form.fileedit fieldset {
  margin: 0.5em 0 0 0;
  border-radius: 0.5em;
  border-color: inherit;
  border-width: 1px;
}
form.fileedit fieldset > legend {
  margin: 0 0 0 1em;
  padding: 0 0.5em 0 0.5em;
}
form.fileedit fieldset > div {
  margin: 0 0.25em 0.25em 0.25em;
}
form.fileedit fieldset > div > .input-with-label {

  margin: 0.25em 0.5em;
}
form.fileedit fieldset > div > button {
  margin: 0.25em 0.5em;
}
form.fileedit input:invalid {
  border-left: 0.2em dashed red;

  overflow: auto;
}
div.fileedit-preview {
  margin: 0;
  padding: 0;
}
.fileedit-preview > div:first-child {
  margin: 1em 0 0 0;
  border-bottom: 1px dashed;
}
div.fileedit-diff {
  margin: 0;
  padding: 0;
}
.fileedit-diff > div:first-child {
  border-bottom: 1px dashed;
}

.input-with-label {
  border: 1px inset #808080;
  border-radius: 0.5em;
  padding: 0.25em 0.4em;

        CX("<pre>%h</pre>", zExt+1, zContent);
      }
      break;
    }
  }
  CX("</div><!--.fileedit-preview-->\n");
}

/*
** Renders diffs for the /fileedit page. pContent is the
** locally-edited content.  frid is the RID of the file's blob entry
** from which pContent is based.  zManifestUuid is the checkin version
** to which RID belongs - it is purely informational, for labeling the
** diff view. isSbs is true for side-by-side diffs, false for unified.
*/
static void fileedit_render_diff(Blob * pContent, int frid,
                                 const char * zManifestUuid,
                                 int isSbs){
  Blob orig = empty_blob;
  Blob out = empty_blob;
  u64 diffFlags = DIFF_HTML | DIFF_NOTTOOBIG | DIFF_STRIP_EOLCR;

  content_get(frid, &orig);
  if(isSbs){
    diffFlags |=  DIFF_SIDEBYSIDE;
  }else{
    diffFlags |= DIFF_LINENO;
  }
  text_diff(&orig, pContent, &out, 0, diffFlags);
  CX("<div class='fileedit-diff'>");
  CX("<div>Diff <code>[%S]</code> &rarr; Local Edits</div>",
     zManifestUuid);
  if(isSbs){
    CX("%b",&out);
  }else{
    CX("<pre class='udiff'>%b</pre>",&out);
  }
  CX("</div><!--.fileedit-diff-->\n");
  blob_reset(&orig);
  blob_reset(&out);
  /* Wow, that was *easy*. */
}

/*
** Outputs a SELECT list from a compile-time list of integers.
** The vargs must be a list of (const char *, int) pairs, terminated
** with a single NULL. Each pair is interpreted as...
**
** If the (const char *) is NULL, it is the end of the list, else

**
** All other parameters are for internal use only, submitted via the
** form-submission process, and may change with any given revision of
** this code.
*/
void fileedit_page(){
  enum submit_modes {
  SUBMIT_NONE = 0, SUBMIT_SAVE, SUBMIT_PREVIEW,
  SUBMIT_DIFF_SBS, SUBMIT_DIFF_UNIFIED,
  SUBMIT_end /* sentinel for range validation */
  };
  const char * zFilename = PD("file",P("name"));
                                        /* filename. We'll accept 'name'
                                           because that param is handled
                                           specially by the core. */
  const char * zRev = P("r");           /* checkin version */
  const char * zContent = P("content"); /* file content */

  if( !g.perm.Write ){
    login_needed(g.anon.Write);
    return;
  }
  db_begin_transaction();
  CheckinMiniInfo_init(&cimi);
  submitMode = atoi(PD("submit","0"));
  if(submitMode < SUBMIT_NONE || submitMode >= SUBMIT_end){
    submitMode = 0;
  }
  zFlagCheck = P("comment_mimetype");
  if(zFlagCheck){
    cimi.zCommentMimetype = mprintf("%s",zFlagCheck);
    zFlagCheck = 0;
  }

                             "1",
                             "If on, plain-text files (only) will get "
                             "line numbers added to the preview.",
                             previewLn);
    }
  }
  CX("<button type='submit' name='submit' value='3'>"
     "Diff (SBS)</button>");
  CX("<button type='submit' name='submit' value='4'>"
     "Diff (Unified)</button>");
  CX("</div></fieldset>");

  /******* End of form *******/    
  CX("</form>\n");

  /* Dynamically populate the editor... */
  if(1==loadMode || (2==loadMode && submitMode>SUBMIT_NONE)){

    cimi.pMfOut = 0;
    blob_reset(&manifest);
  }else if(SUBMIT_PREVIEW==submitMode){
    int pflags = 0;
    if(previewLn) pflags |= FE_PREVIEW_LINE_NUMBERS;
    fileedit_render_preview(&cimi.fileContent, cimi.zFilename, pflags,
                            previewRenderMode, previewHtmlHeight);
  }else if(SUBMIT_DIFF_SBS==submitMode
           || SUBMIT_DIFF_UNIFIED==submitMode){
    fileedit_render_diff(&cimi.fileContent, frid, cimi.zParentUuid,
                         SUBMIT_DIFF_SBS==submitMode);
  }else{
    /* Ignore invalid submitMode value */
    goto end_footer;
  }

end_footer:
  zContent = 0;