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netsurf/content/dirlist.c

387 lines
11 KiB
C

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