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/* This module contains the dw_page widget, which is the "back end" to
Web text widgets including html. */
#ifndef __DW_PAGE_H__
#define __DW_PAGE_H__
#include <gdk/gdk.h>
#include "dw_container.h"
#include "url.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define DW_TYPE_PAGE (a_Dw_page_get_type ())
#define DW_PAGE(obj) GTK_CHECK_CAST ((obj), DW_TYPE_PAGE, DwPage)
#define DW_PAGE_CLASS(klass) GTK_CHECK_CLASS_CAST ((klass), DW_TYPE_PAGE, \
DwPageClass)
#define DW_IS_PAGE(obj) GTK_CHECK_TYPE ((obj), DW_TYPE_PAGE)
#define DW_IS_PAGE_CLASS(klass) GTK_CHECK_CLASS_TYPE ((klass), DW_TYPE_PAGE)
typedef struct _DwPage DwPage;
typedef struct _DwPageClass DwPageClass;
/* Internal data structures (maybe shouldn't be in public .h file? */
typedef struct _DwPageLine DwPageLine;
typedef struct _DwPageWord DwPageWord;
struct _DwPageLine
{
gint first_word; /* first-word's position in DwPageWord [0 based] */
gint last_word; /* last-word's position in DwPageWord [1 based] */
/* "top" is always relative to the top of the first line, i.e.
* page->lines[0].top is always 0. */
gint32 top, ascent, descent, break_space, left_offset;
/* This is similar to descent, but includes the bottom margins of the
* widgets within this line. */
gint32 margin_descent;
/* The following members contain accumulated values, from the top
* down to the line before. */
gint32 max_line_width; /* maximum of all line widths */
gint32 max_word_min; /* maximum of all word minima */
gint32 max_par_max; /* maximum of all paragraph maxima */
gint32 par_min; /* the minimal total width down from the last
paragraph start, to the *beginning* of the
line */
gint32 par_max; /* the maximal total width down from the last
paragraph start, to the *beginning* of the
line */
};
struct _DwPageWord {
/* todo: perhaps add a x_left? */
DwRequisition size;
/* Space after the word, only if it's not a break: */
gint32 orig_space; /* from font, set by a_Dw_page_add_space */
gint32 eff_space; /* effective space, set by Dw_page_word_wrap,
used for drawing etc. */
gint hl_start[DW_HIGHLIGHT_NUM_LAYERS], hl_end[DW_HIGHLIGHT_NUM_LAYERS];
DwContent content;
DwStyle *style;
DwStyle *space_style; /* initially the same as of the word, later
set by a_Dw_page_add_space */
};
struct _DwPage
{
DwContainer container;
/* These fields provide some ad-hoc-functionality, used by sub-classes. */
gboolean list_item; /* If TRUE, the first word of the page is treated
specially (search in source). */
gint32 inner_padding; /* This is an additional padding on the left side
(used by DwListItem). */
gint32 line1_offset; /* This is an additional offset of the first line.
May be negative (shift to left) or positive
(shift to right). */
gint32 line1_offset_eff; /* The "effective" value of line1_offset, may
differ from line1_offset when
ignore_line1_offset_sometimes is set to TRUE */
/* The following is really hackish: It is used for DwTableCell (see
* comment in dw_table_cell.c), to avoid too wide table columns. If
* set to TRUE, it has following effects:
*
* (i) line1_offset is ignored in calculating the minimal width
* (which is used by DwTable!), and
* (ii) line1_offset is ignored (line1_offset_eff is set to 0),
* when line1_offset plus the width of the first word is
* greater than the the available witdh.
*
* todo: Eliminate all these ad-hoc features by a new, simpler and
* more elegant design. ;-)
*/
gboolean ignore_line1_offset_sometimes;
gboolean must_queue_resize;
/* These values are set by set_... */
gint32 avail_width, avail_ascent, avail_descent;
gint32 last_line_width;
gint32 last_line_par_min;
gint32 last_line_par_max;
gint wrap_ref; /* [0 based] */
DwPageLine *lines;
gint num_lines;
gint num_lines_max; /* number allocated */
DwPageWord *words;
gint num_words;
gint num_words_max; /* number allocated */
/* The word index of the link under a button press, and the char
* position */
gint link_pressed_index;
gint link_pressed_char_pos;
gint hover_link; /* The link under the button. */
DwTooltip *hover_tooltip; /* The tooltip under the button. No ref hold. */
};
struct _DwPageClass
{
DwContainerClass parent_class;
gboolean (*link_entered) (DwPage *page,
gint link, gint x, gint y);
gboolean (*link_pressed) (DwPage *page,
gint link, gint x, gint y,
GdkEventButton *event);
gboolean (*link_released) (DwPage *page,
gint link, gint x, gint y,
GdkEventButton *event);
gboolean (*link_clicked) (DwPage *page,
gint link, gint x, gint y,
GdkEventButton *event);
void (*word_wrap) (DwPage *page,
gint word_ind);
};
DwWidget* a_Dw_page_new (void);
GtkType a_Dw_page_get_type (void);
void a_Dw_page_flush (DwPage *page);
void a_Dw_page_set_voffset (DwPage *page, gint32 voffset);
void a_Dw_page_add_text (DwPage *page, char *text, DwStyle *style);
void a_Dw_page_add_widget (DwPage *page,
DwWidget *widget,
DwStyle *style);
void a_Dw_page_add_anchor (DwPage *page, const char *name, DwStyle *style);
void a_Dw_page_add_space(DwPage *page, DwStyle *style);
void a_Dw_page_add_parbreak (DwPage *page, gint space, DwStyle *style);
void a_Dw_page_add_linebreak (DwPage *page, DwStyle *style);
void a_Dw_page_hand_over_break (DwPage *page, DwStyle *style);
void a_Dw_page_change_link_color (DwPage *page, gint link, gint32 new_color);
void a_Dw_page_change_word_style (DwPage *page, gint from, gint to,
DwStyle *style, gboolean include_first_space,
gboolean include_last_space);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __DW_PAGE_H__ */
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