386 lines
11 KiB
C
386 lines
11 KiB
C
/*
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* Copyright 2010 Michael Drake <tlsa@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* Generate HTML content for displaying directory listings (implementation).
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*/
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#include <stdbool.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "content/dirlist.h"
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#include "utils/messages.h"
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static const char footer[] = "</div>\n</body>\n</html>\n";
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static int dirlist_filesize_calculate(unsigned long *bytesize);
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static int dirlist_filesize_value(unsigned long bytesize);
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static char* dirlist_filesize_unit(unsigned long bytesize);
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/**
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* Generates the top part of an HTML directory listing page
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*
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* \return Top of directory listing HTML
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*
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* This is part of a series of functions. To generate a complete page,
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* call the following functions in order:
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*
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* dirlist_generate_top()
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* dirlist_generate_hide_columns() -- optional
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* dirlist_generate_title()
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* dirlist_generate_parent_link() -- optional
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* dirlist_generate_headings()
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* dirlist_generate_row() -- call 'n' times for 'n' rows
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* dirlist_generate_bottom()
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*/
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bool dirlist_generate_top(char *buffer, int buffer_length)
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{
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int error = snprintf(buffer, buffer_length,
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"<html>\n"
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"<head>\n"
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"<link rel=\"stylesheet\" title=\"Standard\" "
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"type=\"text/css\" href=\"resource:internal.css\">\n"
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"<style>\n");
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if (error < 0 || error >= buffer_length)
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/* Error or buffer too small */
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return false;
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else
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/* OK */
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return true;
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}
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/**
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* Generates the part of an HTML directory listing page that can suppress
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* particular columns
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*
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* \param flags flags for which cols to suppress. 0 to suppress none
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* \param buffer buffer to fill with generated HTML
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* \param buffer_length maximum size of buffer
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* \return true iff buffer filled without error
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*
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* This is part of a series of functions. To generate a complete page,
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* call the following functions in order:
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*
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* dirlist_generate_top()
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* dirlist_generate_hide_columns() -- optional
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* dirlist_generate_title()
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* dirlist_generate_parent_link() -- optional
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* dirlist_generate_headings()
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* dirlist_generate_row() -- call 'n' times for 'n' rows
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* dirlist_generate_bottom()
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*/
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bool dirlist_generate_hide_columns(int flags, char *buffer, int buffer_length)
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{
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int error = snprintf(buffer, buffer_length,
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"%s\n%s\n%s\n%s\n%s\n",
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(flags & DIRLIST_NO_NAME_COLUMN) ?
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"span.name { display: none; }\n" : "",
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(flags & DIRLIST_NO_TYPE_COLUMN) ?
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"span.type { display: none; }\n" : "",
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(flags & DIRLIST_NO_SIZE_COLUMN) ?
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"span.size { display: none; }\n" : "",
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(flags & DIRLIST_NO_DATE_COLUMN) ?
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"span.date { display: none; }\n" : "",
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(flags & DIRLIST_NO_TIME_COLUMN) ?
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"span.time { display: none; }\n" : "");
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if (error < 0 || error >= buffer_length)
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/* Error or buffer too small */
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return false;
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else
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/* OK */
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return true;
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}
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/**
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* Generates the part of an HTML directory listing page that contains the title
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*
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* \param title title to use
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* \param buffer buffer to fill with generated HTML
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* \param buffer_length maximum size of buffer
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* \return true iff buffer filled without error
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*
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* This is part of a series of functions. To generate a complete page,
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* call the following functions in order:
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*
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* dirlist_generate_top()
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* dirlist_generate_hide_columns() -- optional
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* dirlist_generate_title()
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* dirlist_generate_parent_link() -- optional
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* dirlist_generate_headings()
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* dirlist_generate_row() -- call 'n' times for 'n' rows
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* dirlist_generate_bottom()
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*/
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bool dirlist_generate_title(const char *title, char *buffer, int buffer_length)
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{
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int error;
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if (title == NULL)
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title = "";
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error = snprintf(buffer, buffer_length,
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"</style>\n"
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"<title>%s</title>\n"
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"</head>\n"
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"<body id=\"dirlist\">\n"
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"<h1>%s</h1>\n",
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title, title);
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if (error < 0 || error >= buffer_length)
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/* Error or buffer too small */
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return false;
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else
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/* OK */
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return true;
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}
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/**
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* Generates the part of an HTML directory listing page that links to the parent
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* directory
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*
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* \param parent url of parent directory
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* \param buffer buffer to fill with generated HTML
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* \param buffer_length maximum size of buffer
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* \return true iff buffer filled without error
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*
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* This is part of a series of functions. To generate a complete page,
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* call the following functions in order:
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*
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* dirlist_generate_top()
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* dirlist_generate_hide_columns() -- optional
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* dirlist_generate_title()
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* dirlist_generate_parent_link() -- optional
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* dirlist_generate_headings()
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* dirlist_generate_row() -- call 'n' times for 'n' rows
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* dirlist_generate_bottom()
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*/
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bool dirlist_generate_parent_link(const char *parent, char *buffer,
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int buffer_length)
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{
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int error = snprintf(buffer, buffer_length,
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"<p><a href=\"%s\">%s</a></p>",
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parent, messages_get("FileParent"));
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if (error < 0 || error >= buffer_length)
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/* Error or buffer too small */
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return false;
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else
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/* OK */
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return true;
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}
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/**
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* Generates the part of an HTML directory listing page that displays the column
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* headings
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*
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* \param buffer buffer to fill with generated HTML
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* \param buffer_length maximum size of buffer
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* \return true iff buffer filled without error
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*
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* This is part of a series of functions. To generate a complete page,
