1 files changed, 260 insertions, 0 deletions
diff --git a/src/game/client/chat.cc b/src/game/client/chat.cc
new file mode 100644
index 0000000..0a0c75d
--- /dev/null
+++ b/src/game/client/chat.cc
@@ -0,0 +1,260 @@
+#include "client/pch.hh"
+
+#include "client/chat.hh"
+
+#include "core/config.hh"
+#include "core/resource.hh"
+#include "core/strtools.hh"
+
+#include "shared/protocol.hh"
+
+#include "client/game.hh"
+#include "client/glfw.hh"
+#include "client/globals.hh"
+#include "client/gui_screen.hh"
+#include "client/keybind.hh"
+#include "client/language.hh"
+#include "client/session.hh"
+#include "client/settings.hh"
+#include "client/sound.hh"
+#include "client/sound_effect.hh"
+
+constexpr static ImGuiWindowFlags WINDOW_FLAGS = ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoDecoration;
+constexpr static unsigned int MAX_HISTORY_SIZE = 128U;
+
+struct GuiChatMessage final {
+    std::uint64_t spawn;
+    std::string text;
+    ImVec4 color;
+};
+
+static ConfigKeyBind key_chat(GLFW_KEY_ENTER);
+static ConfigUnsigned history_size(32U, 0U, MAX_HISTORY_SIZE);
+
+static std::deque<GuiChatMessage> history;
+static std::string chat_input;
+static bool needs_focus;
+
+static resource_ptr<SoundEffect> sfx_chat_message;
+
+static void append_text_message(const std::string& sender, const std::string& text)
+{
+    GuiChatMessage message;
+    message.spawn = globals::curtime;
+    message.text = std::format("<{}> {}", sender, text);
+    message.color = ImGui::GetStyleColorVec4(ImGuiCol_Text);
+    history.push_back(message);
+
+    if(sfx_chat_message && session::is_ingame()) {
+        sound::play_ui(sfx_chat_message, false, 1.0f);
+    }
+}
+
+static void append_player_join(const std::string& sender)
+{
+    GuiChatMessage message;
+    message.spawn = globals::curtime;
+    message.text = std::format("{} {}", sender, language::resolve("chat.client_join"));
+    message.color = ImGui::GetStyleColorVec4(ImGuiCol_DragDropTarget);
+    history.push_back(message);
+
+    if(sfx_chat_message && session::is_ingame()) {
+        sound::play_ui(sfx_chat_message, false, 1.0f);
+    }
+}
+
+static void append_player_leave(const std::string& sender, const std::string& reason)
+{
+    GuiChatMessage message;
+    message.spawn = globals::curtime;
+    message.text = std::format("{} {} ({})", sender, language::resolve("chat.client_left"), language::resolve(reason.c_str()));
+    message.color = ImGui::GetStyleColorVec4(ImGuiCol_DragDropTarget);
+    history.push_back(message);
+
+    if(sfx_chat_message && session::is_ingame()) {
+        sound::play_ui(sfx_chat_message, false, 1.0f);
+    }
+}
+
+static void on_chat_message_packet(const protocol::ChatMessage& packet)
+{
+    if(packet.type == protocol::ChatMessage::TEXT_MESSAGE) {
+        append_text_message(packet.sender, packet.message);
+        return;
+    }
+
+    if(packet.type == protocol::ChatMessage::PLAYER_JOIN) {
+        append_player_join(packet.sender);
+        return;
+    }
+
+    if(packet.type == protocol::ChatMessage::PLAYER_LEAVE) {
+        append_player_leave(packet.sender, packet.message);
+        return;
+    }
+}
+
+static void on_glfw_key(const GlfwKeyEvent& event)
+{
+    if(event.action == GLFW_PRESS) {
+        if((event.key == GLFW_KEY_ENTER) && (globals::gui_screen == GUI_CHAT)) {
+            if(!strtools::is_whitespace(chat_input)) {
+                protocol::ChatMessage packet;
+                packet.type = protocol::ChatMessage::TEXT_MESSAGE;
+                packet.sender = client_game::username.get();
+                packet.message = chat_input;
+
+                protocol::send(session::peer, protocol::encode(packet));
+            }
+
+            globals::gui_screen = GUI_SCREEN_NONE;
+
+            chat_input.clear();
+
+            return;
+        }
+
+        if((event.key == GLFW_KEY_ESCAPE) && (globals::gui_screen == GUI_CHAT)) {
+            globals::gui_screen = GUI_SCREEN_NONE;
+            return;
+        }
+
+        if(key_chat.equals(event.key) && !globals::gui_screen) {
+            globals::gui_screen = GUI_CHAT;
+            needs_focus = true;
+            return;
+        }
+    }
+}
+
+void client_chat::init(void)
+{
+    globals::client_config.add_value("chat.key", key_chat);
+    globals::client_config.add_value("chat.history_size", history_size);
