redesign compositor protocol, start widget library

2 files changed, 69 insertions, 80 deletions

diff --git a/applications/goldman/source/socket.cpp b/applications/goldman/source/socket.cpp
index b175fe9..9ebd644 100644
--- a/applications/goldman/source/socket.cpp
+++ b/applications/goldman/source/socket.cpp
@@ -8,114 +8,95 @@
 struct socket_state {
 
   euler::syscall::stream_handle socket;
-  std::vector<window *> windows;
-  daguerre::hilbert_color window_bg = euler::syscall::encode_color(0, 0, 0);
+  window *w;
 
-  bool try_open_window() {
+  bool try_show_window() {
 
-    struct [[gnu::packed]] {
-      uint32_t width;
-      uint32_t height;
-    } body;
-
-    if (euler::syscall::read_from_stream(socket, sizeof(body), &body) !=
-        euler::syscall::stream_result::success)
+    if (w->is_shown)
       return false;
 
-    window *w = new window(body.width, body.height);
-    w->contents.fill(window_bg);
+    r->lock();
+    r->add_window(w);
+    r->unlock();
+    r->dispatch_render();
+    return true;
 
-    uint16_t wid = 0;
+  }
 
-    while (wid < windows.size())
-      if (windows[wid] != 0)
-        ++wid;
-      else
-        break;
+  bool try_hide_window() {
 
-    if (wid == windows.size())
-      windows.push_back(w);
-    else
-      windows[wid] = w;
+    if (!w->is_shown)
+      return false;
 
     r->lock();
-    r->add_window(w);
+    r->remove_window(w);
     r->unlock();
-
-    struct [[gnu::packed]] {
-      uint8_t type;
-      uint16_t the_window;
-    } response {
-      .type = 0x00,
-      .the_window = wid
-    };
-
-    return
-      euler::syscall::write_to_stream(socket, sizeof(response), &response) ==
-      euler::syscall::stream_result::success;
+    r->dispatch_render();
+    return true;
 
   }
 
-  bool try_update_window_region() {
+  bool try_set_window_dimensions() {
 
-    struct [[gnu::packed]] {
-      uint16_t window;
-      uint32_t start_x;
-      uint32_t start_y;
-      uint32_t width;
-      uint32_t height;
-    } body_head;
-
-    if (euler::syscall::read_from_stream(socket, sizeof(body_head), &body_head) !=
+    struct [[gnu::packed]] { uint32_t width; uint32_t height; } packet;
+    if (euler::syscall::read_from_stream(socket, sizeof(packet), &packet) !=
         euler::syscall::stream_result::success)
       return false;
 
-    std::vector<daguerre::hilbert_color> data(body_head.width * body_head.height);
-
-    if (euler::syscall::read_from_stream(socket, data.size() * 4, data.data()) !=
-        euler::syscall::stream_result::success)
+    if (packet.width > __INT_MAX__ || packet.height > __INT_MAX__)
       return false;
 
-    daguerre::image<daguerre::hilbert_color>
-      data_as_image(body_head.width, body_head.height, data.data(), body_head.width, false);
-
-    if (body_head.window >= windows.size() || !windows[body_head.window])
-      return false;
+    r->lock();
+    w->contents = daguerre::image<daguerre::hilbert_color>(
+      packet.width, packet.height);
+    r->unlock();
+    return true;
 
-    window *w = windows[body_head.window];
+  }
 
-    r->lock();
+  bool try_set_window_title() {
 
-    if ((int)body_head.start_x + data_as_image.width > w->contents.width ||
-        (int)body_head.start_y + data_as_image.height > w->contents.height) {
-      r->unlock();
+    uint32_t length;
+    if (euler::syscall::read_from_stream(socket, 4, &length) !=
+        euler::syscall::stream_result::success)
       return false;
-    }
 
-    w->contents.copy_from(data_as_image, body_head.start_x, body_head.start_y);
+    std::string title;
+    title.resize(length);
+    if (euler::syscall::read_from_stream(socket, length, title.data()) !=
+        euler::syscall::stream_result::success)
+      return false;
 
+    r->lock();
+    w->title = std::move(title);
     r->unlock();
     r->dispatch_render();
     return true;
 
   }
 
-  bool try_close_window() {
-
-    uint16_t wid;
+  bool try_update_window_region() {
 
-    if (euler::syscall::read_from_stream(socket, 2, &wid) !=
+    struct [[gnu::packed]] {
+      uint32_t start_x; uint32_t start_y; uint32_t width; uint32_t height;
+    } packet;
+    if (euler::syscall::read_from_stream(socket, sizeof(packet), &packet) !=
         euler::syscall::stream_result::success)
       return false;
 
-    if (wid >= windows.size() || !windows[wid])
+    static_assert(__INT_MAX__ <= __UINT64_MAX__);
+    if ((uint64_t)packet.start_x + packet. width > (uint64_t)w->contents. width ||
+        (uint64_t)packet.start_y + packet.height > (uint64_t)w->contents.height)
       return false;
 
-    r->lock();
-
-    r->remove_window(windows[wid]);
-    windows[wid] = 0;
+    daguerre::image<daguerre::hilbert_color> content(packet.width, packet.height);
+    if (euler::syscall::read_from_stream(
+          socket, packet.width * packet.height * 4, content.buffer) !=
+        euler::syscall::stream_result::success)
+      return false;
 
+    r->lock();
+    w->contents.copy_from(content, packet.start_x, packet.start_y);
     r->unlock();
     r->dispatch_render();
     return true;
@@ -130,9 +111,11 @@ struct socket_state {
       return false;
 
     switch (type) {
-    case 0x00: return try_open_window();
-    case 0x01: return try_update_window_region();
-    case 0x02: return try_close_window();
+    case 0x00: return try_show_window();
+    case 0x01: return try_hide_window();
+    case 0x02: return try_set_window_dimensions();
+    case 0x03: return try_set_window_title();
+    case 0x04: return try_update_window_region();
     default: return false;
     }
 
@@ -144,18 +127,20 @@ struct socket_state {
 
   euler::syscall::set_thread_name("socket thread");
 
+  window *w = new window();
   socket_state *state = new socket_state {
-    .socket = socket, .windows = {} };
+    .socket = socket, .w = w };
+
   while (state->try_process_request()) ;
 
-  r->lock();
-  for (unsigned i = 0; i < state->windows.size(); ++i) {
-    r->remove_window(state->windows[i]);
-    delete state->windows[i];
+  if (w->is_shown) {
+    r->lock();
+    r->remove_window(w);
+    r->unlock();
   }
-  r->unlock();
 
   delete state;
+  delete w;
   euler::syscall::close_stream(socket);
   euler::syscall::end_this_thread(0);
 
diff --git a/applications/goldman/source/window.hpp b/applications/goldman/source/window.hpp
index 008af2f..4d5b0e1 100644
--- a/applications/goldman/source/window.hpp
+++ b/applications/goldman/source/window.hpp
@@ -9,6 +9,10 @@ struct window {
   int x;
   int y;
 
-  window(int width, int height) : contents(width, height), x(0), y(0) {}
+  bool is_shown;
+
+  std::string title;
+
+  window() : x(0), y(0), is_shown(false) {}
 
 };