message.c File Reference

Automated RISC OS message routing (implementation). More...

#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include "oslib/os.h"
#include "oslib/wimp.h"
#include "utils/log.h"
#include "riscos/message.h"
#include "riscos/gui.h"

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Data Structures
struct	active_message

Functions
static struct active_message *	ro_message_add (unsigned int message_code, void(*callback)(wimp_message *message))
static void	ro_message_free (int ref)
bool	ro_message_send_message (wimp_event_no event, wimp_message *message, wimp_t task, void(*callback)(wimp_message *message))
	Sends a message and registers a return route for a bounce. More...
bool	ro_message_send_message_to_window (wimp_event_no event, wimp_message *message, wimp_w to_w, wimp_i to_i, void(*callback)(wimp_message *message), wimp_t *to_t)
	Sends a message and registers a return route for a bounce. More...
bool	ro_message_register_handler (wimp_message *message, unsigned int message_code, void(*callback)(wimp_message *message))
	Registers a return route for a message. More...
bool	ro_message_register_route (unsigned int message_code, void(*callback)(wimp_message *message))
	Registers a route for a message code. More...
bool	ro_message_handle_message (wimp_event_no event, wimp_message *message)
	Attempts to route a message. More...

Variables
struct active_message *	current_messages = NULL

Detailed Description

Automated RISC OS message routing (implementation).

Definition in file message.c.

Function Documentation

ro_message_add()

struct active_message * ro_message_add ( unsigned int  message_code, void(*)(wimp_message *message)  callback  )

static

Definition at line 165 of file message.c.

References active_message::callback, current_messages, active_message::id, active_message::message_code, active_message::next, and active_message::previous.

Referenced by ro_message_register_handler(), and ro_message_register_route().

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ro_message_free()

void ro_message_free ( int  ref )

static

Definition at line 234 of file message.c.

References current_messages, active_message::id, active_message::next, and active_message::previous.

Referenced by ro_message_handle_message().

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ro_message_handle_message()

bool ro_message_handle_message	(	wimp_event_no	event,
		wimp_message *	message
	)

Attempts to route a message.

Parameters

event	wimp event
message	the message to attempt to route

Returns

true if message was routed, false otherwise

Definition at line 192 of file message.c.

References active_message::callback, current_messages, active_message::id, active_message::message_code, active_message::next, and ro_message_free().

Referenced by ro_gui_user_message().

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ro_message_register_handler()

bool ro_message_register_handler	(	wimp_message *	message,
		unsigned int	message_code,
		void(*)(wimp_message *message)	callback
	)

Registers a return route for a message.

This function must be called after wimp_send_message so that a valid value is present in the my_ref field.

Parameters

message	the message to register a route back for
message_code	the message action code to route
callback	the code to call for a matched action

Returns

true on success, false on memory exhaustion

Definition at line 134 of file message.c.

References active_message::callback, active_message::id, active_message::message_code, and ro_message_add().

Referenced by ro_message_send_message(), and ro_message_send_message_to_window().

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ro_message_register_route()

bool ro_message_register_route	(	unsigned int	message_code,
		void(*)(wimp_message *message)	callback
	)

Registers a route for a message code.

Parameters

message_code	the message action code to route
callback	the code to call for a matched action

Returns

true on success, false on memory exhaustion

Definition at line 157 of file message.c.

References active_message::callback, active_message::message_code, and ro_message_add().

Referenced by gui_init().

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ro_message_send_message()

bool ro_message_send_message	(	wimp_event_no	event,
		wimp_message *	message,
		wimp_t	task,
		void(*)(wimp_message *message)	callback
	)

Sends a message and registers a return route for a bounce.

Parameters

event	the message event type
message	the message to register a route back for
task	the task to send a message to, or 0 for broadcast
callback	the code to call on a bounce

Returns

true on success, false otherwise

Definition at line 57 of file message.c.

References active_message::callback, NSLOG, ro_message_register_handler(), and ro_warn_user().

Referenced by ro_gui_hotlist_add_page(), ro_gui_selection_prepare_paste(), ro_gui_selection_prepare_paste_dataload(), ro_gui_selection_prepare_paste_datasave(), ro_gui_selection_send_dragging(), ro_gui_send_datasave(), and ro_gui_view_source().

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ro_message_send_message_to_window()

bool ro_message_send_message_to_window	(	wimp_event_no	event,
		wimp_message *	message,
		wimp_w	to_w,
		wimp_i	to_i,
		void(*)(wimp_message *message)	callback,
		wimp_t *	to_t
	)

Sends a message and registers a return route for a bounce.

Parameters

event	the message event type
message	the message to register a route back for
to_w	the window to send the message to
to_i	the icon
callback	the code to call on a bounce
to_t	receives the task handle of the window's creator

Returns

true on success, false otherwise

Definition at line 94 of file message.c.

References active_message::callback, NSLOG, ro_message_register_handler(), and ro_warn_user().

Referenced by ro_gui_save_drag_end(), and ro_gui_selection_send_dragging().

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Variable Documentation

current_messages

struct active_message* current_messages = NULL

Definition at line 41 of file message.c.

Referenced by ro_message_add(), ro_message_free(), and ro_message_handle_message().