network_chat_gui.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#include "../stdafx.h"
#include "../strings_func.h"
#include "../autocompletion.h"
#include "../blitter/factory.hpp"
#include "../console_func.h"
#include "../video/video_driver.hpp"
#include "../querystring_gui.h"
#include "../town.h"
#include "../window_func.h"
#include "../toolbar_gui.h"
#include "../zoom_func.h"
#include "../timer/timer.h"
#include "../timer/timer_window.h"
#include "network.h"
#include "network_client.h"
#include "network_base.h"
 
#include "../widgets/network_chat_widget.h"
 
#include "table/strings.h"
 
#include "../safeguards.h"

static const uint NETWORK_CHAT_LINE_SPACING = 3;

struct ChatMessage {
  std::string message; 
  ExtendedTextColour colour;  
  std::chrono::steady_clock::time_point remove_time; 
};
 
/* used for chat window */
static std::deque<ChatMessage> _chatmsg_list; 
static bool _chatmessage_dirty = false;   
static bool _chatmessage_visible = false; 
static uint MAX_CHAT_MESSAGES = 0;        

static std::chrono::steady_clock::time_point _chatmessage_dirty_time;

static PointDimension _chatmsg_box;
static ReusableBuffer<uint8_t> _chatmessage_backup; 

static inline bool HaveChatMessages(bool show_all)
{
  if (show_all) return !_chatmsg_list.empty();
 
  auto now = std::chrono::steady_clock::now();
  for (auto &cmsg : _chatmsg_list) {
    if (cmsg.remove_time >= now) return true;
  }
 
  return false;
}

void CDECL NetworkAddChatMessage(ExtendedTextColour colour, uint duration, const std::string &message)
{
  if (_chatmsg_list.size() == MAX_CHAT_MESSAGES) {
    _chatmsg_list.pop_back();
  }
 
  _chatmsg_list.emplace_front(message, colour, std::chrono::steady_clock::now() + std::chrono::seconds(duration));
  _chatmessage_dirty_time = std::chrono::steady_clock::now();
  _chatmessage_dirty = true;
}

void NetworkReInitChatBoxSize()
{
  _chatmsg_box.y       = 3 * GetCharacterHeight(FontSize::Normal);
  _chatmsg_box.height  = MAX_CHAT_MESSAGES * (GetCharacterHeight(FontSize::Normal) + ScaleGUITrad(NETWORK_CHAT_LINE_SPACING)) + ScaleGUITrad(4);
}

void NetworkInitChatMessage()
{
  MAX_CHAT_MESSAGES    = _settings_client.gui.network_chat_box_height;
 
  _chatmsg_list.clear();
  _chatmsg_box.x       = ScaleGUITrad(10);
  _chatmsg_box.width   = _settings_client.gui.network_chat_box_width_pct * _screen.width / 100;
  NetworkReInitChatBoxSize();
  _chatmessage_visible = false;
}

void NetworkUndrawChatMessage()
{
  /* Sometimes we also need to hide the cursor
   *   This is because both textmessage and the cursor take a shot of the
   *   screen before drawing.
   *   Now the textmessage takes its shot and paints its data before the cursor
   *   does, so in the shot of the cursor is the screen-data of the textmessage
   *   included when the cursor hangs somewhere over the textmessage. To
   *   avoid wrong repaints, we undraw the cursor in that case, and everything
   *   looks nicely ;)
   * (and now hope this story above makes sense to you ;))
   */
  if (_cursor.visible &&
      _cursor.draw_pos.x + _cursor.draw_size.x >= _chatmsg_box.x &&
      _cursor.draw_pos.x <= _chatmsg_box.x + _chatmsg_box.width &&
      _cursor.draw_pos.y + _cursor.draw_size.y >= _screen.height - _chatmsg_box.y - _chatmsg_box.height &&
      _cursor.draw_pos.y <= _screen.height - _chatmsg_box.y) {
    UndrawMouseCursor();
  }
 
  if (_chatmessage_visible) {
    Blitter *blitter = BlitterFactory::GetCurrentBlitter();
    int x      = _chatmsg_box.x;
    int y      = _screen.height - _chatmsg_box.y - _chatmsg_box.height;
    int width  = _chatmsg_box.width;
    int height = _chatmsg_box.height;
    if (y < 0) {
      height = std::max(height + y, std::min(_chatmsg_box.height, _screen.height));
      y = 0;
    }
    if (x + width >= _screen.width) {
      width = _screen.width - x;
    }
    if (width <= 0 || height <= 0) return;
 
    _chatmessage_visible = false;
    /* Put our 'shot' back to the screen */
    blitter->CopyFromBuffer(blitter->MoveTo(_screen.dst_ptr, x, y), _chatmessage_backup.GetBuffer(), width, height);
    /* And make sure it is updated next time */
    VideoDriver::GetInstance()->MakeDirty(x, y, width, height);
 
