o_box.c

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/***************************************************************************
 begin       : Sat Feb 20 2010
 copyright   : (C) 2010 by Martin Preuss
 email       : martin@libchipcard.de

 ***************************************************************************
 *          Please see toplevel file COPYING for license details           *
 ***************************************************************************/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#define DISABLE_DEBUGLOG


#include "o_box_l.h"
#include "htmlctx_l.h"

#include <gwenhywfar/debug.h>



#define LINE_EXTRA_OFFSET_DIV 20



static int HtmlObject_Box_Layout(HTML_OBJECT *o)
{
  HTML_OBJECT *c;
  HTML_OBJECT *cFirstInLine;
  GWEN_XML_CONTEXT *ctx;
  int w;
  //int h;
  int x=0;
  int y=0;
  int maxX=0;
  int lineHeight=0;
  int rv;
  //int resX;
  int resY;

  w=HtmlObject_GetWidth(o);
  //h=HtmlObject_GetHeight(o);

  ctx=HtmlObject_GetXmlCtx(o);
  //resX=HtmlCtx_GetResolutionX(ctx);
  resY=HtmlCtx_GetResolutionY(ctx);

  c=HtmlObject_Tree_GetFirstChild(o);
  cFirstInLine=c;
  while (c) {
    int th;

    if ((HtmlObject_GetFlags(c) & HTML_OBJECT_FLAGS_START_ON_NEWLINE) &&
        x>0) {
      /* next line */
      if (x>maxX)
        maxX=x;

      /* possibly justify */
      if (w!=-1 && x<w) {
        int diff=0;

        if (HtmlObject_GetFlags(o) & HTML_OBJECT_FLAGS_JUSTIFY_RIGHT)
          diff=w-x;
        else if (HtmlObject_GetFlags(o) & HTML_OBJECT_FLAGS_JUSTIFY_HCENTER) {
          diff=(w-x)>>1;
        }
        if (diff) {
          HTML_OBJECT *ct;

          ct=cFirstInLine;
          while (ct) {
            HtmlObject_SetX(ct, HtmlObject_GetX(ct)+diff);
            if (ct==c)
              break;
            ct=HtmlObject_Tree_GetNext(ct);
          }
        }
      }

      x=0;
      y+=lineHeight+(resY/LINE_EXTRA_OFFSET_DIV);
      lineHeight=0;
      cFirstInLine=HtmlObject_Tree_GetNext(c);
    }

    HtmlObject_SetHeight(c, -1);
    if (w==-1) {
      HtmlObject_SetWidth(c, -1);
      rv=HtmlObject_Layout(c);
      if (rv<0) {
        DBG_INFO(GWEN_LOGDOMAIN, "here (%d)", rv);
        return rv;
      }
    }
    else {
      int tw;

      tw=w-x;
      HtmlObject_SetWidth(c, tw);
      rv=HtmlObject_Layout(c);
      if (rv<0) {
        DBG_INFO(GWEN_LOGDOMAIN, "here (%d)", rv);
        return rv;
      }

      if (HtmlObject_GetWidth(c)>tw && x>0) {
        /* next line */
        if (x>maxX)
          maxX=x;

        /* possibly justify */
        if (x<w) {
          int diff=0;

          if (HtmlObject_GetFlags(o) & HTML_OBJECT_FLAGS_JUSTIFY_RIGHT)
            diff=w-x;
          else if (HtmlObject_GetFlags(o) & HTML_OBJECT_FLAGS_JUSTIFY_HCENTER) {
            diff=(w-x)>>1;
          }
          if (diff) {
            HTML_OBJECT *ct;

            ct=cFirstInLine;
            while (ct) {
              HtmlObject_SetX(ct, HtmlObject_GetX(ct)+diff);
              if (ct==c)
                break;
              ct=HtmlObject_Tree_GetNext(ct);
            }
          }
        }

        x=0;
        y+=lineHeight+(resY/LINE_EXTRA_OFFSET_DIV);
        lineHeight=0;
        cFirstInLine=HtmlObject_Tree_GetNext(c);
      }
    }

    HtmlObject_SetX(c, x);
    HtmlObject_SetY(c, y);

    th=HtmlObject_GetHeight(c);
    if (th>lineHeight)
      lineHeight=th;

    x+=HtmlObject_GetWidth(c);

    if ((HtmlObject_GetFlags(c) & HTML_OBJECT_FLAGS_END_WITH_NEWLINE)) {
      if (x>0) {
        /* next line */
        if (x>maxX)
          maxX=x;

        /* possibly justify */
        if (x<w) {
          int diff=0;

          if (HtmlObject_GetFlags(o) & HTML_OBJECT_FLAGS_JUSTIFY_RIGHT)
            diff=w-x;
          else if (HtmlObject_GetFlags(o) & HTML_OBJECT_FLAGS_JUSTIFY_HCENTER) {
            diff=(w-x)>>1;
          }
          if (diff) {
            HTML_OBJECT *ct;

            ct=cFirstInLine;
            while (ct) {
              HtmlObject_SetX(ct, HtmlObject_GetX(ct)+diff);
              if (ct==c)
                break;
              ct=HtmlObject_Tree_GetNext(ct);
            }
          }
        }
      }

      x=0;
      if (lineHeight==0) {
        HTML_PROPS *pr;
        HTML_FONT *fnt;

        pr=HtmlObject_GetProperties(o);
        assert(pr);
        fnt=HtmlProps_GetFont(pr);
        lineHeight=HtmlCtx_GetTextHeight(HtmlObject_GetXmlCtx(o), fnt, "ABCD");
      }
      y+=lineHeight+(resY/LINE_EXTRA_OFFSET_DIV);
      lineHeight=0;
      cFirstInLine=HtmlObject_Tree_GetNext(c);
    }

    c=HtmlObject_Tree_GetNext(c);
  }

  if (x>0) {
    /* next line */
    if (x>maxX)
      maxX=x;

    /* possibly justify */
    if (x<w) {
      int diff=0;

      if (HtmlObject_GetFlags(o) & HTML_OBJECT_FLAGS_JUSTIFY_RIGHT)
        diff=w-x;
      else if (HtmlObject_GetFlags(o) & HTML_OBJECT_FLAGS_JUSTIFY_HCENTER) {
        diff=(w-x)>>1;
      }
      if (diff) {
        HTML_OBJECT *ct;

        ct=cFirstInLine;
        while (ct) {
          HtmlObject_SetX(ct, HtmlObject_GetX(ct)+diff);
          ct=HtmlObject_Tree_GetNext(ct);
        }
      }
    }

    x=0;
    y+=lineHeight+(resY/LINE_EXTRA_OFFSET_DIV);
    lineHeight=0;
  }

  /* finish layout */
  HtmlObject_SetWidth(o, maxX+1);
  HtmlObject_SetHeight(o, y+1);
  return 0;
}



HTML_OBJECT *HtmlObject_Box_new(GWEN_XML_CONTEXT *ctx)
{
  HTML_OBJECT *o;

  o=HtmlObject_new(ctx, HtmlObjectType_Box);
  HtmlObject_SetLayoutFn(o, HtmlObject_Box_Layout);

  return o;
}