;charset=UTF-8", "UTF8_STRING", "text/plain", "STRING",
+};
+static const char* const image_types[] = {
+    "image/png", "image/jpeg", "image/webp", "image/gif", "image/bmp", "image/tiff",
+};
+
+static int64_t monotonic_ms(void) {
+    struct timespec now;
+    clock_gettime(CLOCK_MONOTONIC, &now);
+    return (int64_t)now.tv_sec * 1000 + now.tv_nsec / 1000000;
+}
+
+typedef struct {
+    unsigned char* data;
+    size_t length;
+    uint32_t items;
+    uint8_t format;
+    xcb_atom_t type;
+} property_data;
+
+typedef struct {
+    xcb_connection_t* connection;
+    xcb_window_t window;
+    xcb_atom_t clipboard;
+    xcb_atom_t property;
+    xcb_atom_t targets;
+    xcb_atom_t incr;
+    int64_t deadline;
+} x11_clipboard;
+
+static bool append_bytes(property_data* result, const unsigned char* bytes, size_t length) {
+    if (length > MAX_CLIPBOARD_BYTES - result->length) return false;
+    unsigned char* data = realloc(result->data, result->length + length + 1);
+    if (!data) return false;
+    memcpy(data + result->length, bytes, length);
+    result->length += length;
+    data[result->length] = 0;
+    result->data = data;
+    return true;
+}
+
+// Share one deadline across discovery, replies, and incremental chunks.
+// Connection setup and flushing are libxcb calls on the private thread.
+static bool wait_for_input(x11_clipboard* clipboard) {
+    for (;;) {
+        int64_t remaining = clipboard->deadline - monotonic_ms();
+        if (remaining <= 0 || xcb_connection_has_error(clipboard->connection)) return false;
+        struct pollfd descriptor = {xcb_get_file_descriptor(clipboard->connection), POLLIN, 0};
+        int ready = poll(&descriptor, 1, (int)remaining);
+        if (ready >= 0) return ready && (descriptor.revents & POLLIN);
+        if (errno != EINTR) return false;
+    }
+}
+
+static void* wait_for_reply(x11_clipboard* clipboard, unsigned sequence) {
+    if (xcb_flush(clipboard->connection) <= 0) return 0;
+    while (monotonic_ms() < clipboard->deadline) {
+        void* reply = 0;
+        xcb_generic_error_t* error = 0;
+        if (xcb_poll_for_reply(clipboard->connection, sequence, &reply, &error)) {
+            free(error);
+            return reply;
+        }
+        if (!wait_for_input(clipboard)) break;
+    }
+    xcb_discard_reply(clipboard->connection, sequence);
+    return 0;
+}
+
+static xcb_generic_event_t* wait_for_event(x11_clipboard* clipboard, uint8_t type) {
+    if (xcb_flush(clipboard->connection) <= 0) return 0;
+    while (monotonic_ms() < clipboard->deadline) {
+        xcb_generic_event_t* event = xcb_poll_for_event(clipboard->connection);
+        if (event) {
+            if ((event->response_type & 0x7f) == type) return event;
+            free(event);
+        } else if (!wait_for_input(clipboard)) {
+            break;
+        }
+    }
+    return 0;
+}
+
+static bool read_property(x11_clipboard* clipboard, bool remove, property_data* result) {
+    xcb_get_property_cookie_t cookie = xcb_get_property(
+        clipboard->connection, remove, clipboard->window, clipboard->property,
+        XCB_GET_PROPERTY_TYPE_ANY, 0, MAX_CLIPBOARD_BYTES / 4
+    );
+    xcb_get_property_reply_t* reply = wait_for_reply(clipboard, cookie.sequence);
+    if (!reply) return false;
+    bool copied = false;
+    bool valid_format = reply->format == 8 || reply->format == 16 || reply->format == 32;
+    uint64_t length = (uint64_t)reply->value_len * (reply->format / 8);
+    if (reply->bytes_after == 0 && reply->type != XCB_NONE && valid_format &&
+        length <= MAX_CLIPBOARD_BYTES && length <= (uint64_t)reply->length * 4) {
+        result->type = reply->type;
