<?php
# Copyright(C) 2004-2007 INL
# Written by Victor Stinner <victor.stinner AT inl.fr>
#
# $Id: html.php 17927 2009-02-16 13:16:09Z haypo $
#
# This program 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 3 of the License.
#
#  This program 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/>.

function html_attributes($attr)
{
    $html = '';
    foreach ($attr as $key=>$value) {
        $html .= " $key=\"".htmlspecialchars($value).'"';
    }
    return $html;
}

function html_open($name, $attr=Array(), $newline=false)
{
    echo '<'.$name.html_attributes($attr).'>';
    if ($newline)
        echo "\n";
}

function html_close($name)
{
    echo "</$name>\n";
}

function html_tag($name, $attr, $content=null)
{
    echo '<'.$name.html_attributes($attr);
    if (!is_null($content)) {
        echo '>'.htmlspecialchars($content);
        echo "</$name>\n";
    } else {
        if (in_array($name, Array('img', 'hr'))) {
            /* Write <hr /> */
            echo " />\n";
        } else {
            /* Write <script (...)></script> */
            echo "></$name>\n";
        }
    }
}

function select_option($key, $value, $selected)
{
    $attr = Array('value' => $key);
    if ($selected) {
        $attr['selected'] = "selected";
    }
    html_tag('option', $attr, $value);
}

function select_array($name, $data, $selected=null, $default=null, $attr=Array())
{
    $attr['name'] = $name;
    html_open('select', $attr, true);
    if ($default)
    {
        list($key, $value) = $default;
        select_option($key, $value, is_null($selected));
    }
    foreach ($data as $key=>$value)
    {
        $is_selected = ($selected and $key == $selected);
        select_option($key, $value, $is_selected);
    }
    echo " </select>\n";
}

# Create '<a href="URL">TEXT</a>' string
function createLink($url, $text, $attr=Array(), $raw_text=false)
{
    if (!$raw_text) {
        $text = htmlspecialchars($text);
    }
    $attr['href'] = $url;
    return '<a'.html_attributes($attr).'>'.$text."</a>";
}

function select_list($name, $data, $selected=null, $default=null)
{
    $array = Array();
    foreach ($data as $item)
    {
        $array[$item] = $item;
    }
    select_array($name, $array, $selected, $default);
}

function html_checkbox($name, $checked, $label=null, $attr=Array())
{
    if (!array_key_exists('id', $attr)) {
        $attr['id'] = "checkbox_$name";
    }
    if ($checked) {
        $attr['checked'] = 'checked';
    }
    $attr = array_merge(Array('name' => $name, 'type' => 'checkbox'), $attr);
    html_tag('input', $attr, null);
    if ($label) {
        html_tag('label', Array('for' => $attr['id']), $label);
    }
}

$_html_tail_javascript = Array();
$_html_tail_include_javascript = Array();

function html_include_javascript($url, $tail=false)
{
    if ($tail) {
        global $_html_tail_include_javascript;
        $_html_tail_include_javascript[] = $url;
        return;
    }
    html_tag('script', Array(
        'type' => 'text/javascript',
        'src' => $url,
    ));
}

function html_javascript($code, $tail=false)
{
    global $_html_tail_javascript;

    if (!is_array($code)) {
        $code = Array($code);
    }
    if (count($code) == 0) {
        return;
    }
    $code[0] = ltrim($code[0]);
    $last = count($code)-1;
    $code[$last] = rtrim($code[$last]);
    if (count($code) == 1 and !$code[0]) {
        return;
    }

    if ($tail) {
        $_html_tail_javascript = array_merge($_html_tail_javascript, $code);
        return;
    }

    html_open('script', Array('type' => 'text/javascript'), true);
#    echo "<!-- ";

    if (is_array($code)) {
        foreach ($code as $line) {
            echo $line."\n";
        }
    } else {
        echo $code."\n";
    }

#    echo "-->";
    html_close('script');
}

function _html_write_tail_javascript()
{
    global $_html_tail_javascript, $_html_tail_include_javascript;
    foreach($_html_tail_include_javascript as $url) {
        html_include_javascript($url);
    }
    html_javascript($_html_tail_javascript);
    $_html_tail_javascript = Array();
    $_html_tail_include_javascript = Array();
}

function html_input_text($name, $value='', $attr=Array())
{
    $attr = array_merge(Array(
        'name' => $name,
        'value' => $value,
        'type' => 'text'
    ), $attr);
    html_open('input', $attr, true);
}

function html_hidden($name, $value, $attr=Array())
{
    $attr = array_merge(Array(
        'type' => 'hidden',
        'name' => $name,
        'value' => $value,
    ), $attr);
    html_open('input', $attr, true);
}

function html_submit($value, $attr=Array())
{
    $attr = array_merge(Array(
        'type' => 'submit',
        'value' => $value,
    ), $attr);
    html_open('input', $attr, true);
}

function html_textarea($name, $content, $cols=30, $rows=2, $attr=Array())
{
    $attr = array_merge(Array(
        'name' => $name,
        'rows' => $rows,
        'cols' => $cols,
    ), $attr);
    html_open('textarea', $attr);
    echo htmlspecialchars($content);
    html_close('textarea');
}

function html_img($src, $alt, $attr=Array())
{
    $attr['src'] = $src;
    $attr['alt'] = $alt;
    $attr['title'] = $alt;
    html_open('img', $attr, true);
}

register_shutdown_function('_html_write_tail_javascript');

?>