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SGMLListText.c
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SGMLListText.c
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/*==================================================================*/
/* */
/* SGMLListTextObject */
/* */
/* T.Johnson - ([email protected]) June.92 */
/* */
/* Defines a list text segment for the SGMLHyper widget */
/* */
/*==================================================================*/
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include "SGMLListTextP.h"
/*
Private functions
*/
/*
Widget class methods
*/
static void ClassInitialize();
static void Initialize();
static void Destroy();
static void ComputeSize();
static Boolean AdjustSize();
static void Redisplay();
#define Offset(field) XtOffsetOf(SGMLListTextRec,sgml_list_text.field)
static XtResource resources[] = {
{SGMLNnumBullets, XtCReadOnly, XtRInt, sizeof(int),
Offset(num_bullets), XtRImmediate, (XtPointer) 0},
{SGMLNallocBullets, XtCReadOnly, XtRInt, sizeof(int),
Offset(alloc_bullets), XtRImmediate, (XtPointer) 0},
{SGMLNbulletType, SGMLCBulletType, SGMLRBulletType, sizeof(int),
Offset(bullet_type), XtRImmediate, (XtPointer) SGMLBULLET_DEFAULT},
{SGMLNbulletSize, SGMLCBulletSize, XtRDimension, sizeof(Dimension),
Offset(bullet_size), XtRImmediate, (XtPointer) 10},
{SGMLNbulletIndent, SGMLCBulletIndent, XtRDimension, sizeof(Dimension),
Offset(bullet_indent), XtRImmediate, (XtPointer) 5},
{SGMLNbulletColor, SGMLCBulletColor, XtRPixel, sizeof(Pixel),
Offset(bullet_color), XtRImmediate, (XtPointer) 0}
};
#undef Offset
/*---------------------------------------------------------------*/
/* Static initialisation of the class record */
/*---------------------------------------------------------------*/
SGMLListTextClassRec sGMLListTextClassRec = {
{
(WidgetClass) &sGMLCompositeTextClassRec,
/* superclass */
"SGMLListText", /* class_name */
sizeof(SGMLListTextRec), /* widget_size */
ClassInitialize, /* class_initialize */
NULL, /* class_part_initialize */
FALSE, /* class_inited */
Initialize, /* initialize */
NULL, /* initialize_hook */
NULL, /* obj1 */
NULL, /* obj2 */
0, /* obj3 */
resources, /* resources */
XtNumber(resources), /* num_resources */
NULLQUARK, /* xrm_class */
0, /* obj4 */
0, /* obj5 */
0, /* obj6 */
0, /* obj7 */
Destroy, /* destroy */
NULL, /* obj8 */
NULL, /* obj9 */
NULL, /* set_values */
NULL, /* set_values_hook */
NULL, /* obj10 */
NULL, /* get_values_hook */
NULL, /* obj11 */
XtVersion, /* version */
NULL, /* callback private */
NULL, /* obj12 */
NULL, /* obj13 */
NULL, /* obj14 */
NULL, /* extension */
},
{
ComputeSize, /* compute_size */
SGMLInheritAdjustSize, /* adjust_size */
SGMLInheritAdjustPosition, /* adjust_position */
Redisplay, /* expose */
SGMLInheritActivate, /* activate */
SGMLInheritHilite, /* hilite */
SGMLInheritContains, /* contains */
SGMLInheritCallCreateCallback, /* call_create_callback */
SGMLInheritCallMapCallback, /* call_map_callback */
SGMLInheritMakeVisible, /* make_visible */
NULL, /* extension */
},
{
NULL, /* geometry_manager */
NULL, /* change_managed */
XtInheritInsertChild, /* insert_child */
XtInheritDeleteChild, /* delete_child */
NULL, /* ignore */
},
{
NULL /* ignore */
}
};
WidgetClass sGMLListTextObjectClass = (WidgetClass) &sGMLListTextClassRec;
/*--------------------------------------------------------------*/
/* ClassInitialize: */
/*--------------------------------------------------------------*/
static void ClassInitialize()
{
}
/*--------------------------------------------------------------*/
/* Initialize: */
/*--------------------------------------------------------------*/
static void Initialize (request, new)
SGMLListTextObject request, new;
{
new->sgml_list_text.bullets = NULL;
new->sgml_list_text.num_bullets = 0;
new->sgml_list_text.alloc_bullets = 0;
}
