palladium/pd/ui7/source/menu.cpp

/*
MIT License

Copyright (c) 2024 - 2025 tobid7

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of this software and associated documentation files (the "Software"), to deal
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

#include <pd/ui7/containers.hpp>
#include <pd/ui7/menu.hpp>

namespace PD {
namespace UI7 {
Menu::Menu(const ID &id, IO::Ref io) : pIO(io), pID(id) {
  pLayout = Layout::New(id, io);
  TitleBarHeight = io->FontScale * 30.f;
  pLayout->WorkRect.y += TitleBarHeight;
  pLayout->CursorInit();
}

PD_UI7_API void Menu::Label(const std::string &label) {
  // Layout API
  auto r = Label::New(label, pIO);
  r->SetClipRect(fvec4(pLayout->GetPosition(), pLayout->GetSize()));
  pLayout->AddObject(r);
}

PD_UI7_API bool Menu::Button(const std::string &label) {
  bool ret = false;
  u32 id = Strings::FastHash("btn" + label +
                             std::to_string(pLayout->Objects.Size()));
  Container::Ref r = pLayout->FindObject(id);
  if (!r) {
    r = Button::New(label, pIO);
    r->SetID(id);
  }
  pLayout->AddObject(r);
  if (!r->Skippable()) {
    ret = std::static_pointer_cast<UI7::Button>(r)->IsPressed();
  }
  return ret;
}

PD_UI7_API void Menu::Checkbox(const std::string &label, bool &v) {
  u32 id = Strings::FastHash("cbx" + label +
                             std::to_string(pLayout->Objects.Size()));
  Container::Ref r = pLayout->FindObject(id);
  if (!r) {
    r = Checkbox::New(label, v, pIO);
    r->SetID(id);
  }
  pLayout->AddObject(r);
}

PD_UI7_API void Menu::Image(Li::Texture::Ref img, fvec2 size, Li::Rect uv) {
  Container::Ref r = Image::New(img, size, uv);
  pLayout->AddObject(r);
}

PD_UI7_API void Menu::Separator() {
  // Dynamic Objects are very simple...
  Container::Ref r = DynObj::New(
      [=, this](UI7::IO::Ref io, Li::DrawList::Ref l, UI7::Container *self) {
        l->DrawRectFilled(self->FinalPos(), self->GetSize(),
                          pIO->Theme->Get(UI7Color_TextDead));
      });
  // Set size before pushing (cause Cursor Move will require it)
  r->SetSize(fvec2(pLayout->Size.x - 10, 1));
  pLayout->AddObject(r);
}

PD_UI7_API void Menu::SeparatorText(const std::string &label) {
  // Also note to use [=] instead of [&] to not undefined access label
  Container::Ref r = DynObj::New([=, this](UI7::IO::Ref io, Li::DrawList::Ref l,
                                           UI7::Container *self) {
    fvec2 size = self->GetSize();
    fvec2 tdim = io->Font->GetTextBounds(label, io->FontScale);
    fvec2 pos = self->FinalPos();
    auto align = pLayout->GetAlignment();
    vec2 rpos = pLayout->AlignPosition(
        pos, tdim, fvec4(pLayout->Pos, pLayout->Size), align);
    if (!(align & UI7Align_Left)) {
      l->DrawRectFilled(fvec2(rpos.x + io->FramePadding.x, tdim.y * 0.5),
                        fvec2(pos.x - rpos.x - io->MenuPadding.x, 1),
                        io->Theme->Get(UI7Color_TextDead));
    }
    if (!(align & UI7Align_Right)) {
      l->DrawRectFilled(pos + fvec2(tdim.x + io->FramePadding.x, tdim.y * 0.5),
                        fvec2(size.x - tdim.x - io->MenuPadding.x, 1),
                        io->Theme->Get(UI7Color_TextDead));
    }
    l->DrawTextEx(rpos, label, io->Theme->Get(UI7Color_Text), 0,
                  fvec2(pLayout->Size.x, self->GetSize().y));
  });
  // Set size before pushing (cause Cursor Move will require it)
  r->SetSize(
      fvec2(pLayout->Size.x - 10, pIO->Font->PixelHeight * pIO->FontScale));
  pLayout->AddObject(r);
}
PD_UI7_API void Menu::HandleFocus() {
  // Check if menu can be focused for Selective Menu Input API
  vec4 newarea = fvec4(pLayout->Pos, pLayout->Size);
  if (!pIsOpen) {
    newarea = fvec4(pLayout->Pos, fvec2(pLayout->Size.x, TitleBarHeight));
  }
  if ((Hid::IsDown(Hid::Key::Touch) ||
       Hid::IsEvent(Hid::Event::Event_Down, HidKb::Kb_MouseLeft)) &&
      Li::Renderer::InBox(Hid::MousePos(), newarea) &&
      !Li::Renderer::InBox(Hid::MousePos(),
                           pIO->InputHandler->FocusedMenuRect)) {
    pIO->InputHandler->FocusedMenu = pID;
  }
  if (pIO->InputHandler->FocusedMenu == pID) {
    pIO->InputHandler->FocusedMenuRect = newarea;
  }
}