+        result->format = reply->format;
+        result->items = reply->value_len;
+        copied = append_bytes(result, xcb_get_property_value(reply), (size_t)length);
+    }
+    free(reply);
+    return copied;
+}
+
+static bool append_property(property_data* result, const property_data* chunk) {
+    if ((chunk->format != 8 && chunk->format != 16 && chunk->format != 32) ||
+        chunk->type == XCB_NONE ||
+        (uint64_t)chunk->items * (chunk->format / 8) != chunk->length ||
+        (result->type != XCB_NONE && (result->type != chunk->type || result->format != chunk->format)) ||
+        chunk->items > UINT32_MAX - result->items) return false;
+    if (!append_bytes(result, chunk->data, chunk->length)) return false;
+    result->type = chunk->type;
+    result->format = chunk->format;
+    result->items += chunk->items;
+    return true;
+}
+
+static bool request_selection(x11_clipboard* clipboard, xcb_atom_t target, property_data* result) {
+    memset(result, 0, sizeof(*result));
+    xcb_delete_property(clipboard->connection, clipboard->window, clipboard->property);
+    xcb_convert_selection(
+        clipboard->connection, clipboard->window, clipboard->clipboard,
+        target, clipboard->property, XCB_CURRENT_TIME
+    );
+
+    while (true) {
+        xcb_selection_notify_event_t* event = (xcb_selection_notify_event_t*)wait_for_event(clipboard, XCB_SELECTION_NOTIFY);
+        if (!event) return false;
+        bool matches = event->selection == clipboard->clipboard && event->target == target;
+        bool received = event->property != XCB_NONE;
+        free(event);
+        if (!matches) continue;
+        if (!received) return true; // No owner, or the owner does not offer this target.
+        if (!read_property(clipboard, false, result)) return false;
+        break;
+    }
+    if (result->type != clipboard->incr) return true;
+
+    free(result->data);
+    memset(result, 0, sizeof(*result));
+    xcb_delete_property(clipboard->connection, clipboard->window, clipboard->property);
+
+    while (true) {
+        xcb_property_notify_event_t* event = (xcb_property_notify_event_t*)wait_for_event(clipboard, XCB_PROPERTY_NOTIFY);
+        if (!event) return false;
+        bool matches = event->atom == clipboard->property && event->state == XCB_PROPERTY_NEW_VALUE;
+        free(event);
+        if (!matches) continue;
+
+        property_data chunk = {0};
+        if (!read_property(clipboard, true, &chunk)) return false;
+        bool appended = append_property(result, &chunk);
+        bool finished = chunk.items == 0;
+        free(chunk.data);
+        if (!appended) return false;
+        if (finished) return true;
+    }
+}
+
+static xcb_atom_t intern_atom(x11_clipboard* clipboard, const char* name) {
+    xcb_intern_atom_cookie_t cookie = xcb_intern_atom(clipboard->connection, false, strlen(name), name);
+    xcb_intern_atom_reply_t* reply = wait_for_reply(clipboard, cookie.sequence);
+    if (!reply) return XCB_NONE;
+    xcb_atom_t atom = reply->atom;
+    free(reply);
+    return atom;
+}
+
+static bool open_clipboard(x11_clipboard* clipboard) {
+    memset(clipboard, 0, sizeof(*clipboard));
+    clipboard->deadline = monotonic_ms() + CLIPBOARD_TIMEOUT_MS;
+    int screen_number = 0;
+    clipboard->connection = xcb_connect(0, &screen_number);
+    if (xcb_connection_has_error(clipboard->connection)) return false;
+    xcb_screen_iterator_t screens = xcb_setup_roots_iterator(xcb_get_setup(clipboard->connection));
+    while (screen_number-- > 0 && screens.rem) xcb_screen_next(&screens);
+    if (!screens.rem) return false;
+
+    clipboard->window = xcb_generate_id(clipboard->connection);