/*--------------------------------------------------------------*/
/* Destroy the widget: release all memory allocated */
/*--------------------------------------------------------------*/
static void Destroy (w)
SGMLListTextObject w;
{
XtFree((char *) w->sgml_list_text.bullets);
}
/*--------------------------------------------------------------*/
/* Redisplay */
/*--------------------------------------------------------------*/
static void Redisplay(t,event,region)
SGMLListTextObject t;
XEvent *event;
Region region;
{
/*
* Invoke our superclasses ReDisplay routine ... then draw bullets
*/
Display *dpy = XtDisplayOfObject((Widget) t);
Window wind = XtWindowOfObject((Widget) t);
GC gc = t->sgml_text.gc;
int i;
SGMLTextObjectClass superclass = (SGMLTextObjectClass) XtSuperclass((Widget) t);
(*superclass->sgml_text_class.expose)(t,event,region);
for (i = 0; i < t->sgml_list_text.num_bullets; i++ )
{
Dimension width = t->sgml_list_text.bullet_size;
Dimension height = t->sgml_list_text.bullet_size;
Position x = t->sgml_list_text.bullets[i].x - width;
Position y = t->sgml_list_text.bullets[i].y;
if(XRectInRegion(region,x,y,width,height) != RectangleOut)
XFillRectangle(dpy,wind,gc,x,y,width,height);
}
}
/*------------------------------------------------------------------*/
/* Adjust the size of a child */
/*------------------------------------------------------------------*/
static Boolean AdjustSize(child,y,ascent,depth)
Widget child;
Position y;
Dimension ascent, depth;
{
SGMLListTextObject w = (SGMLListTextObject) XtParent(child);
int n = w->sgml_composite_text.num_children;
WidgetList children = w->sgml_composite_text.children;
WidgetList p = children;
Boolean cont;
for (; n-- > 0; p++)
if (*p == child)
{
for (; p-- != children ; )
{
SGMLTextObjectClass childClass = (SGMLTextObjectClass) XtClass(*p);
cont = (*childClass->sgml_text_class.adjust_size)(*p,y,ascent,depth);
if (!cont) return FALSE;
}
return TRUE;
}
return TRUE;
}
/*--------------------------------------------------------------*/
/* Compute Size: */
/*--------------------------------------------------------------*/
static void ComputeSize(w,geom,Adjust,Closure)
SGMLListTextObject w;
SGMLGeometry *geom;
AdjustSizeProc Adjust;
Opaque Closure;
{
int n = w->sgml_composite_text.num_children;
WidgetList children = w->sgml_composite_text.children;
Dimension maxWidth;
Position x = w->sgml_text.left_margin + w->sgml_text.left_indent - w->sgml_list_text.bullet_indent;
XtFree((char *) w->sgml_list_text.bullets);
w->sgml_list_text.bullets = NULL;
w->sgml_list_text.num_bullets = 0;
w->sgml_list_text.alloc_bullets = 0;
/*
* Break before?
*/
if ( w->sgml_text.break_before )
{
_SGMLBreak(geom,w->sgml_text.space_before);
}
/*
* Query children?
*/
for (; n-- > 0; children++)
{
SGMLTextObjectClass childClass = (SGMLTextObjectClass) XtClass(*children);
if (geom->broken)
{
if (w->sgml_list_text.num_bullets == w->sgml_list_text.alloc_bullets)
w->sgml_list_text.bullets = (BulletList) XtRealloc((char *)w->sgml_list_text.bullets,
(w->sgml_list_text.alloc_bullets += 10) * sizeof(BulletListItem));
w->sgml_list_text.bullets[w->sgml_list_text.num_bullets].x = x;
w->sgml_list_text.bullets[w->sgml_list_text.num_bullets].y = geom->coord.y;
w->sgml_list_text.num_bullets++;
geom->coord.depth = w->sgml_list_text.bullet_size;
geom->coord.ascent = w->sgml_list_text.bullet_size;
}
(*childClass->sgml_text_class.compute_size)(*children,geom,AdjustSize,*children);
}
/*
* Break after?
*/
if ( w->sgml_text.break_after )
{
_SGMLBreak(geom,w->sgml_text.space_after);
}
}
/*-----------------------------------------------------------------------*/
/* Create a new SGMLListTextObject */
/*-----------------------------------------------------------------------*/
Widget SGMLCreateListText(parent,name,al,ac)
Widget parent;
char *name;
ArgList al;
int ac;
{
return XtCreateWidget(name,sGMLListTextObjectClass,parent,al,ac);
}