Hyprland/src/managers/input/Tablets.cpp

#include "InputManager.hpp"
#include "../../Compositor.hpp"

void CInputManager::newTabletTool(wlr_input_device* pDevice) {
    const auto PNEWTABLET = &m_lTablets.emplace_back();

    try {
        PNEWTABLET->name = deviceNameToInternalString(pDevice->name);
    } catch (std::exception& e) {
        Debug::log(ERR, "Tablet had no name???"); // logic error
    }

    PNEWTABLET->wlrTablet       = wlr_tablet_from_input_device(pDevice);
    PNEWTABLET->wlrDevice       = pDevice;
    PNEWTABLET->wlrTabletV2     = wlr_tablet_create(g_pCompositor->m_sWLRTabletManager, g_pCompositor->m_sSeat.seat, pDevice);
    PNEWTABLET->wlrTablet->data = PNEWTABLET;

    Debug::log(LOG, "Attaching tablet to cursor!");

    wlr_cursor_attach_input_device(g_pCompositor->m_sWLRCursor, pDevice);

    PNEWTABLET->hyprListener_Destroy.initCallback(
        &pDevice->events.destroy,
        [](void* owner, void* data) {
            const auto PTAB = (STablet*)owner;

            g_pInputManager->m_lTablets.remove(*PTAB);

            Debug::log(LOG, "Removed a tablet");
        },
        PNEWTABLET, "Tablet");

    PNEWTABLET->hyprListener_Axis.initCallback(
        &wlr_tablet_from_input_device(pDevice)->events.axis,
        [](void* owner, void* data) {
            const auto EVENT = (wlr_tablet_tool_axis_event*)data;
            const auto PTAB  = (STablet*)owner;

            switch (EVENT->tool->type) {
                case WLR_TABLET_TOOL_TYPE_MOUSE:
                    wlr_cursor_move(g_pCompositor->m_sWLRCursor, PTAB->wlrDevice, EVENT->dx, EVENT->dy);
                    g_pInputManager->refocus();
                    break;
                default:
                    double x = (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_X) ? EVENT->x : NAN;
                    double y = (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_Y) ? EVENT->y : NAN;
                    wlr_cursor_warp_absolute(g_pCompositor->m_sWLRCursor, PTAB->wlrDevice, x, y);
                    g_pInputManager->refocus();
                    break;
            }

            const auto PTOOL = g_pInputManager->ensureTabletToolPresent(EVENT->tool);

            // TODO: this might be wrong
            if (PTOOL->active) {
                g_pInputManager->refocus();

                g_pInputManager->focusTablet(PTAB, EVENT->tool, true);
            }

            if (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_PRESSURE)
                wlr_tablet_v2_tablet_tool_notify_pressure(PTOOL->wlrTabletToolV2, EVENT->pressure);

            if (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_DISTANCE)
                wlr_tablet_v2_tablet_tool_notify_distance(PTOOL->wlrTabletToolV2, EVENT->distance);

            if (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_ROTATION)
                wlr_tablet_v2_tablet_tool_notify_rotation(PTOOL->wlrTabletToolV2, EVENT->rotation);

            if (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_SLIDER)
                wlr_tablet_v2_tablet_tool_notify_slider(PTOOL->wlrTabletToolV2, EVENT->slider);

            if (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_WHEEL)
                wlr_tablet_v2_tablet_tool_notify_wheel(PTOOL->wlrTabletToolV2, EVENT->wheel_delta, 0);

            if (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_TILT_X)
                PTOOL->tiltX = EVENT->tilt_x;

            if (EVENT->updated_axes & WLR_TABLET_TOOL_AXIS_TILT_Y)
                PTOOL->tiltY = EVENT->tilt_y;

            if (EVENT->updated_axes & (WLR_TABLET_TOOL_AXIS_TILT_X | WLR_TABLET_TOOL_AXIS_TILT_Y))
                wlr_tablet_v2_tablet_tool_notify_tilt(PTOOL->wlrTabletToolV2, PTOOL->tiltX, PTOOL->tiltY);
        },
        PNEWTABLET, "Tablet");