+    uint32_t mask = XCB_EVENT_MASK_PROPERTY_CHANGE;
+    xcb_create_window(
+        clipboard->connection, XCB_COPY_FROM_PARENT, clipboard->window,
+        screens.data->root, 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT,
+        XCB_COPY_FROM_PARENT, XCB_CW_EVENT_MASK, &mask
+    );
+    clipboard->clipboard = intern_atom(clipboard, "CLIPBOARD");
+    clipboard->property = intern_atom(clipboard, "PI_CLIPBOARD");
+    clipboard->targets = intern_atom(clipboard, "TARGETS");
+    clipboard->incr = intern_atom(clipboard, "INCR");
+    return clipboard->clipboard && clipboard->property && clipboard->targets && clipboard->incr;
+}
+
+static void close_clipboard(x11_clipboard* clipboard) {
+    if (clipboard->connection) xcb_disconnect(clipboard->connection);
+}
+
+static bool preferred_target(x11_clipboard* clipboard, bool image, xcb_atom_t* target) {
+    const char* const* types = image ? image_types : text_types;
+    size_t type_count = image ? 6 : 5;
+    xcb_atom_t wanted[6];
+    for (size_t index = 0; index < type_count; index++) {
+        wanted[index] = intern_atom(clipboard, types[index]);
+        if (wanted[index] == XCB_NONE) return false;
+    }
+
+    property_data targets = {0};
+    bool received = request_selection(clipboard, clipboard->targets, &targets);
+    bool valid = targets.type == XCB_ATOM_ATOM && targets.format == 32 &&
+        targets.items == targets.length / sizeof(xcb_atom_t) && targets.length % sizeof(xcb_atom_t) == 0;
+    if (received && valid) {
+        xcb_atom_t* offered = (xcb_atom_t*)targets.data;
+        for (size_t wanted_index = 0; wanted_index < type_count; wanted_index++) {
+            for (uint32_t offered_index = 0; offered_index < targets.items; offered_index++) {
+                if (offered[offered_index] == wanted[wanted_index]) {
+                    free(targets.data);
+                    *target = wanted[wanted_index];
+                    return true;
+                }
+            }
+        }
+    }
+    free(targets.data);
+    // Some owners refuse TARGETS but still serve text directly.
+    if (received && !image && targets.type == XCB_NONE) {
+        *target = intern_atom(clipboard, "UTF8_STRING");
+        return *target != XCB_NONE;
+    }
+    return received && (valid || targets.type == XCB_NONE);
+}
+
+static bool read_selection(x11_clipboard* clipboard, bool image, property_data* result) {
+    xcb_atom_t target = XCB_NONE;
+    bool received = preferred_target(clipboard, image, &target) &&
+        (target == XCB_NONE || request_selection(clipboard, target, result));
+    if (!received) {
+        free(result->data);
+        memset(result, 0, sizeof(*result));
+    }
+    return received;
+}
+
+static void read_clipboard(clipboard_job* job) {
+    x11_clipboard clipboard;
+    if (open_clipboard(&clipboard)) {
+        property_data contents = {0};
+        if (!read_selection(&clipboard, job->operation == CLIPBOARD_IMAGE, &contents)) {
+            job->error = "Could not read X11 clipboard";
+        } else {
+            job->data = contents.data;
+            job->length = contents.length;
+            job->format = !contents.data ? CLIPBOARD_EMPTY : job->operation == CLIPBOARD_IMAGE
+                ? CLIPBOARD_BUFFER : contents.type == XCB_ATOM_STRING ? CLIPBOARD_LATIN1 : CLIPBOARD_UTF8;
+        }
+    }
+    close_clipboard(&clipboard);
+}
+
+PI_NAPI_EXPORT napi_value napi_register_module_v1(napi_env env, napi_value exports) {
+    set_function_export(env, exports, "getText", get_clipboard_text);
+    set_function_export(env, exports, "getImage", get_clipboard_image);
+    return exports;
+}