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map.c

/* $Id: map.c,v 1.30 2003/09/24 18:49:00 ukai Exp $ */
/*
 * client-side image maps
 */
#include "fm.h"
#include <math.h>

MapList *
searchMapList(Buffer *buf, char *name)
{
    MapList *ml;

    if (name == NULL)
      return NULL;
    for (ml = buf->maplist; ml != NULL; ml = ml->next) {
      if (!Strcmp_charp(ml->name, name))
          break;
    }
    return ml;
}

#ifdef USE_IMAGE
static int
inMapArea(MapArea * a, int x, int y)
{
    int i;
    double r1, r2, s, c, t;

    if (!a)
      return FALSE;
    switch (a->shape) {
    case SHAPE_RECT:
      if (x >= a->coords[0] && y >= a->coords[1] &&
          x <= a->coords[2] && y <= a->coords[3])
          return TRUE;
      break;
    case SHAPE_CIRCLE:
      if ((x - a->coords[0]) * (x - a->coords[0])
          + (y - a->coords[1]) * (y - a->coords[1])
          <= a->coords[2] * a->coords[2])
          return TRUE;
      break;
    case SHAPE_POLY:
      for (t = 0, i = 0; i < a->ncoords; i += 2) {
          r1 = sqrt((double)(x - a->coords[i]) * (x - a->coords[i])
                  + (double)(y - a->coords[i + 1]) * (y -
                                            a->coords[i + 1]));
          r2 = sqrt((double)(x - a->coords[i + 2]) * (x - a->coords[i + 2])
                  + (double)(y - a->coords[i + 3]) * (y -
                                            a->coords[i + 3]));
          if (r1 == 0 || r2 == 0)
            return TRUE;
          s = ((double)(x - a->coords[i]) * (y - a->coords[i + 3])
             - (double)(x - a->coords[i + 2]) * (y -
                                         a->coords[i +
                                                 1])) / r1 / r2;
          c = ((double)(x - a->coords[i]) * (x - a->coords[i + 2])
             + (double)(y - a->coords[i + 1]) * (y -
                                         a->coords[i +
                                                 3])) / r1 / r2;
          t += atan2(s, c);
      }
      if (fabs(t) > 2 * 3.14)
          return TRUE;
      break;
    case SHAPE_DEFAULT:
      return TRUE;
    default:
      break;
    }
    return FALSE;
}

static int
nearestMapArea(MapList *ml, int x, int y)
{
    ListItem *al;
    MapArea *a;
    int i, l, n = -1, min = -1, limit = pixel_per_char * pixel_per_char
      + pixel_per_line * pixel_per_line;

    if (!ml || !ml->area)
      return n;
    for (i = 0, al = ml->area->first; al != NULL; i++, al = al->next) {
      a = (MapArea *) al->ptr;
      if (a) {
          l = (a->center_x - x) * (a->center_x - x)
            + (a->center_y - y) * (a->center_y - y);
          if ((min < 0 || l < min) && l < limit) {
            n = i;
            min = l;
          }
      }
    }
    return n;
}

static int
searchMapArea(Buffer *buf, MapList *ml, Anchor *a_img)
{
    ListItem *al;
    MapArea *a;
    int i, n;
    int px, py;

    if (!(ml && ml->area && ml->area->nitem))
      return -1;
    if (!getMapXY(buf, a_img, &px, &py))
      return -1;
    n = -ml->area->nitem;
    for (i = 0, al = ml->area->first; al != NULL; i++, al = al->next) {
      a = (MapArea *) al->ptr;
      if (!a)
          continue;
      if (n < 0 && inMapArea(a, px, py)) {
          if (a->shape == SHAPE_DEFAULT) {
            if (n == -ml->area->nitem)
                n = -i;
          }
          else
            n = i;
      }
    }
    if (n == -ml->area->nitem)
      return nearestMapArea(ml, px, py);
    else if (n < 0)
      return -n;
    return n;
}

