Here we create a new client/compositor interface in weston to allow clients to report their x/y cursor position to the compositor. These values are then used to center the zoom area on this point. This is useful for everyone, especially people who are visually impaired.
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<protocol name="text_cursor_position"> |
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<interface name="text_cursor_position" version="1"> |
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<request name="notify"> |
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<arg name="surface" type="object" interface="wl_surface"/> |
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<arg name="x" type="uint"/> |
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<arg name="y" type="uint"/> |
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</request> |
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</interface> |
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</protocol> |
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/*
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* Copyright © 2011 Intel Corporation |
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* Copyright © 2012 Scott Moreau |
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* |
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* Permission to use, copy, modify, distribute, and sell this software and |
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* its documentation for any purpose is hereby granted without fee, provided |
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* that the above copyright notice appear in all copies and that both that |
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* copyright notice and this permission notice appear in supporting |
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* documentation, and that the name of the copyright holders not be used in |
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* advertising or publicity pertaining to distribution of the software |
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* without specific, written prior permission. The copyright holders make |
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* no representations about the suitability of this software for any |
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* purpose. It is provided "as is" without express or implied warranty. |
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* |
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS |
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY |
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER |
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF |
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <stdlib.h> |
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#include "compositor.h" |
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#include "text-cursor-position-server-protocol.h" |
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struct text_cursor_position { |
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struct wl_object base; |
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struct weston_compositor *ec; |
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struct wl_global *global; |
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struct wl_listener destroy_listener; |
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}; |
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static void |
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text_cursor_position_notify(struct wl_client *client, |
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struct wl_resource *resource, |
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struct wl_resource *surface_resource, |
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uint32_t x, uint32_t y) |
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{ |
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weston_text_cursor_position_notify((struct weston_surface *) surface_resource, x, y); |
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} |
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struct text_cursor_position_interface text_cursor_position_implementation = { |
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text_cursor_position_notify |
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}; |
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static void |
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bind_text_cursor_position(struct wl_client *client, |
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void *data, uint32_t version, uint32_t id) |
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{ |
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wl_client_add_object(client, &text_cursor_position_interface, |
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&text_cursor_position_implementation, id, data); |
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} |
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static void |
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text_cursor_position_notifier_destroy(struct wl_listener *listener, void *data) |
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{ |
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struct text_cursor_position *text_cursor_position = |
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container_of(listener, struct text_cursor_position, destroy_listener); |
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wl_display_remove_global(text_cursor_position->ec->wl_display, text_cursor_position->global); |
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free(text_cursor_position); |
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} |
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void |
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text_cursor_position_notifier_create(struct weston_compositor *ec) |
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{ |
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struct text_cursor_position *text_cursor_position; |
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text_cursor_position = malloc(sizeof *text_cursor_position); |
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if (text_cursor_position == NULL) |
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return; |
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text_cursor_position->base.interface = &text_cursor_position_interface; |
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text_cursor_position->base.implementation = |
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(void(**)(void)) &text_cursor_position_implementation; |
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text_cursor_position->ec = ec; |
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text_cursor_position->global = wl_display_add_global(ec->wl_display, |
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&text_cursor_position_interface, |
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text_cursor_position, bind_text_cursor_position); |
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text_cursor_position->destroy_listener.notify = text_cursor_position_notifier_destroy; |
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wl_signal_add(&ec->destroy_signal, &text_cursor_position->destroy_listener); |
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} |
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