#ifndef MUPDF_PDF_EVENT_H
#define MUPDF_PDF_EVENT_H

/*
	Document events: the objects via which MuPDF informs the calling app
	of occurrences emanating from the document, possibly from user interaction
	or javascript execution. MuPDF informs the app of document events via a
	callback.
*/

struct pdf_doc_event_s
{
	int type;
};

enum
{
	PDF_DOCUMENT_EVENT_ALERT,
	PDF_DOCUMENT_EVENT_PRINT,
	PDF_DOCUMENT_EVENT_LAUNCH_URL,
	PDF_DOCUMENT_EVENT_MAIL_DOC,
	PDF_DOCUMENT_EVENT_SUBMIT,
	PDF_DOCUMENT_EVENT_EXEC_MENU_ITEM,
};

/*
	set the function via which to receive
	document events.
*/
void pdf_set_doc_event_callback(fz_context *ctx, pdf_document *doc, pdf_doc_event_cb *event_cb, void *data);
void *pdf_get_doc_event_callback_data(fz_context *ctx, pdf_document *doc);

/*
	The various types of document events
*/

/*
	details of an alert event. In response the app should
	display an alert dialog with the buttons specified by "button_type_group".
	If "check_box_message" is non-NULL, a checkbox should be displayed in
	the lower-left corned along with the message.

	"finally_checked" and "button_pressed" should be set by the app
	before returning from the callback. "finally_checked" need be set
	only if "check_box_message" is non-NULL.
*/
typedef struct
{
	const char *message;
	int icon_type;
	int button_group_type;
	const char *title;
	const char *check_box_message;
	int initially_checked;
	int finally_checked;
	int button_pressed;
} pdf_alert_event;

/* Possible values of icon_type */
enum
{
	PDF_ALERT_ICON_ERROR,
	PDF_ALERT_ICON_WARNING,
	PDF_ALERT_ICON_QUESTION,
	PDF_ALERT_ICON_STATUS
};

/* Possible values of button_group_type */
enum
{
	PDF_ALERT_BUTTON_GROUP_OK,
	PDF_ALERT_BUTTON_GROUP_OK_CANCEL,
	PDF_ALERT_BUTTON_GROUP_YES_NO,
	PDF_ALERT_BUTTON_GROUP_YES_NO_CANCEL
};

/* Possible values of button_pressed */
enum
{
	PDF_ALERT_BUTTON_NONE,
	PDF_ALERT_BUTTON_OK,
	PDF_ALERT_BUTTON_CANCEL,
	PDF_ALERT_BUTTON_NO,
	PDF_ALERT_BUTTON_YES
};

pdf_alert_event *pdf_access_alert_event(fz_context *ctx, pdf_doc_event *event);

const char *pdf_access_exec_menu_item_event(fz_context *ctx, pdf_doc_event *event);

/*
	details of a launch-url event. The app should
	open the url, either in a new frame or in the current window.
*/
typedef struct
{
	const char *url;
	int new_frame;
} pdf_launch_url_event;

pdf_launch_url_event *pdf_access_launch_url_event(fz_context *ctx, pdf_doc_event *event);

/*
	details of a mail_doc event. The app should save
	the current state of the document and email it using the specified
	parameters.
*/
typedef struct
{
	int ask_user;
	const char *to;
	const char *cc;
	const char *bcc;
	const char *subject;
	const char *message;
} pdf_mail_doc_event;

pdf_mail_doc_event *pdf_access_mail_doc_event(fz_context *ctx, pdf_doc_event *event);

void pdf_event_issue_alert(fz_context *ctx, pdf_document *doc, pdf_alert_event *event);
void pdf_event_issue_print(fz_context *ctx, pdf_document *doc);
void pdf_event_issue_exec_menu_item(fz_context *ctx, pdf_document *doc, const char *item);
void pdf_event_issue_launch_url(fz_context *ctx, pdf_document *doc, const char *url, int new_frame);
void pdf_event_issue_mail_doc(fz_context *ctx, pdf_document *doc, pdf_mail_doc_event *event);

#endif