MapArea *
retrieveCurrentMapArea(Buffer *buf)
{
    Anchor *a_img, *a_form;
    FormItemList *fi;
    MapList *ml;
    ListItem *al;
    MapArea *a;
    int i, n;

    a_img = retrieveCurrentImg(buf);
    if (!(a_img && a_img->image && a_img->image->map))
      return NULL;
    a_form = retrieveCurrentForm(buf);
    if (!(a_form && a_form->url))
      return NULL;
    fi = (FormItemList *)a_form->url;
    if (!(fi && fi->parent && fi->parent->item))
      return NULL;
    fi = fi->parent->item;
    ml = searchMapList(buf, fi->value ? fi->value->ptr : NULL);
    if (!ml)
      return NULL;
    n = searchMapArea(buf, ml, a_img);
    if (n < 0)
      return NULL;
    for (i = 0, al = ml->area->first; al != NULL; i++, al = al->next) {
      a = (MapArea *) al->ptr;
      if (a && i == n)
          return a;
    }
    return NULL;
}

int
getMapXY(Buffer *buf, Anchor *a, int *x, int *y)
{
    if (!buf || !a || !a->image || !x || !y)
      return 0;
    *x = (int)((buf->currentColumn + buf->cursorX
            - COLPOS(buf->currentLine, a->start.pos) + 0.5)
             * pixel_per_char) - a->image->xoffset;
    *y = (int)((buf->currentLine->linenumber - a->image->y + 0.5)
             * pixel_per_line) - a->image->yoffset;
    if (*x <= 0)
      *x = 1;
    if (*y <= 0)
      *y = 1;
    return 1;
}
#endif

Anchor *
retrieveCurrentMap(Buffer *buf)
{
    Anchor *a;
    FormItemList *fi;

    a = retrieveCurrentForm(buf);
    if (!a || !a->url)
      return NULL;
    fi = (FormItemList *)a->url;
    if (fi->parent->method == FORM_METHOD_INTERNAL &&
      !Strcmp_charp(fi->parent->action, "map"))
      return a;
    return NULL;
}

#if defined(USE_IMAGE) || defined(MENU_MAP)
MapArea *
follow_map_menu(Buffer *buf, char *name, Anchor *a_img, int x, int y)
{
    MapList *ml;
    ListItem *al;
    int i, selected = -1;
    int initial = 0;
#ifdef MENU_MAP
    MapArea *a;
    char **label;
#endif

    ml = searchMapList(buf, name);
    if (ml == NULL || ml->area == NULL || ml->area->nitem == 0)
      return NULL;

#ifdef USE_IMAGE
    initial = searchMapArea(buf, ml, a_img);
    if (initial < 0)
      initial = 0;
    else if (!image_map_list) {
      selected = initial;
      goto map_end;
    }
#endif

#ifdef MENU_MAP
    label = New_N(char *, ml->area->nitem + 1);
    for (i = 0, al = ml->area->first; al != NULL; i++, al = al->next) {
      a = (MapArea *) al->ptr;
      if (a)
          label[i] = *a->alt ? a->alt : a->url;
      else
          label[i] = "";
    }
    label[ml->area->nitem] = NULL;

    optionMenu(x, y, label, &selected, initial, NULL);
#endif

#ifdef USE_IMAGE
  map_end:
#endif
    if (selected >= 0) {
      for (i = 0, al = ml->area->first; al != NULL; i++, al = al->next) {
          if (al->ptr && i == selected)
            return (MapArea *) al->ptr;
      }
    }
    return NULL;
}
#endif

#ifndef MENU_MAP
char *map1 = "<HTML><HEAD><TITLE>Image map links</TITLE></HEAD>\
<BODY><H1>Image map links</H1>\
<table>";

Buffer *
follow_map_panel(Buffer *buf, char *name)
{
    Str mappage;
    MapList *ml;
    ListItem *al;
    MapArea *a;
    ParsedURL pu;
    char *p, *q;
    Buffer *newbuf;

    ml = searchMapList(buf, name);
    if (ml == NULL)
      return NULL;

    mappage = Strnew_charp(map1);
    for (al = ml->area->first; al != NULL; al = al->next) {
      a = (MapArea *) al->ptr;
      if (!a)
          continue;
      parseURL2(a->url, &pu, baseURL(buf));
      p = parsedURL2Str(&pu)->ptr;
      q = html_quote(p);
      if (DecodeURL)
          p = html_quote(url_unquote_conv(p, buf->document_charset));
      else
          p = q;
      Strcat_m_charp(mappage, "<tr valign=top><td><a href=\"", q, "\">",
                   html_quote(*a->alt ? a->alt : mybasename(a->url)),
                   "</a><td>", p, NULL);
    }
    Strcat_charp(mappage, "</table></body></html>");

    newbuf = loadHTMLString(mappage);
#ifdef USE_M17N
    if (newbuf)
      newbuf->document_charset = buf->document_charset;
#endif
    return newbuf;
}
#endif

MapArea *
newMapArea(char *url, char *target, char *alt, char *shape, char *coords)
{
    MapArea *a = New(MapArea);
#ifdef USE_IMAGE
    char *p;
    int i, max;
#endif

    a->url = url;
    a->target = target;
    a->alt = alt ? alt : "";
#ifdef USE_IMAGE
    a->shape = SHAPE_RECT;
    if (shape) {
      if (!strcasecmp(shape, "default"))
          a->shape = SHAPE_DEFAULT;
      else if (!strncasecmp(shape, "rect", 4))
          a->shape = SHAPE_RECT;
      else if (!strncasecmp(shape, "circ", 4))
          a->shape = SHAPE_CIRCLE;
      else if (!strncasecmp(shape, "poly", 4))
          a->shape = SHAPE_POLY;
      else
          a->shape = SHAPE_UNKNOWN;
    }
    a->coords = NULL;
    a->ncoords = 0;
    a->center_x = 0;
    a->center_y = 0;
    if (a->shape == SHAPE_UNKNOWN || a->shape == SHAPE_DEFAULT)
      return a;
    if (!coords) {
      a->shape = SHAPE_UNKNOWN;
      return a;
    }
    if (a->shape == SHAPE_RECT) {
      a->coords = New_N(short, 4);
      a->ncoords = 4;
    }
    else if (a->shape == SHAPE_CIRCLE) {
      a->coords = New_N(short, 3);
      a->ncoords = 3;
    }
    max = a->ncoords;
    for (i = 0, p = coords; (a->shape == SHAPE_POLY || i < a->ncoords) && *p;) {
      while (IS_SPACE(*p))
          p++;
      if (!IS_DIGIT(*p) && *p != '-' && *p != '+')
          break;
      if (a->shape == SHAPE_POLY) {
          if (max <= i) {
            max = i ? i * 2 : 6;
            a->coords = New_Reuse(short, a->coords, max + 2);
          }
          a->ncoords++;
      }
      a->coords[i] = (short)atoi(p);
      i++;
      if (*p == '-' || *p == '+')
          p++;
      while (IS_DIGIT(*p))
          p++;
      if (*p != ',' && !IS_SPACE(*p))
          break;
      while (IS_SPACE(*p))
          p++;
      if (*p == ',')
          p++;
    }
    if (i != a->ncoords || (a->shape == SHAPE_POLY && a->ncoords < 6)) {
      a->shape = SHAPE_UNKNOWN;
      a->coords = NULL;
      a->ncoords = 0;
      return a;
    }
    if (a->shape == SHAPE_POLY) {
      a->ncoords = a->ncoords / 2 * 2;
      a->coords[a->ncoords] = a->coords[0];
      a->coords[a->ncoords + 1] = a->coords[1];
    }
    if (a->shape == SHAPE_CIRCLE) {
      a->center_x = a->coords[0];
      a->center_y = a->coords[1];
    }
    else {
      for (i = 0; i < a->ncoords / 2; i++) {
          a->center_x += a->coords[2 * i];
          a->center_y += a->coords[2 * i + 1];
      }
      a->center_x /= a->ncoords / 2;
      a->center_y /= a->ncoords / 2;
    }
#endif
    return a;
}

/* append image map links */
static void
append_map_info(Buffer *buf, Str tmp, FormItemList *fi)
{
    MapList *ml;
    ListItem *al;
    MapArea *a;
    ParsedURL pu;
    char *p, *q;

    ml = searchMapList(buf, fi->value ? fi->value->ptr : NULL);
    if (ml == NULL)
      return;

    Strcat_m_charp(tmp,
               "<tr valign=top><td colspan=2>Links of current image map",
               "<tr valign=top><td colspan=2><table>", NULL);
    for (al = ml->area->first; al != NULL; al = al->next) {
      a = (MapArea *) al->ptr;
      if (!a)
          continue;
      parseURL2(a->url, &pu, baseURL(buf));
      q = html_quote(parsedURL2Str(&pu)->ptr);
      if (DecodeURL)
          p = html_quote(url_unquote_conv(a->url, buf->document_charset));
      else
          p = html_quote(a->url);
      Strcat_m_charp(tmp, "<tr valign=top><td>&nbsp;&nbsp;<td><a href=\"",
                   q, "\">",
                   html_quote(*a->alt ? a->alt : mybasename(a->url)),
                   "</a><td>", p, "\n", NULL);
    }
    Strcat_charp(tmp, "</table>");
}

/* append links */
static void
append_link_info(Buffer *buf, Str html, LinkList * link)
{
    LinkList *l;
    ParsedURL pu;
    char *url;

    if (!link)
      return;

    Strcat_charp(html, "<hr width=50%><h1>Link information</h1><table>\n");
    for (l = link; l; l = l->next) {
      if (l->url) {
          parseURL2(l->url, &pu, baseURL(buf));
          url = html_quote(parsedURL2Str(&pu)->ptr);
      }
      else
          url = "(empty)";
      Strcat_m_charp(html, "<tr valign=top><td><a href=\"", url, "\">",
                   l->title ? html_quote(l->title) : "(empty)", "</a><td>",
                   NULL);
      if (l->type == LINK_TYPE_REL)
          Strcat_charp(html, "[Rel]");
      else if (l->type == LINK_TYPE_REV)
          Strcat_charp(html, "[Rev]");
      if (!l->url)
          url = "(empty)";
      else if (DecodeURL)
          url = html_quote(url_unquote_conv(l->url, buf->document_charset));
      else
          url = html_quote(l->url);
      Strcat_m_charp(html, "<td>", url, NULL);
      if (l->ctype)
          Strcat_m_charp(html, " (", html_quote(l->ctype), ")", NULL);
      Strcat_charp(html, "\n");
    }
    Strcat_charp(html, "</table>\n");
}

/* append frame URL */
static void
append_frame_info(Buffer *buf, Str html, struct frameset *set, int level)
{
    char *p, *q;
    int i, j;

    if (!set)
      return;

    for (i = 0; i < set->col * set->row; i++) {
      union frameset_element frame = set->frame[i];
      if (frame.element != NULL) {
          switch (frame.element->attr) {
          case F_UNLOADED:
          case F_BODY:
            if (frame.body->url == NULL)
                break;
            Strcat_charp(html, "<pre_int>");
            for (j = 0; j < level; j++)
                Strcat_charp(html, "   ");
            q = html_quote(frame.body->url);
            Strcat_m_charp(html, "<a href=\"", q, "\">", NULL);
            if (frame.body->name) {
                p = html_quote(url_unquote_conv(frame.body->name,
                                        buf->document_charset));
                Strcat_charp(html, p);
            }
            if (DecodeURL)
                p = html_quote(url_unquote_conv(frame.body->url,
                                        buf->document_charset));
            else
                p = q;
            Strcat_m_charp(html, " ", p, "</a></pre_int><br>\n", NULL);
#ifdef USE_SSL
            if (frame.body->ssl_certificate)
                Strcat_m_charp(html,
                           "<blockquote><h2>SSL certificate</h2><pre>\n",
                           html_quote(frame.body->ssl_certificate),
                           "</pre></blockquote>\n", NULL);
#endif
            break;
          case F_FRAMESET:
            append_frame_info(buf, html, frame.set, level + 1);
            break;
          }
      }
    }
}

/* 
 * information of current page and link 
 */
Buffer *
page_info_panel(Buffer *buf)
{
    Str tmp = Strnew_size(1024);
    Anchor *a;
    ParsedURL pu;
    TextListItem *ti;
    struct frameset *f_set = NULL;
    int all;
    char *p, *q;
#ifdef USE_M17N
    wc_ces_list *list;
    char charset[16];
#endif
    Buffer *newbuf;