+
+    settings::add_keybind(2, key_chat, settings_location::KEYBOARD_MISC, "key.chat");
+    settings::add_slider(1, history_size, settings_location::VIDEO_GUI, "chat.history_size", false);
+
+    globals::dispatcher.sink<protocol::ChatMessage>().connect<&on_chat_message_packet>();
+    globals::dispatcher.sink<GlfwKeyEvent>().connect<&on_glfw_key>();
+
+    sfx_chat_message = resource::load<SoundEffect>("sounds/ui/chat_message.wav");
+}
+
+void client_chat::init_late(void)
+{
+}
+
+void client_chat::deinit(void)
+{
+    sfx_chat_message = nullptr;
+}
+
+void client_chat::update(void)
+{
+    while(history.size() > history_size.get_value()) {
+        history.pop_front();
+    }
+}
+
+void client_chat::layout(void)
+{
+    auto viewport = ImGui::GetMainViewport();
+    auto window_start = ImVec2(0.0f, 0.0f);
+    auto window_size = ImVec2(0.75f * viewport->Size.x, viewport->Size.y);
+
+    ImGui::SetNextWindowPos(window_start);
+    ImGui::SetNextWindowSize(window_size);
+
+    ImGui::PushFont(globals::font_chat);
+
+    if(!ImGui::Begin("###chat", nullptr, WINDOW_FLAGS)) {
+        ImGui::End();
+        return;
+    }
+
+    auto& padding = ImGui::GetStyle().FramePadding;
+    auto& spacing = ImGui::GetStyle().ItemSpacing;
+    auto font = ImGui::GetFont();
+
+    auto draw_list = ImGui::GetWindowDrawList();
+
+    // The text input widget occupies the bottom part
+    // of the chat window, we need to reserve some space for it
+    auto ypos = window_size.y - 2.5f * font->FontSize - 2.0f * padding.y - 2.0f * spacing.y;
+
+    if(globals::gui_screen == GUI_CHAT) {
+        if(needs_focus) {
+            ImGui::SetKeyboardFocusHere();
+            needs_focus = false;
+        }
+
+        ImGui::SetNextItemWidth(window_size.x + 32.0f * padding.x);
+        ImGui::SetCursorScreenPos(ImVec2(padding.x, ypos));
+        ImGui::InputText("###chat.input", &chat_input);
+    }
+
+    if(!client_game::hide_hud && ((globals::gui_screen == GUI_SCREEN_NONE) || (globals::gui_screen == GUI_CHAT))) {
+        for(auto it = history.crbegin(); it < history.crend(); ++it) {
+            auto text_size = ImGui::CalcTextSize(it->text.c_str(), it->text.c_str() + it->text.size(), false, window_size.x);
+            auto rect_size = ImVec2(window_size.x, text_size.y + 2.0f * padding.y);
+
+            auto rect_pos = ImVec2(padding.x, ypos - text_size.y - 2.0f * padding.y);
+            auto rect_end = ImVec2(rect_pos.x + rect_size.x, rect_pos.y + rect_size.y);
+            auto text_pos = ImVec2(rect_pos.x + padding.x, rect_pos.y + padding.y);
+
+            auto fadeout_seconds = 10.0f;
+            auto fadeout = std::exp(-1.0f * std::pow(1.0e-6 * static_cast<float>(globals::curtime - it->spawn) / fadeout_seconds, 10.0f));
+
+            float rect_alpha;
+            float text_alpha;
+
+            if(globals::gui_screen == GUI_CHAT) {
+                rect_alpha = 0.75f;
+                text_alpha = 1.00f;
+            } else {
+                rect_alpha = 0.50f * fadeout;
+                text_alpha = 1.00f * fadeout;
+            }
+
+            auto rect_col = ImGui::GetColorU32(ImGuiCol_FrameBg, rect_alpha);
+            auto text_col = ImGui::GetColorU32(ImVec4(it->color.x, it->color.y, it->color.z, it->color.w * text_alpha));
+
+            draw_list->AddRectFilled(rect_pos, rect_end, rect_col);
+            draw_list->AddText(
+                font, font->FontSize, text_pos, text_col, it->text.c_str(), it->text.c_str() + it->text.size(), window_size.x);
+
+            ypos -= rect_size.y;
+        }
+    }
+
+    ImGui::End();
+    ImGui::PopFont();
+}
+
+void client_chat::clear(void)
+{
+    history.clear();
+}
+
+void client_chat::refresh_timings(void)
+{
+    for(auto it = history.begin(); it < history.end(); ++it) {
+        // Reset the spawn time so the fadeout timer
+        // is reset; SpawnPlayer handler might call this
+        it->spawn = globals::curtime;
+    }
+}
+
+void client_chat::print(const std::string& text)
+{
+    GuiChatMessage message = {};
+    message.spawn = globals::curtime;
+    message.text = text;
+    message.color = ImGui::GetStyleColorVec4(ImGuiCol_Text);
+    history.push_back(message);
+
+    if(sfx_chat_message && session::is_ingame()) {
+        sound::play_ui(sfx_chat_message, false, 1.0f);
+    }
+}