    PNEWTABLET->hyprListener_Tip.initCallback(
        &wlr_tablet_from_input_device(pDevice)->events.tip,
        [](void* owner, void* data) {
            const auto EVENT = (wlr_tablet_tool_tip_event*)data;
            const auto PTAB  = (STablet*)owner;

            const auto PTOOL = g_pInputManager->ensureTabletToolPresent(EVENT->tool);

            // TODO: this might be wrong
            if (EVENT->state == WLR_TABLET_TOOL_TIP_DOWN) {
                g_pInputManager->refocus();
                g_pInputManager->focusTablet(PTAB, EVENT->tool);
                wlr_send_tablet_v2_tablet_tool_down(PTOOL->wlrTabletToolV2);
            } else {
                wlr_send_tablet_v2_tablet_tool_up(PTOOL->wlrTabletToolV2);
            }
        },
        PNEWTABLET, "Tablet");

    PNEWTABLET->hyprListener_Button.initCallback(
        &wlr_tablet_from_input_device(pDevice)->events.button,
        [](void* owner, void* data) {
            const auto EVENT = (wlr_tablet_tool_button_event*)data;

            const auto PTOOL = g_pInputManager->ensureTabletToolPresent(EVENT->tool);

            wlr_tablet_v2_tablet_tool_notify_button(PTOOL->wlrTabletToolV2, (zwp_tablet_pad_v2_button_state)EVENT->button, (zwp_tablet_pad_v2_button_state)EVENT->state);
        },
        PNEWTABLET, "Tablet");

    PNEWTABLET->hyprListener_Proximity.initCallback(
        &wlr_tablet_from_input_device(pDevice)->events.proximity,
        [](void* owner, void* data) {
            const auto EVENT = (wlr_tablet_tool_proximity_event*)data;
            const auto PTAB  = (STablet*)owner;

            const auto PTOOL = g_pInputManager->ensureTabletToolPresent(EVENT->tool);

            if (EVENT->state == WLR_TABLET_TOOL_PROXIMITY_OUT) {
                PTOOL->active = false;

                if (PTOOL->pSurface) {
                    wlr_tablet_v2_tablet_tool_notify_proximity_out(PTOOL->wlrTabletToolV2);
                    PTOOL->pSurface = nullptr;
                }

            } else {
                PTOOL->active = true;
                g_pInputManager->refocus();
                g_pInputManager->focusTablet(PTAB, EVENT->tool);
            }
        },
        PNEWTABLET, "Tablet");
}

STabletTool* CInputManager::ensureTabletToolPresent(wlr_tablet_tool* pTool) {
    if (pTool->data == nullptr) {
        const auto PTOOL = &m_lTabletTools.emplace_back();

        Debug::log(LOG, "Creating tablet tool v2 for %x", pTool);

        PTOOL->wlrTabletTool = pTool;
        pTool->data          = PTOOL;

        PTOOL->wlrTabletToolV2 = wlr_tablet_tool_create(g_pCompositor->m_sWLRTabletManager, g_pCompositor->m_sSeat.seat, pTool);

        PTOOL->hyprListener_TabletToolDestroy.initCallback(
            &pTool->events.destroy,
            [](void* owner, void* data) {
                const auto PTOOL = (STabletTool*)owner;

                PTOOL->wlrTabletTool->data = nullptr;
                g_pInputManager->m_lTabletTools.remove(*PTOOL);
            },
            PTOOL, "Tablet Tool V1");

        //TODO: set cursor request
    }

    return (STabletTool*)pTool->data;
}

void CInputManager::newTabletPad(wlr_input_device* pDevice) {
    const auto PNEWPAD = &m_lTabletPads.emplace_back();

    try {
        PNEWPAD->name = deviceNameToInternalString(pDevice->name);
    } catch (std::exception& e) {
        Debug::log(ERR, "Pad had no name???"); // logic error
    }

    PNEWPAD->wlrTabletPadV2 = wlr_tablet_pad_create(g_pCompositor->m_sWLRTabletManager, g_pCompositor->m_sSeat.seat, pDevice);