/** Todo: (func name is self describing) */
PD_UI7_API void Menu::HandleScrolling() {
  if (Flags & UI7MenuFlags_VtScrolling) {
    bool allowed =
        pLayout->MaxPosition.y > (pLayout->WorkRect.w - pLayout->WorkRect.y);
    if (allowed) {
      if (PD::Hid::IsDown(PD::Hid::Key::Touch)) {
        pLayout->ScrollStart = pLayout->ScrollOffset;
      }
      if (pIO->InputHandler->DragObject(
              "sbg" + pID.pName,
              fvec4(pLayout->Pos, fvec2(0.f)) + pLayout->WorkRect)) {
        if (pIO->InputHandler->DragReleasedAW) {
        } else {
          pLayout->ScrollOffset.y = std::clamp(
              pLayout->ScrollStart.y + pIO->InputHandler->DragSourcePos.y -
                  pIO->InputHandler->DragPosition.y,
              20.f, pLayout->MaxPosition.y - 220);
        }
      }
    } else {
      pLayout->ScrollOffset.y = 0.f;
    }

    if (pLayout->ScrollOffset.y > pLayout->MaxPosition.y - 240) {
      pLayout->ScrollOffset.y -= 1.5;
      if (pLayout->ScrollOffset.y < pLayout->MaxPosition.y - 240) {
        pLayout->ScrollOffset.y = pLayout->MaxPosition.y - 240;
      }
    }
    if (pLayout->ScrollOffset.y < 0) {
      pLayout->ScrollOffset.y += 1.5;
      if (pLayout->ScrollOffset.y > 0) {
        pLayout->ScrollOffset.y = 0;
      }
    }
  }
}

PD_UI7_API void Menu::HandleTitlebarActions() {
  // Collapse
  if (!(Flags & UI7MenuFlags_NoCollapse)) {
    vec2 cpos = pLayout->Pos + pIO->FramePadding;
    // clr_collapse_tri = UI7Color_FrameBackground;
    if (pIO->InputHandler->DragObject(UI7::ID(pID.GetName() + "clbse"),
                                      fvec4(cpos, fvec2(18, TitleBarHeight)))) {
      if (pIO->InputHandler->DragReleased) {
        pIsOpen = !pIsOpen;
      }
      // clr_collapse_tri = UI7Color_FrameBackgroundHovered;
    }
  }
  // Close Logic
  if (!(Flags & UI7MenuFlags_NoClose) && pIsShown != nullptr) {
    vec2 cpos =
        fvec2(pLayout->Pos.x + pLayout->Size.x - 12 - pIO->FramePadding.x,
              pLayout->Pos.y + pIO->FramePadding.y);

    // clr_close_btn = UI7Color_FrameBackground;
    if (pIO->InputHandler->DragObject(UI7::ID(pID.GetName() + "clse"),
                                      fvec4(cpos, fvec2(12)))) {
      if (pIO->InputHandler->DragReleased) {
        *pIsShown = !(*pIsShown);
      }
      // clr_close_btn = UI7Color_FrameBackgroundHovered;
    }
  }
  // Resize logic
  if (!(Flags & UI7MenuFlags_NoResize)) {
    vec2 cpos = pLayout->Pos + pLayout->Size - fvec2(20);

    // clr_close_btn = UI7Color_FrameBackground;
    if (pIO->InputHandler->DragObject(UI7::ID(pID.GetName() + "rszs"),
                                      fvec4(cpos, fvec2(20)))) {
      fvec2 szs = pLayout->Size + (pIO->InputHandler->DragPosition -
                                   pIO->InputHandler->DragLastPosition);
      if (szs.x < 30) szs.x = 30;
      if (szs.y < 30) szs.y = 30;
      pLayout->Size = szs;
      // clr_close_btn = UI7Color_FrameBackgroundHovered;
    }
  }
  // Menu Movement
  if (!(Flags & UI7MenuFlags_NoMove)) {
    if (pIO->InputHandler->DragObject(
            pID.GetName() + "tmv",
            fvec4(pLayout->Pos, fvec2(pLayout->Size.x, TitleBarHeight)))) {
      if (pIO->InputHandler->DragDoubleRelease) {
        pIsOpen = !pIsOpen;
      }
      pLayout->Pos = pLayout->Pos + (pIO->InputHandler->DragPosition -
                                     pIO->InputHandler->DragLastPosition);
      // Keep Window In Viewport
      // Maybe i need to add some operators to vec
      pLayout->Pos.x = std::clamp<float>(pLayout->Pos.x, -pLayout->Size.x + 10,
                                         pIO->CurrentViewPort.z - 10);
      pLayout->Pos.y = std::clamp<float>(pLayout->Pos.y, pIO->CurrentViewPort.y,
                                         pIO->CurrentViewPort.w - 10);
    }
  }
}