    _chatmessage_dirty_time = std::chrono::steady_clock::now();
    _chatmessage_dirty = true;
  }
}

static const IntervalTimer<TimerWindow> network_message_expired_interval(std::chrono::seconds(1), [](auto) {
  auto now = std::chrono::steady_clock::now();
  for (auto &cmsg : _chatmsg_list) {
    /* Message has expired, remove from the list */
    if (now > cmsg.remove_time && _chatmessage_dirty_time < cmsg.remove_time) {
      _chatmessage_dirty_time = now;
      _chatmessage_dirty = true;
      break;
    }
  }
});

void NetworkDrawChatMessage()
{
  Blitter *blitter = BlitterFactory::GetCurrentBlitter();
  if (!_chatmessage_dirty) return;
 
  const Window *w = FindWindowByClass(WindowClass::NetworkChat);
  bool show_all = (w != nullptr);
 
  /* First undraw if needed */
  NetworkUndrawChatMessage();
 
  if (_iconsole_mode == ICONSOLE_FULL) return;
 
  /* Check if we have anything to draw at all */
  if (!HaveChatMessages(show_all)) return;
 
  int x      = _chatmsg_box.x;
  int y      = _screen.height - _chatmsg_box.y - _chatmsg_box.height;
  int width  = _chatmsg_box.width;
  int height = _chatmsg_box.height;
  if (y < 0) {
    height = std::max(height + y, std::min(_chatmsg_box.height, _screen.height));
    y = 0;
  }
  if (x + width >= _screen.width) {
    width = _screen.width - x;
  }
  if (width <= 0 || height <= 0) return;
 
  /* Make a copy of the screen as it is before painting (for undraw) */
  uint8_t *buffer = _chatmessage_backup.Allocate(BlitterFactory::GetCurrentBlitter()->BufferSize(width, height));
  blitter->CopyToBuffer(blitter->MoveTo(_screen.dst_ptr, x, y), buffer, width, height);
 
  _cur_dpi = &_screen; // switch to _screen painting
 
  auto now = std::chrono::steady_clock::now();
  int string_height = 0;
  for (auto &cmsg : _chatmsg_list) {
    if (!show_all && cmsg.remove_time < now) continue;
    string_height += GetStringLineCount(GetString(STR_JUST_RAW_STRING, cmsg.message), width - 1) * GetCharacterHeight(FontSize::Normal) + NETWORK_CHAT_LINE_SPACING;
  }
 
  string_height = std::min<uint>(string_height, MAX_CHAT_MESSAGES * (GetCharacterHeight(FontSize::Normal) + NETWORK_CHAT_LINE_SPACING));
 
  int top = _screen.height - _chatmsg_box.y - string_height - 2;
  int bottom = _screen.height - _chatmsg_box.y - 2;
  /* Paint a half-transparent box behind the chat messages */
  GfxFillRect(_chatmsg_box.x, top - 2, _chatmsg_box.x + _chatmsg_box.width - 1, bottom,
      PALETTE_TO_TRANSPARENT, FillRectMode::Recolour // black, but with some alpha for background
    );
 
  /* Paint the chat messages starting with the lowest at the bottom */
  int ypos = bottom - 2;
 
  for (auto &cmsg : _chatmsg_list) {
    if (!show_all && cmsg.remove_time < now) continue;
    ypos = DrawStringMultiLine(_chatmsg_box.x + ScaleGUITrad(3), _chatmsg_box.x + _chatmsg_box.width - 1, top, ypos, cmsg.message, cmsg.colour, SA_LEFT | SA_BOTTOM | SA_FORCE) - NETWORK_CHAT_LINE_SPACING;
    if (ypos < top) break;
  }
 
  /* Make sure the data is updated next flush */
  VideoDriver::GetInstance()->MakeDirty(x, y, width, height);
 
  _chatmessage_visible = true;
  _chatmessage_dirty = false;
}

static void SendChat(std::string_view buf, NetworkChatDestinationType type, int dest)
{
  if (buf.empty()) return;
 
  NetworkAction action;
  switch (type) {
    case NetworkChatDestinationType::Broadcast: action = NetworkAction::ChatBroadcast; break;
    case NetworkChatDestinationType::Team: action = NetworkAction::ChatTeam; break;
    case NetworkChatDestinationType::Client: action = NetworkAction::ChatClient; break;
    default: NOT_REACHED();
  }
 
  if (!_network_server) {
    MyClient::SendChat(action, type, dest, buf, 0);
  } else {
    NetworkServerSendChat(action, type, dest, buf, CLIENT_ID_SERVER);
  }
}

class NetworkChatAutoCompletion final : public AutoCompletion {
public:
  using AutoCompletion::AutoCompletion;
 
private:
  std::vector<std::string> GetSuggestions([[maybe_unused]] std::string_view prefix, std::string_view query) override
  {
    std::vector<std::string> suggestions;
    for (NetworkClientInfo *ci : NetworkClientInfo::Iterate()) {
      if (ci->client_name.starts_with(query)) {
        suggestions.push_back(ci->client_name);
      }
    }
    for (const Town *t : Town::Iterate()) {
      /* Get the town-name via the string-system */
      std::string town_name = GetString(STR_TOWN_NAME, t->index);
      if (town_name.starts_with(query)) {
        suggestions.push_back(std::move(town_name));
      }
    }
    return suggestions;
  }
 
  void ApplySuggestion(std::string_view prefix, std::string_view suggestion) override
  {
    /* Add ': ' if we are at the start of the line (pretty) */
    if (prefix.empty()) {
      this->textbuf->Assign(fmt::format("{}: ", suggestion));
    } else {
      this->textbuf->Assign(fmt::format("{}{} ", prefix, suggestion));
    }
  }
};

struct NetworkChatWindow : public Window {
  NetworkChatDestinationType dtype{}; 
  int dest = 0; 
  QueryString message_editbox; 
  NetworkChatAutoCompletion chat_tab_completion; 

