diff options
Diffstat (limited to 'content/fetchers/about/imagecache.c')
| -rw-r--r-- | content/fetchers/about/imagecache.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/content/fetchers/about/imagecache.c b/content/fetchers/about/imagecache.c new file mode 100644 index 000000000..5e2abcb1e --- /dev/null +++ b/content/fetchers/about/imagecache.c @@ -0,0 +1,174 @@ +/* + * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org> + * + * This file is part of NetSurf. + * + * NetSurf is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * NetSurf is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/** + * \file + * content generator for the about scheme imagecache page + */ + +#include <stdbool.h> +#include <stdio.h> + +#include "netsurf/types.h" + +#include "image/image_cache.h" + +#include "private.h" +#include "imagecache.h" + +/* exported interface documented in about/imagecache.h */ +bool fetch_about_imagecache_handler(struct fetch_about_context *ctx) +{ + char buffer[2048]; /* output buffer */ + int code = 200; + int slen; + unsigned int cent_loop = 0; + int elen = 0; /* entry length */ + nserror res; + bool even = false; + + /* content is going to return ok */ + fetch_about_set_http_code(ctx, code); + + /* content type */ + if (fetch_about_send_header(ctx, "Content-Type: text/html")) + goto fetch_about_imagecache_handler_aborted; + + /* page head */ + res = fetch_about_ssenddataf(ctx, + "<html>\n<head>\n" + "<title>Image Cache Status</title>\n" + "<link rel=\"stylesheet\" type=\"text/css\" " + "href=\"resource:internal.css\">\n" + "</head>\n" + "<body id =\"cachelist\" class=\"ns-even-bg ns-even-fg ns-border\">\n" + "<h1 class=\"ns-border\">Image Cache Status</h1>\n"); + if (res != NSERROR_OK) { + goto fetch_about_imagecache_handler_aborted; + } + + /* image cache summary */ + slen = image_cache_snsummaryf(buffer, sizeof(buffer), + "<p>Configured limit of %a hysteresis of %b</p>\n" + "<p>Total bitmap size in use %c (in %d)</p>\n" + "<p>Age %es</p>\n" + "<p>Peak size %f (in %g)</p>\n" + "<p>Peak image count %h (size %i)</p>\n" + "<p>Cache total/hit/miss/fail (counts) %j/%k/%l/%m " + "(%pj%%/%pk%%/%pl%%/%pm%%)</p>\n" + "<p>Cache total/hit/miss/fail (size) %n/%o/%q/%r " + "(%pn%%/%po%%/%pq%%/%pr%%)</p>\n" + "<p>Total images never rendered: %s " + "(includes %t that were converted)</p>\n" + "<p>Total number of excessive conversions: %u " + "(from %v images converted more than once)" + "</p>\n" + "<p>Bitmap of size %w had most (%x) conversions</p>\n" + "<h2 class=\"ns-border\">Current contents</h2>\n"); + if (slen >= (int) (sizeof(buffer))) { + goto fetch_about_imagecache_handler_aborted; /* overflow */ + } + + res = fetch_about_senddata(ctx, (const uint8_t *)buffer, slen); + if (res != NSERROR_OK) { + goto fetch_about_imagecache_handler_aborted; + } + + /* image cache entry table */ + res = fetch_about_ssenddataf(ctx, "<p class=\"imagecachelist\">\n" + "<strong>" + "<span>Entry</span>" + "<span>Content Key</span>" + "<span>Redraw Count</span>" + "<span>Conversion Count</span>" + "<span>Last Redraw</span>" + "<span>Bitmap Age</span>" + "<span>Bitmap Size</span>" + "<span>Source</span>" + "</strong>\n"); + if (res != NSERROR_OK) { + goto fetch_about_imagecache_handler_aborted; + } + + slen = 0; + do { + if (even) { + elen = image_cache_snentryf(buffer + slen, + sizeof buffer - slen, + cent_loop, + "<a href=\"%U\">" + "<span class=\"ns-border\">%e</span>" + "<span class=\"ns-border\">%k</span>" + "<span class=\"ns-border\">%r</span>" + "<span class=\"ns-border\">%c</span>" + "<span class=\"ns-border\">%a</span>" + "<span class=\"ns-border\">%g</span>" + "<span class=\"ns-border\">%s</span>" + "<span class=\"ns-border\">%o</span>" + "</a>\n"); + } else { + elen = image_cache_snentryf(buffer + slen, + sizeof buffer - slen, + cent_loop, + "<a class=\"ns-odd-bg\" href=\"%U\">" + "<span class=\"ns-border\">%e</span>" + "<span class=\"ns-border\">%k</span>" + "<span class=\"ns-border\">%r</span>" + "<span class=\"ns-border\">%c</span>" + "<span class=\"ns-border\">%a</span>" + "<span class=\"ns-border\">%g</span>" + "<span class=\"ns-border\">%s</span>" + "<span class=\"ns-border\">%o</span>" + "</a>\n"); + } + if (elen <= 0) + break; /* last option */ + + if (elen >= (int) (sizeof buffer - slen)) { + /* last entry would not fit in buffer, submit buffer */ + res = fetch_about_senddata(ctx, + (const uint8_t *)buffer, + slen); + if (res != NSERROR_OK) { + goto fetch_about_imagecache_handler_aborted; + } + + slen = 0; + } else { + /* normal addition */ + slen += elen; + cent_loop++; + even = !even; + } + } while (elen > 0); + + slen += snprintf(buffer + slen, sizeof buffer - slen, + "</p>\n</body>\n</html>\n"); + + res = fetch_about_senddata(ctx, (const uint8_t *)buffer, slen); + if (res != NSERROR_OK) { + goto fetch_about_imagecache_handler_aborted; + } + + fetch_about_send_finished(ctx); + + return true; + +fetch_about_imagecache_handler_aborted: + return false; +} |