dolphin/Source/Core/VideoCommon/NetPlayChatUI.cpp

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// Copyright 2019 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
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#include "VideoCommon/NetPlayChatUI.h"
#include <imgui.h>
constexpr float DEFAULT_WINDOW_WIDTH = 220.0f;
constexpr float DEFAULT_WINDOW_HEIGHT = 400.0f;
constexpr size_t MAX_BACKLOG_SIZE = 100;
std::unique_ptr<NetPlayChatUI> g_netplay_chat_ui;
NetPlayChatUI::NetPlayChatUI(std::function<void(const std::string&)> callback)
: m_message_callback{std::move(callback)}
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{
}
NetPlayChatUI::~NetPlayChatUI() = default;
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void NetPlayChatUI::Display()
{
const float scale = ImGui::GetIO().DisplayFramebufferScale.x;
ImGui::SetNextWindowPos(ImVec2(10.0f * scale, 10.0f * scale), ImGuiCond_FirstUseEver);
ImGui::SetNextWindowSizeConstraints(
ImVec2(DEFAULT_WINDOW_WIDTH * scale, DEFAULT_WINDOW_HEIGHT * scale),
ImGui::GetIO().DisplaySize);
if (!ImGui::Begin("Chat", nullptr, ImGuiWindowFlags_None))
{
ImGui::End();
return;
}
ImGui::BeginChild("Scrolling", ImVec2(0, -30 * scale), true, ImGuiWindowFlags_None);
for (const auto& msg : m_messages)
{
auto c = msg.second;
ImGui::PushTextWrapPos(0.0f);
ImGui::TextColored(ImVec4(c[0], c[1], c[2], 1.0f), "%s", msg.first.c_str());
ImGui::PopTextWrapPos();
}
if (m_scroll_to_bottom)
{
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ImGui::SetScrollHereY(1.0f);
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m_scroll_to_bottom = false;
}
m_is_scrolled_to_bottom = ImGui::GetScrollY() == ImGui::GetScrollMaxY();
ImGui::EndChild();
ImGui::Spacing();
ImGui::PushItemWidth(-50.0f * scale);
if (ImGui::InputText("##NetplayMessageBuffer", m_message_buf, IM_ARRAYSIZE(m_message_buf),
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ImGuiInputTextFlags_EnterReturnsTrue))
{
SendMessage();
}
if (m_activate)
{
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ImGui::SetKeyboardFocusHere(-1);
m_activate = false;
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}
ImGui::PopItemWidth();
ImGui::SameLine();
if (ImGui::Button("Send"))
SendMessage();
ImGui::End();
}
void NetPlayChatUI::AppendChat(std::string message, Color color)
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{
if (m_messages.size() > MAX_BACKLOG_SIZE)
m_messages.pop_front();
m_messages.emplace_back(std::move(message), color);
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// Only scroll to bottom, if we were at the bottom previously
if (m_is_scrolled_to_bottom)
m_scroll_to_bottom = true;
}
void NetPlayChatUI::SendMessage()
{
// Check whether the input field is empty
if (m_message_buf[0] != '\0')
{
if (m_message_callback)
m_message_callback(m_message_buf);
// 'Empty' the buffer
m_message_buf[0] = '\0';
}
}
void NetPlayChatUI::Activate()
{
if (ImGui::IsItemFocused())
ImGui::SetWindowFocus(nullptr);
else
m_activate = true;
}