  NetworkChatWindow(WindowDesc &desc, NetworkChatDestinationType type, int dest)
      : Window(desc), dtype(type), dest(dest), message_editbox(NETWORK_CHAT_LENGTH), chat_tab_completion(&message_editbox.text)
  {
    this->querystrings[WID_NC_TEXTBOX] = &this->message_editbox;
    this->message_editbox.cancel_button = WID_NC_CLOSE;
    this->message_editbox.ok_button = WID_NC_SENDBUTTON;
 
    this->CreateNestedTree();
    this->FinishInitNested(type);
 
    this->SetFocusedWidget(WID_NC_TEXTBOX);
    InvalidateWindowData(WindowClass::News, 0, this->height);
 
    PositionNetworkChatWindow(this);
  }
 
  void Close([[maybe_unused]] int data = 0) override
  {
    InvalidateWindowData(WindowClass::News, 0, 0);
    this->Window::Close();
  }
 
  void FindWindowPlacementAndResize(int, int def_height, bool allow_resize) override
  {
    Window::FindWindowPlacementAndResize(_toolbar_width, def_height, allow_resize);
  }

  void ChatTabCompletion()
  {
    if (this->chat_tab_completion.AutoComplete()) {
      this->SetDirty();
    }
  }
 
  Point OnInitialPosition([[maybe_unused]] int16_t sm_width, [[maybe_unused]] int16_t sm_height, [[maybe_unused]] int window_number) override
  {
    Point pt = { 0, _screen.height - sm_height - FindWindowById(WindowClass::Statusbar, 0)->height };
    return pt;
  }
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    if (widget != WID_NC_DESTINATION) return this->Window::GetWidgetString(widget, stringid);
 
    if (this->dtype == NetworkChatDestinationType::Client) {
      return GetString(STR_NETWORK_CHAT_CLIENT_CAPTION, NetworkClientInfo::GetByClientID(static_cast<ClientID>(this->dest))->client_name);
    }
 
    return GetString(this->dtype == NetworkChatDestinationType::Broadcast ? STR_NETWORK_CHAT_ALL_CAPTION : STR_NETWORK_CHAT_COMPANY_CAPTION);
  }
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      case WID_NC_SENDBUTTON: /* Send */
        SendChat(this->message_editbox.text.GetText(), this->dtype, this->dest);
        [[fallthrough]];
 
      case WID_NC_CLOSE: /* Cancel */
        this->Close();
        break;
    }
  }
 
  EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
  {
    EventState state = ES_NOT_HANDLED;
    if (keycode == WKC_TAB) {
      ChatTabCompletion();
      state = ES_HANDLED;
    }
    return state;
  }
 
  void OnEditboxChanged(WidgetID widget) override
  {
    if (widget == WID_NC_TEXTBOX) {
      this->chat_tab_completion.Reset();
    }
  }

  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
  {
    if (data == this->dest) this->Close();
  }
};

static constexpr std::initializer_list<NWidgetPart> _nested_chat_window_widgets = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, Colours::Grey, WID_NC_CLOSE),
    NWidget(WWT_PANEL, Colours::Grey, WID_NC_BACKGROUND),
      NWidget(NWID_HORIZONTAL),
        NWidget(WWT_TEXT, Colours::Invalid, WID_NC_DESTINATION), SetMinimalSize(62, 12), SetPadding(1, 0, 1, 0), SetAlignment(SA_VERT_CENTER | SA_RIGHT),
        NWidget(WWT_EDITBOX, Colours::Grey, WID_NC_TEXTBOX), SetMinimalSize(100, 0), SetPadding(1, 0, 1, 0), SetResize(1, 0),
                                  SetStringTip(STR_NETWORK_CHAT_OSKTITLE),
        NWidget(WWT_PUSHTXTBTN, Colours::Grey, WID_NC_SENDBUTTON), SetMinimalSize(62, 12), SetPadding(1, 0, 1, 0), SetStringTip(STR_NETWORK_CHAT_SEND),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};

static WindowDesc _chat_window_desc(
  WindowPosition::Manual, {}, 0, 0,
  WindowClass::NetworkChat, WindowClass::None,
  {},
  _nested_chat_window_widgets
);
 

void ShowNetworkChatQueryWindow(NetworkChatDestinationType type, int dest)
{
  CloseWindowByClass(WindowClass::NetworkChat);
  new NetworkChatWindow(_chat_window_desc, type, dest);
}