PD_UI7_API void Menu::DrawBaseLayout() {
  if (pIsOpen) {
    /** Resize Sym (Render on Top of Everything) */
    if (!(Flags & UI7MenuFlags_NoResize)) {
      Container::Ref r = DynObj::New(
          [](IO::Ref io, Li::DrawList::Ref l, UI7::Container *self) {
            l->Layer = 1;
            l->PathAdd(self->FinalPos() + self->GetSize() - fvec2(0, 20));
            l->PathAdd(self->FinalPos() + self->GetSize());
            l->PathAdd(self->FinalPos() + self->GetSize() - fvec2(20, 0));
            l->PathFill(io->Theme->Get(UI7Color_Button));
          });
      r->SetSize(
          fvec2(pLayout->GetSize().x, pLayout->GetSize().y - TitleBarHeight));
      r->SetPos(fvec2(0, TitleBarHeight));
      pLayout->AddObjectEx(r,
                           UI7LytAdd_NoCursorUpdate | UI7LytAdd_NoScrollHandle);
    }

    /** Background */
    Container::Ref r = DynObj::New([](IO::Ref io, Li::DrawList::Ref l,
                                      UI7::Container *self) {
      l->Layer = 0;
      l->PathRectEx(self->FinalPos(), self->FinalPos() + self->GetSize(), 10.f,
                    LiPathRectFlags_KeepTop | LiPathRectFlags_KeepBot);
      l->PathFill(io->Theme->Get(UI7Color_Background));
      /*l->DrawRectFilled(self->FinalPos(), self->GetSize(),
                        io->Theme->Get(UI7Color_Background));*/
    });
    // Set size before pushing (cause Cursor Move will require it)
    r->SetSize(
        fvec2(pLayout->GetSize().x, pLayout->GetSize().y - TitleBarHeight));
    r->SetPos(fvec2(0, TitleBarHeight));
    pLayout->AddObjectEx(r, UI7LytAdd_NoCursorUpdate |
                                UI7LytAdd_NoScrollHandle | UI7LytAdd_Front);
  }
  if (!(Flags & UI7MenuFlags_NoTitlebar)) {
    Container::Ref r = DynObj::New(
        [=, this](UI7::IO::Ref io, Li::DrawList::Ref l, UI7::Container *self) {
          l->Layer = 20;
          /** Header Bar */
          l->DrawRectFilled(self->FinalPos(), self->GetSize(),
                            io->Theme->Get(UI7Color_Header));
          l->Layer = 21;
          /** Inline if statement to shift the Text if collapse sym is shown */
          /** What the hell is this code btw (didn't found a better way) */
          l->DrawText(self->FinalPos() + fvec2(Flags & UI7MenuFlags_NoClose
                                                   ? 0
                                                   : (TitleBarHeight -
                                                      pIO->FramePadding.y * 2 +
                                                      (io->FramePadding.x * 2)),
                                               0),
                      pID.GetName(), io->Theme->Get(UI7Color_Text));
        });
    r->SetSize(fvec2(pLayout->GetSize().x, TitleBarHeight));
    r->SetPos(0);
    pLayout->AddObjectEx(r,
                         UI7LytAdd_NoCursorUpdate | UI7LytAdd_NoScrollHandle);