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* call the following functions in order:
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*
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* dirlist_generate_top()
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* dirlist_generate_hide_columns() -- optional
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* dirlist_generate_title()
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* dirlist_generate_parent_link() -- optional
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* dirlist_generate_headings()
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* dirlist_generate_row() -- call 'n' times for 'n' rows
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* dirlist_generate_bottom()
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*/
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bool dirlist_generate_headings(char *buffer, int buffer_length)
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{
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int error = snprintf(buffer, buffer_length,
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"<div>\n"
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"<strong>\n"
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"\t<span class=\"name\">%s</span>\n"
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"\t<span class=\"type\">%s</span>\n"
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"\t<span class=\"size\">%s</span>"
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"<span class=\"size\"></span>\n"
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"\t<span class=\"date\">%s</span>\n"
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"\t<span class=\"time\">%s</span>\n"
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"</strong>\n",
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messages_get("FileName"), messages_get("FileType"),
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messages_get("FileSize"), messages_get("FileDate"),
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messages_get("FileTime"));
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if (error < 0 || error >= buffer_length)
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/* Error or buffer too small */
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return false;
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else
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/* OK */
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return true;
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}
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/**
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* Generates the part of an HTML directory listing page that displays a row
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* in the directory contents table
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*
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* \param even evenness of row number, for alternate row colouring
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* \param directory whether this row is for a directory (or a file)
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* \param url url for row entry
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* \param name name of row entry
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* \param mimetype MIME type of row entry
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* \param size size of row entry. If negative, size is left blank
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* \param date date row entry was last modified
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* \param time time row entry was last modified
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* \param buffer buffer to fill with generated HTML
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* \param buffer_length maximum size of buffer
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* \return true iff buffer filled without error
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*
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* This is part of a series of functions. To generate a complete page,
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* call the following functions in order:
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*
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* dirlist_generate_top()
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* dirlist_generate_hide_columns() -- optional
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* dirlist_generate_title()
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* dirlist_generate_parent_link() -- optional
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* dirlist_generate_headings()
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* dirlist_generate_row() -- call 'n' times for 'n' rows
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* dirlist_generate_bottom()
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*/
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bool dirlist_generate_row(bool even, bool directory, char *url, char *name,
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const char *mimetype, long long size, char *date, char *time,
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char *buffer, int buffer_length)
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{
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const char *unit;
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char size_string[100];
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int error;
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if (size < 0) {
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unit = "";
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strncpy(size_string, "", sizeof size_string);
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} else {
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unit = messages_get(dirlist_filesize_unit((unsigned long)size));
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snprintf(size_string, sizeof size_string, "%d",
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dirlist_filesize_value((unsigned long)size));
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}
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error = snprintf(buffer, buffer_length,
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"<a href=\"%s\" class=\"%s %s\">\n"
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"\t<span class=\"name\">%s</span>\n"
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"\t<span class=\"type\">%s</span>\n"
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"\t<span class=\"size\">%s</span>"
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"<span class=\"size\">%s</span>\n"
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"\t<span class=\"date\">%s</span>\n"
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"\t<span class=\"time\">%s</span>\n"
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"</a>\n",
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url, even ? "even" : "odd",
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directory ? "dir" : "file",
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name, mimetype, size_string, unit, date, time);
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if (error < 0 || error >= buffer_length)
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/* Error or buffer too small */
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return false;
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else
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/* OK */
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return true;
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}
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/**
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* Generates the bottom part of an HTML directory listing page
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*
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* \return Bottom of directory listing HTML
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*
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* This is part of a series of functions. To generate a complete page,
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* call the following functions in order:
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*
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* dirlist_generate_top()
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* dirlist_generate_hide_columns() -- optional
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* dirlist_generate_title()
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* dirlist_generate_parent_link() -- optional
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* dirlist_generate_headings()
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* dirlist_generate_row() -- call 'n' times for 'n' rows
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* dirlist_generate_bottom()
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*/
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bool dirlist_generate_bottom(char *buffer, int buffer_length)
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{
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int error = snprintf(buffer, buffer_length,
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"</div>\n"
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"</body>\n"
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"</html>\n");
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if (error < 0 || error >= buffer_length)
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/* Error or buffer too small */
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return false;
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else
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/* OK */
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return true;
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}
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/**
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* Obtain display value and units for filesize after conversion to B/kB/MB/GB,
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* as appropriate.
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*
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* \param bytesize file size in bytes, updated to filesize in output units
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* \return number of times bytesize has been divided by 1024
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*/
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int dirlist_filesize_calculate(unsigned long *bytesize)
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{
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int i = 0;
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while (*bytesize > 1024 * 4) {
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*bytesize /= 1024;
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i++;
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if (i == 3)
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break;
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}
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return i;
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}
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/**
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* Obtain display value for filesize after conversion to B/kB/MB/GB,
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* as appropriate
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*
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* \param bytesize file size in bytes
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* \return Value to display for file size, in units given by filesize_unit()
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*/
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int dirlist_filesize_value(unsigned long bytesize)
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{
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dirlist_filesize_calculate(&bytesize);
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return (int)bytesize;
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}
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/**
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* Obtain display units for filesize after conversion to B/kB/MB/GB,
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* as appropriate
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*
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* \param bytesize file size in bytes
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* \return Units to display for file size, for value given by filesize_value()
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*/
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char* dirlist_filesize_unit(unsigned long bytesize)
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{
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const char* units[] = { "Bytes", "kBytes", "MBytes", "GBytes" };
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return (char*)units[dirlist_filesize_calculate(&bytesize)];
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}
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