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namespace Display {
typedef = private;
(Display*) connect();
(Display*) init_with_hooks(const Hooks* hooks);
() close(Display*? this);
(Status) set_ui_definition(Display* this, const UIDefinition *keep ui_def);
/*
TODO Each task will need some state, and the format of the state
depends on the task type. I'm not sure if this is possible with
the current type system (maybe with constraints). In most OO languages
we could just use a virtual function (which is type safe, because only
the constructor can assign it's address).
Maybe it can be done with union types and constraints? The problem is
that we must force the this pointer to be of a given type, even in
places where the base type is used.
typedef A = (
// Restricted this pointer
()(A* this constraint(value^.f == f))* f,
);
typedef B = (
// How to create a union of these?
union (
A original_type, // FIXME need sth like constraint(original_type is a type of B),
(
// Is this type compatible (for all valid values)?
()(B* this constraint(value^.f == f))* f,
) overridden_type,
) base,
byte[10] specific_data,
);
*/
() add_task(Display* this, Task* task);
() remove_task(Display* this, Task* task);
() queue_repaint(Display* this, Task* task);
namespace Hooks {
typedef = (
// TODO
);
}
}
/*
Overall structure:
Static:
Target:
Dynamic:
Task: For example a document or a web page. Might be presented as a
tab in a window.
Examples:
Web browser:
target:
commands/parameters (back, address bar, title),
document (web page)
status:
download progress
task:
web page
Terminal:
target:
commands/parameters (copy&paste, reset, )
console
status:
more output, command finished
task:
shell
E-mail client:
target:
commands/parameters (settings)
subtasks: folder
target (folder):
commands/parameters (new e-mail)
list of e-mails
subtask: e-mail
status:
new e-mails
target (e-mail):
commands/parameters (reply [if incoming], send [if new])
text
attachments
tasks:
folder
e-mail
IRC chat client:
target:
commands/parameters (settings)
subtasks: channels
target (channel):
commands/parameters (kick, op, key exchange)
conversation text
user list
status:
new messages, highlight messages
tasks:
channel
GIMP Plugin:
target:
command/parameters (ok, cancel, each parameter)
tasks:
image
Dialog box:
target:
command/parameters (yes, no, etc...)
text
status:
user input needed
tasks:
Depends. Could be a web page if the dialog box is created by a
browser plugin.
*/
namespace UIDefinition {
typedef = (
count target_count;
Target[target_count]* targets;
// TODO application statuses
// TODO definition of how task statuses should be merged?
);
}
namespace View {
typedef = (
count command_count,
Command[command_count]* commands,
count target_count,
Target[target_count]* targets,
// TODO definitions of task statuses?
);
}
namespace NestedViewTarget {
typedef = (
Target base constraint(value.type = NestedView);
View *view;
);
}
namespace CanvasTarget {
typedef = (
Target base constraint(value.type = Canvas);
// Hooks
(CanvasRequest)(const Task*? task)* on_task_available;
()(const Task* task, const PaintRequest *req)* on_paint_request;
);
}
namespace Target {
typedef Type = enum (NestedView, Canvas);
typedef = (
Type type
);
}
namespace Task {
typedef = (
);
}
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