#include <pretty.h>

Inheritance diagram for col_pretty:

Data Structures
struct	column_ty
struct	emit_ty
Public Member Functions
virtual	~col_pretty ()
Static Public Member Functions
static pointer	create (const wide_output::pointer &deeper)
Protected Member Functions
output::pointer	create (int left, int right, const char *title)
void	title (const nstring &first, const nstring &second)
void	eoln ()
void	need (int n)
void	eject ()
void	flush ()
void	forget (const output::pointer &op)
Private Member Functions
	col_pretty (const wide_output::pointer &deeper)
void	emit (size_t argc, emit_ty *argv, int minlines, bool is_the_header)
void	emit_header ()
void	emit_content ()
	col_pretty ()
	col_pretty (const col_pretty &)
col_pretty &	operator= (const col_pretty &)
Private Attributes
wide_output::pointer	deeper
bool	need_to_emit_headers
size_t	ncolumns
size_t	ncolumns_max
column_ty *	column

Detailed Description

The col_pretty class is used to represent multi-column output with line wrap around the column values, and formatting across multiple lines.

Definition at line 32 of file pretty.h.

Constructor & Destructor Documentation

virtual col_pretty::~col_pretty ( ) [virtual]

The destructor.

col_pretty::col_pretty ( const wide_output::pointer & deeper ) [private]

The constructor. Its is private on pupose, use the create class method instead.

Parameters:

deeper The output stream upon which to write the columnar output.

col_pretty::col_pretty ( ) [private]

The default constructor. Do not use.

col_pretty::col_pretty ( const col_pretty & ) [private]

The copy constructor. Do not use.

Member Function Documentation

static pointer col_pretty::create ( const wide_output::pointer & deeper ) [static]

The create class method is used to create new dynamically allocated instances of this class.

Parameters:

deeper The output stream upon which to write the columnar output.

output::pointer col_pretty::create	(	int	left,
		int	right,
		const char *	title
	)		`[protected, virtual]`

The create method is used to specify a range of locations for an output column.

The contents will be de-tabbed and wrapped before output.

Parameters:

left	the left-hand edge of the column. If you say -1, it will use the righ-hand side of the previous column, plus one. (Note: NOT the right-most column.)
right	the right-hand edge of the column, plus one. zero means the rest of the line
title	the column title to use. Give NULL pointer for none.

Returns:: output::pointer ; a pointer to an output stream to be used to write into this column. Use the delete operator when you are done with the column.

Implements col.

void col_pretty::eject ( ) [protected, virtual]

The eject method is used to move to the top of the next page, if we aren't there already.

Implements col.

void col_pretty::emit	(	size_t	argc,
		emit_ty *	argv,
		int	minlines,
		bool	is_the_header
	)		`[private]`

The emit method is used to emit the given values of text out of the deeper output stream. The emitting is factored into this common method, rather than reproduce the code twice, once for the headers and again for the content.

void col_pretty::emit_content ( ) [private]

The emit_content method is used to generate the output, given the content written and formatted via the wide output streams privide by create (below).

Usually, the column headers are handled by the top-of-page callback, however if new columns with headers are created in the middle of the page, this method also causes the new column headings to be emitted, before the content.

void col_pretty::emit_header ( ) [private]

The emit_header method is used to emit column headers when necessary. It clears the flag which controls emitting the headers, too.

void col_pretty::eoln ( ) [protected, virtual]

The eoln method is used to signal that an entire line of columns has been assembled and that it should be emitted to the output file or pager.

Columns all receive an implicit newline, and are flushed before processing. All of the columns are thus aligned into rows, even when (due to newlines or wrapping) they would otherwise be different lengths.

This is the interface used by clients of this subsystem.

Implements col.

void col_pretty::flush ( ) [protected, virtual]

The flush method is used to force output of all buffered data.

Implements col.

void col_pretty::forget ( const output::pointer & op ) [protected, virtual]

The forget method is used to discontinue an output column.

Parameters:

op	The column to forget.

Implements col.

void col_pretty::need ( int n ) [protected, virtual]

The need method is used to nominate that a number of lines is needed before the end of the page. If the lines are available, a blank line is emitted, otherwise a new page is thrown.

Parameters: