Fossil

    ** array of COPY/DELETE/INSERT triples.
    */
    free(c.aFrom);
    free(c.aTo);
    return c.aEdit;
  }
}

/*
** Copy a line with a limit. Used for side-by-side diffs to enforce a maximum
** line length limit.
*/
static char *copylimline(char *out, DLine *dl, int lim){
  int len;
  len = dl->h & LENGTH_MASK;
  if( lim && len > lim ){
    memcpy(out, dl->z, lim-3);
    memcpy(&out[lim-3], "...", 4);
  }else{
    memcpy(out, dl->z, len);
    out[len] = '\0';
  }
  return out;
}

/*
** Output table body of a side-by-side diff. Prior to the call, the caller
** should have output:
**   <table class="sbsdiff">
**   <tr><th colspan="2" class="diffhdr">Old title</th><th/>
**   <th colspan="2" class="diffhdr">New title</th></tr>
**
** And after the call, it should output:
**   </table>
**
** Some good reference diffs in the fossil repository for testing:
** /vdiff?from=080d27a&to=4b0f813&detail=1
** /vdiff?from=636804745b&to=c1d78e0556&detail=1
** /vdiff?from=c0b6c28d29&to=25169506b7&detail=1
** /vdiff?from=e3d022dffa&to=48bcfbd47b&detail=1
*/
int html_sbsdiff(
  Blob *pA_Blob,   /* FROM file */
  Blob *pB_Blob,   /* TO file */
  int nContext,    /* Amount of context to unified diff */
  int ignoreEolWs  /* Ignore whitespace at the end of lines */
){
  DContext c;
  int i;
  int iFrom, iTo;
  char *linebuf;
  int collim=0; /* Currently not settable; allows a column limit for diffs */
  int allowExp=0; /* Currently not settable; (dis)allow expansion of rows */

  /* Prepare the input files */
  memset(&c, 0, sizeof(c));
  c.aFrom = break_into_lines(blob_str(pA_Blob), blob_size(pA_Blob),
                             &c.nFrom, ignoreEolWs);
  c.aTo = break_into_lines(blob_str(pB_Blob), blob_size(pB_Blob),
                           &c.nTo, ignoreEolWs);
  if( c.aFrom==0 || c.aTo==0 ){
    free(c.aFrom);
    free(c.aTo);
    /* Note: This would be generated within a table. */
    @ <p class="generalError" style="white-space: nowrap">cannot compute
    @ difference between binary files</p>
    return 0;
  }

  collim = collim < 4 ? 0 : collim;

  /* Compute the difference */
  diff_all(&c);

  linebuf = fossil_malloc(LENGTH_MASK+1);
  if( !linebuf ){
    free(c.aFrom);
    free(c.aTo);
    free(c.aEdit);
    return 0;
  }

  iFrom=iTo=0;
  i=0;
  while( i<c.nEdit ){
    int j;
    /* Copied lines */
    for( j=0; j<c.aEdit[i]; j++){
      /* Hide lines which are copied and are further away from block boundaries
      ** than nContext lines. For each block with hidden lines, show a row
      ** notifying the user about the hidden rows.
      */
      if( j<nContext || j>c.aEdit[i]-nContext-1 ){
        @ <tr>
      }else if( j==nContext && j<c.aEdit[i]-nContext-1 ){
        @ <tr>
        @ <td class="meta" colspan="5" style="white-space: nowrap;">
        @ %d(c.aEdit[i]-2*nContext) hidden lines</td>
        @ </tr>
        if( !allowExp )
           continue;
        @ <tr style="display:none;">
      }else{
        if( !allowExp )
           continue;
        @ <tr style="display:none;">
      }

      copylimline(linebuf, &c.aFrom[iFrom+j], collim);
      @ <td class="lineno">%d(iFrom+j+1)</td>
      @ <td class="srcline">%h(linebuf)</td>

      @ <td> </td>

      copylimline(linebuf, &c.aTo[iTo+j], collim);
      @ <td class="lineno">%d(iTo+j+1)</td>
      @ <td class="srcline">%h(linebuf)</td>

      @ </tr>
    }
    iFrom+=c.aEdit[i];
    iTo+=c.aEdit[i];

    if( c.aEdit[i+1]!=0 && c.aEdit[i+2]!=0 ){
      int lim;
      lim = c.aEdit[i+1] > c.aEdit[i+2] ? c.aEdit[i+1] : c.aEdit[i+2];

      /* Assume changed lines */
      for( j=0; j<lim; j++ ){
        @ <tr>

        if( j<c.aEdit[i+1] ){
          copylimline(linebuf, &c.aFrom[iFrom+j], collim);
          @ <td class="changed lineno">%d(iFrom+j+1)</td>
          @ <td class="changed srcline">%h(linebuf)</td>
        }else{
          @ <td colspan="2" class="changedvoid"/>
        }

        @ <td class="changed">|</td>

        if( j<c.aEdit[i+2] ){
          copylimline(linebuf, &c.aTo[iTo+j], collim);
          @ <td class="changed lineno">%d(iTo+j+1)</td>
          @ <td class="changed srcline">%h(linebuf)</td>
        }else{
          @ <td colspan="2" class="changedvoid"/>
        }

        @ </tr>
      }
      iFrom+=c.aEdit[i+1];
      iTo+=c.aEdit[i+2];
    }else{

      /* Process deleted lines */
      for( j=0; j<c.aEdit[i+1]; j++ ){
        @ <tr>

        copylimline(linebuf, &c.aFrom[iFrom+j], collim);
        @ <td class="removed lineno">%d(iFrom+j+1)</td>
        @ <td class="removed srcline">%h(linebuf)</td>
        @ <td>&lt;</td>
        @ <td colspan="2" class="removedvoid"/>
        @ </tr>
      }
      iFrom+=c.aEdit[i+1];

      /* Process inserted lines */
      for( j=0; j<c.aEdit[i+2]; j++ ){
        @ <tr>
        @ <td colspan="2" class="addedvoid"/>
        @ <td>&gt;</td>
        copylimline(linebuf, &c.aTo[iTo+j], collim);
        @ <td class="added lineno">%d(iTo+j+1)</td>
        @ <td class="added srcline">%h(linebuf)</td>
        @ </tr>
      }
      iTo+=c.aEdit[i+2];
    }

    i+=3;
  }

  free(linebuf);
  free(c.aFrom);
  free(c.aTo);
  free(c.aEdit);
  return 1;
}


/*
** COMMAND: test-rawdiff
*/
void test_rawdiff_cmd(void){
  Blob a, b;
  int r;

  }
}


/*
** Append the difference between two RIDs to the output
*/
static void append_diff(const char *zFrom, const char *zTo){
  int fromid;
  int toid;
  Blob from, to, out;
  if( zFrom ){
    fromid = uuid_to_rid(zFrom, 0);
    content_get(fromid, &from);
  }else{
    blob_zero(&from);
  }
  if( zTo ){
    toid = uuid_to_rid(zTo, 0);
    content_get(toid, &to);
  }else{
    blob_zero(&to);
  }
  blob_zero(&out);
  text_diff(&from, &to, &out, DIFF_IGNORE_EOLWS | 5);
  @ %h(blob_str(&out))
  blob_reset(&from);
  blob_reset(&to);
  blob_reset(&out);  
}


/*
** Write the difference between two RIDs to the output
*/
static void generate_sbsdiff(const char *zFrom, const char *zTo){
  int fromid;
  int toid;
  Blob from, to;
  if( zFrom ){
    fromid = uuid_to_rid(zFrom, 0);
    content_get(fromid, &from);
  }else{
    blob_zero(&from);
  }
  if( zTo ){
    toid = uuid_to_rid(zTo, 0);
    content_get(toid, &to);
  }else{
    blob_zero(&to);
  }
  @ <table class="sbsdiff">
  @ <tr><th colspan="2" class="diffhdr">Old (%S(zFrom))</th><th/>
  @ <th colspan="2" class="diffhdr">New (%S(zTo))</th></tr>
  html_sbsdiff(&from, &to, 5, 1);
  @ </table>
  blob_reset(&from);
  blob_reset(&to);
}


/*
** Write a line of web-page output that shows changes that have occurred 
** to a file between two check-ins.
*/
static void append_file_change_line(
  const char *zName,    /* Name of the file that has changed */
  const char *zOld,     /* blob.uuid before change.  NULL for added files */
  const char *zNew,     /* blob.uuid after change.  NULL for deletes */
  const char *zOldName, /* Prior name.  NULL if no name change. */
  int showDiff,         /* Show edit diffs if true */
  int sideBySide,       /* Show diffs side-by-side */
  int mperm             /* executable or symlink permission for zNew */
){




  if( !g.perm.History ){
    if( zNew==0 ){
      @ <p>Deleted %h(zName)</p>
    }else if( zOld==0 ){
      @ <p>Added %h(zName)</p>
    }else if( zOldName!=0 && fossil_strcmp(zName,zOldName)!=0 ){
      @ <p>Name change from %h(zOldName) to %h(zName)
    }else if( fossil_strcmp(zNew, zOld)==0 ){
      @ <p>Execute permission %s(( mperm==PERM_EXE )?"set":"cleared")
      @  for %h(zName)</p>
    }else{
      @ <p>Changes to %h(zName)</p>
    }
    if( showDiff ){
      if( sideBySide ){
        generate_sbsdiff(zOld, zNew);
      }else{
        @ <blockquote><pre>
        append_diff(zOld, zNew);
        @ </pre></blockquote>
      }
    }
  }else{
    if( zOld && zNew ){
      if( fossil_strcmp(zOld, zNew)!=0 ){
        @ <p>Modified <a href="%s(g.zTop)/finfo?name=%T(zName)">%h(zName)</a>
        @ from <a href="%s(g.zTop)/artifact/%s(zOld)">[%S(zOld)]</a>
        @ to <a href="%s(g.zTop)/artifact/%s(zNew)">[%S(zNew)].</a>

      @ <p>Deleted <a href="%s(g.zTop)/finfo?name=%T(zName)">%h(zName)</a>
      @ version <a href="%s(g.zTop)/artifact/%s(zOld)">[%S(zOld)]</a>
    }else{
      @ <p>Added <a href="%s(g.zTop)/finfo?name=%T(zName)">%h(zName)</a>
      @ version <a href="%s(g.zTop)/artifact/%s(zNew)">[%S(zNew)]</a>
    }
    if( showDiff ){
      if( sideBySide ){
        generate_sbsdiff(zOld, zNew);
      }else{
        @ <blockquote><pre>
        append_diff(zOld, zNew);
        @ </pre></blockquote>
      }
    }else if( zOld && zNew && fossil_strcmp(zOld,zNew)!=0 ){
      @ &nbsp;&nbsp;
      @ <a href="%s(g.zTop)/fdiff?v1=%S(zOld)&amp;v2=%S(zNew)">[diff]</a>
    }
    @ </p>
  }
}

void diff_page(void){
  int v1, v2;
  int isPatch;
  int sideBySide;
  Blob c1, c2, diff, *pOut;
  char *zV1;
  char *zV2;


  login_check_credentials();
  if( !g.perm.Read ){ login_needed(); return; }
  v1 = name_to_rid_www("v1");
  v2 = name_to_rid_www("v2");
  if( v1==0 || v2==0 ) fossil_redirect_home();
  sideBySide = atoi(PD("sbs","1"));
  zV1 = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", v1);
  zV2 = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", v2);
  isPatch = P("patch")!=0;
  if( isPatch ){
    pOut = cgi_output_blob();
    cgi_set_content_type("text/plain");

  }else{
    blob_zero(&diff);
    pOut = &diff;




  }
  if( !sideBySide || isPatch ){

    content_get(v1, &c1);
    content_get(v2, &c2);
    text_diff(&c1, &c2, pOut, 4 | 0);
    blob_reset(&c1);
    blob_reset(&c2);
  }
  if( !isPatch ){
    style_header("Diff");
    style_submenu_element("Patch", "Patch", "%s/fdiff?v1=%T&v2=%T&patch",
                          g.zTop, P("v1"), P("v2"));
    if( !sideBySide ){
      style_submenu_element("Side-by-side Diff", "sbsdiff",
                            "%s/fdiff?v1=%T&v2=%T&sbs=1",
                            g.zTop, P("v1"), P("v2"));
    }else{
      style_submenu_element("Unified Diff", "udiff",
                            "%s/fdiff?v1=%T&v2=%T&sbs=0",
                            g.zTop, P("v1"), P("v2"));
    }

    @ <h2>Differences From
    @ Artifact <a href="%s(g.zTop)/artifact/%S(zV1)">[%S(zV1)]</a>:</h2>
    object_description(v1, 0, 0);
    @ <h2>To Artifact <a href="%s(g.zTop)/artifact/%S(zV2)">[%S(zV2)]</a>:</h2>
    object_description(v2, 0, 0);
    @ <hr />
    if( sideBySide ){
      generate_sbsdiff(zV1, zV2);
    }else{
      @ <blockquote><pre>
      @ %h(blob_str(&diff))
      @ </pre></blockquote>
    }
    blob_reset(&diff);
    style_footer();
  }
}

/*
** WEBPAGE: raw

@ }
@ 
@ /* The label/value pairs on (for example) the vinfo page */
@ table.label-value th {
@   vertical-align: top;
@   text-align: right;
@   padding: 0.2ex 2ex;
@ }
@
@ /* Side-by-side diff */
@ table.sbsdiff {
@   background-color: white;
@   font-family: fixed, Dejavu Sans Mono, Monaco, Lucida Console, monospace;
@   font-size: 8pt;
@   border-collapse:collapse;
@   white-space: pre;
@   width: 98%;
@   border: 1px #000 dashed;
@ }
@
@ table.sbsdiff th.diffhdr {
@   border-bottom: dotted;
@   border-width: 1px;
@ }
@
@ table.sbsdiff tr td {
@   white-space: pre;
@   padding-left: 3px;
@   padding-right: 3px;
@   margin: 0px;
@ }
@
@ table.sbsdiff tr td.lineno {
@   text-align: right;
@ }
@
@ table.sbsdiff tr td.meta {
@   color: white;
@   background-color: rgb(20, 20, 20);
@   text-align: center;
@ }
@
@ table.sbsdiff tr td.added {
@   background-color: rgb(230, 230, 230);
@ }
@
@ table.sbsdiff tr td.removed {
@   background-color: rgb(200, 200, 200);
@ }
@
@ table.sbsdiff tr td.changed {
@   background-color: rgb(220, 220, 220);
@ }');
@ REPLACE INTO config(name,mtime,value) VALUES('header',now(),'<html>
@ <head>
@ <title>$<project_name>: $<title></title>
@ <link rel="alternate" type="application/rss+xml" title="RSS Feed"
@       href="$home/timeline.rss">
@ <link rel="stylesheet" href="$home/style.css?blackwhite" type="text/css"

@ }
@ 
@ /* The label/value pairs on (for example) the ci page */
@ table.label-value th {
@   vertical-align: top;
@   text-align: right;
@   padding: 0.2ex 2ex;
@ }
@
@ /* Side-by-side diff */
@ table.sbsdiff {
@   background-color: #ffffc5;
@   font-family: fixed, Dejavu Sans Mono, Monaco, Lucida Console, monospace;
@   font-size: 8pt;
@   border-collapse:collapse;
@   white-space: pre;
@   width: 98%;
@   border: 1px #000 dashed;
@ }
@
@ table.sbsdiff th.diffhdr {
@   border-bottom: dotted;
@   border-width: 1px;
@ }
@
@ table.sbsdiff tr td {
@   white-space: pre;
@   padding-left: 3px;
@   padding-right: 3px;
@   margin: 0px;
@ }
@
@ table.sbsdiff tr td.lineno {
@   text-align: right;
@ }
@
@ table.sbsdiff tr td.meta {
@   background-color: #a09048;
@   text-align: center;
@ }
@
@ table.sbsdiff tr td.added {
@   background-color: rgb(210, 210, 100);
@ }
@
@ table.sbsdiff tr td.removed {
@   background-color: rgb(190, 200, 110);
@ }
@
@ table.sbsdiff tr td.changed {
@   background-color: rgb(200, 210, 120);
@ }');
@ REPLACE INTO config(name,mtime,value) VALUES('header',now(),'<html>
@ <head>
@ <title>$<project_name>: $<title></title>
@ <link rel="alternate" type="application/rss+xml" title="RSS Feed"
@       href="$home/timeline.rss">
@ <link rel="stylesheet" href="$home/style.css?tan" type="text/css"

@ }
@ 
@ /* The label/value pairs on (for example) the ci page */
@ table.label-value th {
@   vertical-align: top;
@   text-align: right;
@   padding: 0.2ex 2ex;
@ }
@
@ /* Side-by-side diff */
@ table.sbsdiff {
@   background-color: white;
@   font-family: fixed, Dejavu Sans Mono, Monaco, Lucida Console, monospace;
@   font-size: 6pt;
@   border-collapse:collapse;
@   white-space: pre;
@   width: 98%;
@   border: 1px #000 dashed;
@ }
@
@ table.sbsdiff th.diffhdr {
@   border-bottom: dotted;
@   border-width: 1px;
@ }
@
@ table.sbsdiff tr td {
@   white-space: pre;
@   padding-left: 3px;
@   padding-right: 3px;
@   margin: 0px;
@ }
@
@ table.sbsdiff tr td.lineno {
@   text-align: right;
@ }
@
@ table.sbsdiff tr td.meta {
@   color: white;
@   background-color: black;
@   text-align: center;
@ }
@
@ table.sbsdiff tr td.added {
@   background-color: white;
@ }
@
@ table.sbsdiff tr td.removed {
@   background-color: white;
@   text-decoration: line-through;
@ }
@
@ table.sbsdiff tr td.changed {
@   background-color: white;
@ }');
@ REPLACE INTO config(name,mtime,value) VALUES('header',now(),'<html>
@ <head>
@ <title>$<project_name>: $<title></title>
@ <link rel="alternate" type="application/rss+xml" title="RSS Feed"
@       href="$home/timeline.rss">
@ <link rel="stylesheet" href="$home/style.css?black2" type="text/css"

@ 
@ table.report tr td {
@   padding: 3px 5px;
@ }
@ 
@ textarea {
@   font-size: 1em;
@ }
@
@ /* Side-by-side diff */
@ table.sbsdiff {
@   background-color: white;
@   font-family: Dejavu Sans Mono, Monaco, Lucida Console, monospace;
@   font-size: 6pt;
@   border-collapse:collapse;
@   width: 98%;
@   border: 1px #000 dashed;
@   margin-left: auto;
@   margin-right: auto;
@ }
@
@ table.sbsdiff th.diffhdr {
@   border-bottom: dotted;
@   border-width: 1px;
@ }
@
@ table.sbsdiff tr td {
@   padding-left: 3px;
@   padding-right: 3px;
@   margin: 0px;
@   vertical-align: top;
@   white-space: pre-wrap;
@ }
@
@ table.sbsdiff tr td.lineno {
@   text-align: right;
@   /* border-bottom: 1px solid rgb(220, 220, 220); */
@ }
@
@ table.sbsdiff tr td.srcline {
@   /* max-width: 400px; */
@   /* Note: May partially hide long lines without whitespaces */
@   /* overflow: hidden; */
@   /* border-bottom: 1px solid rgb(220, 220, 220); */
@ }
@
@ table.sbsdiff tr td.meta {
@   background-color: rgb(170, 160, 255);
@   padding-top: 0.25em;
@   padding-bottom: 0.25em;
@   text-align: center;
@   -moz-border-radius: 5px;
@   -moz-border-radius: 5px;
@   -webkit-border-radius: 5px;
@   -webkit-border-radius: 5px;
@   -border-radius: 5px;
@   -border-radius: 5px;
@   border-radius: 5px;
@   border-radius: 5px;
@ }
@
@ table.sbsdiff tr td.added {
@   background-color: rgb(180, 250, 180);
@   /* border-bottom: 1px solid rgb(160, 230, 160); */
@ }
@
@ table.sbsdiff tr td.removed {
@   background-color: rgb(250, 130, 130);
@   /* border-bottom: 1px solid rgb(230, 110, 110); */
@ }
@
@ table.sbsdiff tr td.changed {
@   background-color: rgb(210, 210, 200);
@   /* border-bottom: 1px solid rgb(190, 190, 180); */
@ }');
@ REPLACE INTO config(name,mtime,value) VALUES('header',now(),'<html>
@ <head>
@ <title>$<project_name>: $<title></title>
@ <link rel="alternate" type="application/rss+xml" title="RSS Feed"
@       href="$home/timeline.rss">
@ <link rel="stylesheet" href="$home/style.css?black2" type="text/css"

@
@ /* The label/value pairs on (for example) the ci page */
@ table.label-value th {
@   vertical-align: top;
@   text-align: right;
@   padding: 0.2ex 2ex;
@ }
@
@ /* Side-by-side diff */
@ table.sbsdiff {
@   background-color: white;
@   font-family: fixed, Dejavu Sans Mono, Monaco, Lucida Console, monospace;
@   font-size: 8pt;
@   border-collapse:collapse;
@   white-space: pre;
@   width: 98%;
@   border: 1px #000 dashed;
@   margin-left: auto;
@   margin-right: auto;
@ }
@
@ table.sbsdiff th.diffhdr {
@   border-bottom: dotted;
@   border-width: 1px;
@ }
@
@ table.sbsdiff tr td {
@   white-space: pre;
@   padding-left: 3px;
@   padding-right: 3px;
@   margin: 0px;
@   vertical-align: top;
@ }
@
@ table.sbsdiff tr td.lineno {
@   text-align: right;
@ }
@
@ table.sbsdiff tr td.srcline {
@ }
@
@ table.sbsdiff tr td.meta {
@   background-color: rgb(170, 160, 255);
@   text-align: center;
@ }
@
@ table.sbsdiff tr td.added {
@   background-color: rgb(180, 250, 180);
@ }
@ table.sbsdiff tr td.addedvoid {
@   background-color: rgb(190, 190, 180);
@ }
@
@ table.sbsdiff tr td.removed {
@   background-color: rgb(250, 130, 130);
@ }
@ table.sbsdiff tr td.removedvoid {
@   background-color: rgb(190, 190, 180);
@ }
@
@ table.sbsdiff tr td.changed {
@   background-color: rgb(210, 210, 200);
@ }
@ table.sbsdiff tr td.changedvoid {
@   background-color: rgb(190, 190, 180);
@ }
@
;


/* The following table contains bits of default CSS that must
** be included if they are not found in the application-defined
** CSS.
*/