205 lines
7.0 KiB
C
205 lines
7.0 KiB
C
/*
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* This an unstable interface of wlroots. No guarantees are made regarding the
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* future consistency of this API.
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*/
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#ifndef WLR_USE_UNSTABLE
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#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features"
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#endif
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#ifndef WLR_TYPES_WLR_CURSOR_H
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#define WLR_TYPES_WLR_CURSOR_H
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#include <wayland-server-core.h>
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#include <wlr/types/wlr_input_device.h>
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#include <wlr/types/wlr_output_layout.h>
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#include <wlr/types/wlr_output.h>
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/**
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* wlr_cursor implements the behavior of the "cursor", that is, the image on the
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* screen typically moved about with a mouse or so. It provides tracking for
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* this in global coordinates, and integrates with wlr_output,
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* wlr_output_layout, and wlr_input_device. You can use it to abstract multiple
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* input devices over a single cursor, constrain cursor movement to the usable
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* area of a wlr_output_layout and communicate position updates to the hardware
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* cursor, constrain specific input devices to specific outputs or regions of
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* the screen, and so on.
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*/
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struct wlr_box;
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struct wlr_cursor_state;
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struct wlr_cursor {
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struct wlr_cursor_state *state;
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double x, y;
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/**
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* The interpretation of these signals is the responsibility of the
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* compositor, but some helpers are provided for your benefit. If you
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* receive a relative motion event, for example, you may want to call
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* wlr_cursor_move. If you receive an absolute event, call
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* wlr_cursor_warp_absolute. If you pass an input device into these
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* functions, it will apply the region/output constraints associated with
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* that device to the resulting cursor motion. If an output layout is
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* attached, these functions will constrain the resulting cursor motion to
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* within the usable space of the output layout.
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*
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* Re-broadcasting these signals to, for example, a wlr_seat, is also your
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* responsibility.
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*/
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struct {
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struct wl_signal motion;
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struct wl_signal motion_absolute;
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struct wl_signal button;
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struct wl_signal axis;
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struct wl_signal frame;
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struct wl_signal swipe_begin;
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struct wl_signal swipe_update;
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struct wl_signal swipe_end;
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struct wl_signal pinch_begin;
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struct wl_signal pinch_update;
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struct wl_signal pinch_end;
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struct wl_signal hold_begin;
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struct wl_signal hold_end;
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struct wl_signal touch_up;
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struct wl_signal touch_down;
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struct wl_signal touch_motion;
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struct wl_signal touch_cancel;
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struct wl_signal touch_frame;
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struct wl_signal tablet_tool_axis;
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struct wl_signal tablet_tool_proximity;
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struct wl_signal tablet_tool_tip;
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struct wl_signal tablet_tool_button;
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} events;
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void *data;
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};
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struct wlr_cursor *wlr_cursor_create(void);
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void wlr_cursor_destroy(struct wlr_cursor *cur);
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/**
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* Warp the cursor to the given x and y in layout coordinates. If x and y are
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* out of the layout boundaries or constraints, no warp will happen.
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*
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* `dev` may be passed to respect device mapping constraints. If `dev` is NULL,
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* device mapping constraints will be ignored.
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*
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* Returns true when the cursor warp was successful.
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*/
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bool wlr_cursor_warp(struct wlr_cursor *cur, struct wlr_input_device *dev,
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double lx, double ly);
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/**
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* Convert absolute 0..1 coordinates to layout coordinates.
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*
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* `dev` may be passed to respect device mapping constraints. If `dev` is NULL,
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* device mapping constraints will be ignored.
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*/
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void wlr_cursor_absolute_to_layout_coords(struct wlr_cursor *cur,
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struct wlr_input_device *dev, double x, double y, double *lx, double *ly);
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/**
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* Warp the cursor to the given x and y coordinates. If the given point is out
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* of the layout boundaries or constraints, the closest point will be used.
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* If one coordinate is NAN, it will be ignored.
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*
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* `dev` may be passed to respect device mapping constraints. If `dev` is NULL,
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* device mapping constraints will be ignored.
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*/
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void wlr_cursor_warp_closest(struct wlr_cursor *cur,
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struct wlr_input_device *dev, double x, double y);
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/**
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* Warp the cursor to the given x and y in absolute 0..1 coordinates. If the
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* given point is out of the layout boundaries or constraints, the closest point
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* will be used. If one coordinate is NAN, it will be ignored.
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*
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* `dev` may be passed to respect device mapping constraints. If `dev` is NULL,
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* device mapping constraints will be ignored.
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*/
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void wlr_cursor_warp_absolute(struct wlr_cursor *cur,
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struct wlr_input_device *dev, double x, double y);
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/**
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* Move the cursor in the direction of the given x and y layout coordinates. If
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* one coordinate is NAN, it will be ignored.
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*
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* `dev` may be passed to respect device mapping constraints. If `dev` is NULL,
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* device mapping constraints will be ignored.
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*/
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void wlr_cursor_move(struct wlr_cursor *cur, struct wlr_input_device *dev,
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double delta_x, double delta_y);
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/**
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* Set the cursor image. stride is given in bytes. If pixels is NULL, hides the
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* cursor.
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*
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* If scale isn't zero, the image is only set on outputs having the provided
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* scale.
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*/
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void wlr_cursor_set_image(struct wlr_cursor *cur, const uint8_t *pixels,
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int32_t stride, uint32_t width, uint32_t height, int32_t hotspot_x,
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int32_t hotspot_y, float scale);
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/**
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* Set the cursor surface. The surface can be committed to update the cursor
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* image. The surface position is subtracted from the hotspot. A NULL surface
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* commit hides the cursor.
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*/
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void wlr_cursor_set_surface(struct wlr_cursor *cur, struct wlr_surface *surface,
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int32_t hotspot_x, int32_t hotspot_y);
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/**
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* Attaches this input device to this cursor. The input device must be one of:
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*
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* - WLR_INPUT_DEVICE_POINTER
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* - WLR_INPUT_DEVICE_TOUCH
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* - WLR_INPUT_DEVICE_TABLET_TOOL
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*/
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void wlr_cursor_attach_input_device(struct wlr_cursor *cur,
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struct wlr_input_device *dev);
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void wlr_cursor_detach_input_device(struct wlr_cursor *cur,
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struct wlr_input_device *dev);
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/**
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* Uses the given layout to establish the boundaries and movement semantics of
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* this cursor. Cursors without an output layout allow infinite movement in any
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* direction and do not support absolute input events.
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*/
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void wlr_cursor_attach_output_layout(struct wlr_cursor *cur,
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struct wlr_output_layout *l);
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/**
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* Attaches this cursor to the given output, which must be among the outputs in
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* the current output_layout for this cursor. This call is invalid for a cursor
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* without an associated output layout.
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*/
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void wlr_cursor_map_to_output(struct wlr_cursor *cur,
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struct wlr_output *output);
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/**
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* Maps all input from a specific input device to a given output. The input
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* device must be attached to this cursor and the output must be among the
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* outputs in the attached output layout.
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*/
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void wlr_cursor_map_input_to_output(struct wlr_cursor *cur,
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struct wlr_input_device *dev, struct wlr_output *output);
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/**
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* Maps this cursor to an arbitrary region on the associated wlr_output_layout.
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*/
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void wlr_cursor_map_to_region(struct wlr_cursor *cur, struct wlr_box *box);
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/**
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* Maps inputs from this input device to an arbitrary region on the associated
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* wlr_output_layout.
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*/
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void wlr_cursor_map_input_to_region(struct wlr_cursor *cur,
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struct wlr_input_device *dev, struct wlr_box *box);
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#endif
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