    Strcat_charp(tmp, "<html><head>\
<title>Information about current page</title>\
</head><body>\
<h1>Information about current page</h1>\n");
    if (buf == NULL)
      goto end;
    all = buf->allLine;
    if (all == 0 && buf->lastLine)
      all = buf->lastLine->linenumber;
#ifdef USE_M17N
    Strcat_charp(tmp, "<form method=internal action=charset>");
#endif
    p = parsedURL2Str(&buf->currentURL)->ptr;
    if (DecodeURL)
      p = url_unquote_conv(p, 0);
    Strcat_m_charp(tmp, "<table cellpadding=0>",
               "<tr valign=top><td nowrap>Title<td>",
               html_quote(buf->buffername),
               "<tr valign=top><td nowrap>Current URL<td>",
               html_quote(p),
               "<tr valign=top><td nowrap>Document Type<td>",
               buf->real_type ? html_quote(buf->real_type) : "unknown",
               "<tr valign=top><td nowrap>Last Modified<td>",
               html_quote(last_modified(buf)), NULL);
#ifdef USE_M17N
    if (buf->document_charset != InnerCharset) {
      list = wc_get_ces_list();
      Strcat_charp(tmp,
                 "<tr><td nowrap>Document Charset<td><select name=charset>");
      for (; list->name != NULL; list++) {
          sprintf(charset, "%d", (unsigned int)list->id);
          Strcat_m_charp(tmp, "<option value=", charset,
                     (buf->document_charset == list->id) ? " selected>"
                     : ">", list->desc, NULL);
      }
      Strcat_charp(tmp, "</select>");
      Strcat_charp(tmp, "<tr><td><td><input type=submit value=Change>");
    }
#endif
    Strcat_m_charp(tmp,
               "<tr valign=top><td nowrap>Number of lines<td>",
               Sprintf("%d", all)->ptr,
               "<tr valign=top><td nowrap>Transferred bytes<td>",
               Sprintf("%d", buf->trbyte)->ptr, NULL);

    a = retrieveCurrentAnchor(buf);
    if (a != NULL) {
      parseURL2(a->url, &pu, baseURL(buf));
      p = parsedURL2Str(&pu)->ptr;
      q = html_quote(p);
      if (DecodeURL)
          p = html_quote(url_unquote_conv(p, buf->document_charset));
      else
          p = q;
      Strcat_m_charp(tmp,
                   "<tr valign=top><td nowrap>URL of current anchor<td><a href=\"",
                   q, "\">", p, "</a>", NULL);
    }
    a = retrieveCurrentImg(buf);
    if (a != NULL) {
      parseURL2(a->url, &pu, baseURL(buf));
      p = parsedURL2Str(&pu)->ptr;
      q = html_quote(p);
      if (DecodeURL)
          p = html_quote(url_unquote_conv(p, buf->document_charset));
      else
          p = q;
      Strcat_m_charp(tmp,
                   "<tr valign=top><td nowrap>URL of current image<td><a href=\"",
                   q, "\">", p, "</a>", NULL);
    }
    a = retrieveCurrentForm(buf);
    if (a != NULL) {
      FormItemList *fi = (FormItemList *)a->url;
      p = form2str(fi);
      if (DecodeURL)
          p = html_quote(url_unquote_conv(p, buf->document_charset));
      else
          p = html_quote(p);
      Strcat_m_charp(tmp,
                   "<tr valign=top><td nowrap>Method/type of current form&nbsp;<td>",
                   p, NULL);
      if (fi->parent->method == FORM_METHOD_INTERNAL
          && !Strcmp_charp(fi->parent->action, "map"))
          append_map_info(buf, tmp, fi->parent->item);
    }
    Strcat_charp(tmp, "</table>\n");
#ifdef USE_M17N
    Strcat_charp(tmp, "</form>");
#endif

    append_link_info(buf, tmp, buf->linklist);

    if (buf->document_header != NULL) {
      Strcat_charp(tmp, "<hr width=50%><h1>Header information</h1><pre>\n");
      for (ti = buf->document_header->first; ti != NULL; ti = ti->next)
          Strcat_m_charp(tmp, "<pre_int>", html_quote(ti->ptr),
                     "</pre_int>\n", NULL);
      Strcat_charp(tmp, "</pre>\n");
    }

    if (buf->frameset != NULL)
      f_set = buf->frameset;
    else if (buf->bufferprop & BP_FRAME &&
           buf->nextBuffer != NULL && buf->nextBuffer->frameset != NULL)
      f_set = buf->nextBuffer->frameset;

    if (f_set) {
      Strcat_charp(tmp, "<hr width=50%><h1>Frame information</h1>\n");
      append_frame_info(buf, tmp, f_set, 0);
    }
#ifdef USE_SSL
    if (buf->ssl_certificate)
      Strcat_m_charp(tmp, "<h1>SSL certificate</h1><pre>\n",
                   html_quote(buf->ssl_certificate), "</pre>\n", NULL);
#endif
  end:
    Strcat_charp(tmp, "</body></html>");
    newbuf = loadHTMLString(tmp);
#ifdef USE_M17N
    if (newbuf)
      newbuf->document_charset = buf->document_charset;
#endif
    return newbuf;
}

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