    /** Collapse Sym */
    if (!(Flags & UI7MenuFlags_NoCollapse)) {
      r = DynObj::New([=, this](UI7::IO::Ref io, Li::DrawList::Ref l,
                                UI7::Container *self) {
        /** This sym actually requires layer 21 (i dont know why) */
        l->Layer = 21;
        /**
         * Symbol (Position Swapping set by pIsOpen ? openpos : closepos;)
         */
        l->DrawTriangleFilled(
            self->FinalPos(),
            self->FinalPos() +
                fvec2(self->GetSize().x, pIsOpen ? 0 : self->GetSize().y * 0.5),
            self->FinalPos() +
                fvec2(pIsOpen ? self->GetSize().x * 0.5 : 0, self->GetSize().y),
            io->Theme->Get(UI7Color_FrameBackground));
      });
      r->SetSize(TitleBarHeight - pIO->FramePadding.y * 2);
      r->SetPos(pIO->FramePadding);
      pLayout->AddObjectEx(r,
                           UI7LytAdd_NoCursorUpdate | UI7LytAdd_NoScrollHandle);
    }
    /** Close Sym (only shown if pIsShown is not nullptr) */
    if (!(Flags & UI7MenuFlags_NoClose) && pIsShown) {
      fvec2 size = TitleBarHeight - pIO->FramePadding.y * 2;  // Fixed quad size
      // Need to clamp this way as the math lib lacks a less and greater
      // operator in vec2 (don't checked if it would make sense yet)
      size.x = std::clamp(size.x, 5.f, std::numeric_limits<float>::max());
      size.y = std::clamp(size.y, 5.f, std::numeric_limits<float>::max());
      // Probably should fix the minsize to be locked on y
      fvec2 cpos =
          fvec2(pLayout->Pos.x + pLayout->Size.x - size.x - pIO->FramePadding.x,
                pLayout->Pos.y + pIO->FramePadding.y);
      pLayout->DrawList->DrawLine(cpos, cpos + size,
                                  pIO->Theme->Get(UI7Color_FrameBackground), 2);
      pLayout->DrawList->DrawLine(cpos + fvec2(0, size.y),
                                  cpos + fvec2(size.x, 0),
                                  pIO->Theme->Get(UI7Color_FrameBackground), 2);
    }
  }
}

PD_UI7_API void Menu::Update() {
  HandleFocus();
  if (!(Flags & UI7MenuFlags_NoTitlebar)) {
    TitleBarHeight = pIO->FontScale * 30.f;
    pLayout->WorkRect.y = 5.f + TitleBarHeight;
    HandleTitlebarActions();
  } else {
    TitleBarHeight = 0.f;
    pLayout->WorkRect.y = 5.f;
  }
  if (Flags & UI7MenuFlags_VtScrolling || Flags & UI7MenuFlags_HzScrolling) {
    HandleScrolling();
  }
  DrawBaseLayout();
  pLayout->Update();
}

PD_UI7_API bool Menu::BeginTreeNode(const ID &id) {
  // As of some notes this should work:
  auto n = pTreeNodes.find(id);
  if (n == pTreeNodes.end()) {
    pTreeNodes[id] = false;
    n = pTreeNodes.find(id);
  }
  fvec2 pos = pLayout->Cursor;
  fvec2 tdim = pIO->Font->GetTextBounds(id.GetName(), pIO->FontScale);
  fvec2 szs = tdim + fvec2(pIO->ItemSpace.x + 10, 0);

  if (n->second) {
    pLayout->InitialCursorOffset += 10.f;
  }

  // Object
  auto r =
      DynObj::New([=, this](IO::Ref io, Li::DrawList::Ref l, Container *self) {
        fvec2 ts = self->FinalPos() + fvec2(0, 7);
        fvec2 pl[2] = {fvec2(10, 5), fvec2(0, 10)};
        if (n->second) {
          float t = pl[0].y;
          pl[0].y = pl[1].x;
          pl[1].x = t;
        }
        l->DrawTriangleFilled(ts, ts + pl[0], ts + pl[1],
                              io->Theme->Get(UI7Color_FrameBackground));

        l->DrawText(self->FinalPos() + fvec2(10 + io->ItemSpace.x, 0),
                    id.GetName(), io->Theme->Get(UI7Color_Text));
      });
  /** Yes this new function handler was created for tree nodes */
  r->AddInputHandler([=, this](IO::Ref io, Container *self) {
    if (io->InputHandler->DragObject(
            ID(pID.GetName() + id.GetName()),
            fvec4(self->FinalPos(), self->GetSize()))) {
      if (io->InputHandler->DragReleased) {
        n->second = !n->second;
      }
    }
  });
  r->SetPos(pos);
  r->SetSize(szs);
  /** Use Add Object as it is faster */
  pLayout->AddObject(r);

  return n->second;
}

PD_UI7_API void UI7::Menu::EndTreeNode() {
  pLayout->InitialCursorOffset.x -= 10.f;
  pLayout->Cursor.x -= 10.f;
  if (pLayout->InitialCursorOffset.x < 0.f) {
    pLayout->InitialCursorOffset.x = 0.f;
  }
}
}  // namespace UI7
}  // namespace PD