    PNEWPAD->hyprListener_Button.initCallback(
        &wlr_tablet_pad_from_input_device(pDevice)->events.button,
        [](void* owner, void* data) {
            const auto EVENT = (wlr_tablet_pad_button_event*)data;
            const auto PPAD  = (STabletPad*)owner;

            wlr_tablet_v2_tablet_pad_notify_mode(PPAD->wlrTabletPadV2, EVENT->group, EVENT->mode, EVENT->time_msec);
            wlr_tablet_v2_tablet_pad_notify_button(PPAD->wlrTabletPadV2, EVENT->button, EVENT->time_msec, (zwp_tablet_pad_v2_button_state)EVENT->state);
        },
        PNEWPAD, "Tablet Pad");

    PNEWPAD->hyprListener_Strip.initCallback(
        &wlr_tablet_pad_from_input_device(pDevice)->events.strip,
        [](void* owner, void* data) {
            const auto EVENT = (wlr_tablet_pad_strip_event*)data;
            const auto PPAD  = (STabletPad*)owner;

            wlr_tablet_v2_tablet_pad_notify_strip(PPAD->wlrTabletPadV2, EVENT->strip, EVENT->position, EVENT->source == WLR_TABLET_PAD_STRIP_SOURCE_FINGER, EVENT->time_msec);
        },
        PNEWPAD, "Tablet Pad");

    PNEWPAD->hyprListener_Ring.initCallback(
        &wlr_tablet_pad_from_input_device(pDevice)->events.strip,
        [](void* owner, void* data) {
            const auto EVENT = (wlr_tablet_pad_ring_event*)data;
            const auto PPAD  = (STabletPad*)owner;

            wlr_tablet_v2_tablet_pad_notify_ring(PPAD->wlrTabletPadV2, EVENT->ring, EVENT->position, EVENT->source == WLR_TABLET_PAD_RING_SOURCE_FINGER, EVENT->time_msec);
        },
        PNEWPAD, "Tablet Pad");

    PNEWPAD->hyprListener_Attach.initCallback(
        &wlr_tablet_pad_from_input_device(pDevice)->events.strip,
        [](void* owner, void* data) {
            const auto TABLET = (wlr_tablet_tool*)data;
            const auto PPAD   = (STabletPad*)owner;

            PPAD->pTabletParent = (STablet*)TABLET->data;

            if (!PPAD->pTabletParent)
                Debug::log(ERR, "tabletpad got attached to a nullptr tablet!! this might be bad.");
        },
        PNEWPAD, "Tablet Pad");

    PNEWPAD->hyprListener_Destroy.initCallback(
        &pDevice->events.destroy,
        [](void* owner, void* data) {
            const auto PPAD = (STabletPad*)owner;

            g_pInputManager->m_lTabletPads.remove(*PPAD);

            Debug::log(LOG, "Removed a tablet pad");
        },
        PNEWPAD, "Tablet Pad");
}

void CInputManager::focusTablet(STablet* pTab, wlr_tablet_tool* pTool, bool motion) {
    const auto PTOOL = g_pInputManager->ensureTabletToolPresent(pTool);

    if (const auto PWINDOW = g_pCompositor->m_pLastWindow; PWINDOW) {
        const auto CURSORPOS = g_pInputManager->getMouseCoordsInternal();

        const auto LOCAL = CURSORPOS - PWINDOW->m_vRealPosition.goalv();

        if (PTOOL->pSurface != g_pCompositor->m_pLastFocus)
            wlr_tablet_v2_tablet_tool_notify_proximity_out(PTOOL->wlrTabletToolV2);

        if (g_pCompositor->m_pLastFocus) {
            PTOOL->pSurface = g_pCompositor->m_pLastFocus;
            wlr_tablet_v2_tablet_tool_notify_proximity_in(PTOOL->wlrTabletToolV2, pTab->wlrTabletV2, g_pCompositor->m_pLastFocus);
        }

        if (motion)
            wlr_tablet_v2_tablet_tool_notify_motion(PTOOL->wlrTabletToolV2, LOCAL.x, LOCAL.y);
    } else {
        if (PTOOL->pSurface)
            wlr_tablet_v2_tablet_tool_notify_proximity_out(PTOOL->wlrTabletToolV2);
    }
}