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<?php /* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: / // Copyright (c) 2007 Stefan Walk // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to // deal in the Software without restriction, including without limitation the // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or // sell copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS // IN THE SOFTWARE. // Authors: Stefan Walk <et@php.net> /* * Class to display a progressbar in the console * * @package Console_ProgressBar * @category Console * @version 0.5.2 * @author Stefan Walk <et@php.net> * @license MIT License / class Console_ProgressBar { // properties {{{ /* * Skeleton for use with sprintf / var $_skeleton; /* * The bar gets filled with this / var $_bar; /* * The width of the bar / var $_blen; /* * The total width of the display / var $_tlen; /* * The position of the counter when the job is `done' / var $_target_num; /* * Options, like the precision used to display the numbers / var $_options = array(); /* * Length to erase / var $_rlen = 0; /* * When the progress started / var $_start_time = null; var $_rate_datapoints = array(); /* * Time when the bar was last drawn / var $_last_update_time = 0.0; // }}} // constructor() {{{ /* * Constructor, sets format and size * * See the reset() method for documentation. * * @param string The format string * @param string The string filling the progress bar * @param string The string filling empty space in the bar * @param int The width of the display * @param float The target number for the bar * @param array Options for the progress bar * @see reset / function Console_ProgressBar($formatstring, $bar, $prefill, $width, $target_num, $options = array()) { $this->reset($formatstring, $bar, $prefill, $width, $target_num, $options); } // }}} // {{{ reset($formatstring, $bar, $prefill, $width, $target_num[, $options]) /* * Re-sets format and size. * * <pre> * The reset method expects 5 to 6 arguments: * - The first argument is the format string used to display the progress * bar. It may (and should) contain placeholders that the class will * replace with information like the progress bar itself, the progress in * percent, and so on. Current placeholders are: * %bar% The progress bar * %current% The current value * %max% The maximum malue (the "target" value) * %fraction% The same as %current%/%max% * %percent% The status in percent * %elapsed% The elapsed time * %estimate% An estimate of how long the progress will take * More placeholders will follow. A format string like: * "* stuff.tar %fraction% KB [%bar%] %percent%" * will lead to a bar looking like this: * "* stuff.tar 391/900 KB [=====>---------] 43.44%" * - The second argument is the string that is going to fill the progress * bar. In the above example, the string "=>" was used. If the string you * pass is too short (like "=>" in this example), the leftmost character * is used to pad it to the needed size. If the string you pass is too long, * excessive characters are stripped from the left. * - The third argument is the string that fills the "empty" space in the * progress bar. In the above example, that would be "-". If the string * you pass is too short (like "-" in this example), the rightmost * character is used to pad it to the needed size. If the string you pass * is too short, excessive characters are stripped from the right. * - The fourth argument specifies the width of the display. If the options * are left untouched, it will tell how many characters the display should * use in total. If the "absolute_width" option is set to false, it tells * how many characters the actual bar (that replaces the %bar% * placeholder) should use. * - The fifth argument is the target number of the progress bar. For * example, if you wanted to display a progress bar for a download of a * file that is 115 KB big, you would pass 115 here. * - The sixth argument optional. If passed, it should contain an array of * options. For example, passing array('absolute_width' => false) would * set the absolute_width option to false. Current options are: * * option \| def. \| meaning * -------------------------------------------------------------------- * percent_precision \| 2 \| Number of decimal places to show when * \| \| displaying the percentage. * fraction_precision \| 0 \| Number of decimal places to show when * \| \| displaying the current or target * \| \| number. * percent_pad \| ' ' \| Character to use when padding the * \| \| percentage to a fixed size. Senseful * \| \| values are ' ' and '0', but any are * \| \| possible. * fraction_pad \| ' ' \| Character to use when padding max and * \| \| current number to a fixed size. * \| \| Senseful values are ' ' and '0', but * \| \| any are possible. * width_absolute \| true \| If the width passed as an argument * \| \| should mean the total size (true) or * \| \| the width of the bar alone. * ansi_terminal \| false \| If this option is true, a better * \| \| (faster) method for erasing the bar is * \| \| used. CAUTION - this is known to cause * \| \| problems with some terminal emulators, * \| \| for example Eterm. * ansi_clear \| false \| If the bar should be cleared everytime * num_datapoints \| 5 \| How many datapoints to use to create * \| \| the estimated remaining time * min_draw_interval \| 0.0 \| If the last call to update() was less * \| \| than this amount of seconds ago, * \| \| don't update. * </pre> * * @param string The format string * @param string The string filling the progress bar * @param string The string filling empty space in the bar * @param int The width of the display * @param float The target number for the bar * @param array Options for the progress bar * @return bool / function reset($formatstring, $bar, $prefill, $width, $target_num, $options = array()) { if ($target_num == 0) { trigger_error("PEAR::Console_ProgressBar: Using a target number equal to 0 is invalid, setting to 1 instead"); $this->_target_num = 1; } else { $this->_target_num = $target_num; } $default_options = array( 'percent_precision' => 2, 'fraction_precision' => 0, 'percent_pad' => ' ', 'fraction_pad' => ' ', 'width_absolute' => true, 'ansi_terminal' => false, 'ansi_clear' => false, 'num_datapoints' => 5, 'min_draw_interval' => 0.0, ); $intopts = array(); foreach ($default_options as $key => $value) { if (!isset($options[$key])) { $intopts[$key] = $value; } else { settype($options[$key], gettype($value)); $intopts[$key] = $options[$key]; } } $this->_options = $options = $intopts; // placeholder $cur = '%2$\''.$options['fraction_pad']{0}.strlen((int)$target_num).'.' .$options['fraction_precision'].'f'; $max = $cur; $max{1} = 3; // pre php-4.3.7 %3.2f meant 3 characters before . and two after // php-4.3.7 and later it means 3 characters for the whole number if (version_compare(PHP_VERSION, '4.3.7', 'ge')) { $padding = 4 + $options['percent_precision']; } else { $padding = 3; } $perc = '%4$\''.$options['percent_pad']{0}.$padding.'.' .$options['percent_precision'].'f'; $transitions = array( '%%' => '%%', '%fraction%' => $cur.'/'.$max, '%current%' => $cur, '%max%' => $max, '%percent%' => $perc.'%%', '%bar%' => '%1$s', '%elapsed%' => '%5$s', '%estimate%' => '%6$s', ); $this->_skeleton = strtr($formatstring, $transitions); $slen = strlen(sprintf($this->_skeleton, '', 0, 0, 0, '00:00:00','00:00:00')); if ($options['width_absolute']) { $blen = $width - $slen; $tlen = $width; } else { $tlen = $width + $slen; $blen = $width; } $lbar = str_pad($bar, $blen, $bar{0}, STR_PAD_LEFT); $rbar = str_pad($prefill, $blen, substr($prefill, -1, 1)); $this->_bar = substr($lbar,-$blen).substr($rbar,0,$blen); $this->_blen = $blen; $this->_tlen = $tlen; $this->_first = true; return true; } // }}} // {{{ update($current) /* * Updates the bar with new progress information * * @param int current position of the progress counter * @return bool / function update($current) { $time = $this->_fetchTime(); $this->_addDatapoint($current, $time); if ($this->_first) { if ($this->_options['ansi_terminal']) { echo "\x1b[s"; // save cursor position } $this->_first = false; $this->_start_time = $this->_fetchTime(); $this->display($current); return; } if ($time - $this->_last_update_time < $this->_options['min_draw_interval'] and $current != $this->_target_num) { return; } $this->erase(); $this->display($current); $this->_last_update_time = $time; } // }}} // {{{ display($current) /* * Prints the bar. Usually, you don't need this method, just use update() * which handles erasing the previously printed bar also. If you use a * custom function (for whatever reason) to erase the bar, use this method. * * @param int current position of the progress counter * @return bool / function display($current) { $percent = $current / $this->_target_num; $filled = round($percent $this->_blen); $visbar = substr($this->_bar, $this->_blen - $filled, $this->_blen); $elapsed = $this->_formatSeconds( $this->_fetchTime() - $this->_start_time ); $estimate = $this->_formatSeconds($this->_generateEstimate()); $this->_rlen = printf($this->_skeleton, $visbar, $current, $this->_target_num, $percent * 100, $elapsed, $estimate ); // fix for php-versions where printf doesn't return anything if (is_null($this->_rlen)) { $this->_rlen = $this->_tlen; // fix for php versions between 4.3.7 and 5.x.y(?) } elseif ($this->_rlen < $this->_tlen) { echo str_repeat(' ', $this->_tlen - $this->_rlen); $this->_rlen = $this->_tlen; } return true; } // }}} // {{{ erase($clear = false) /** * Erases a previously printed bar. * * @param bool if the bar should be cleared in addition to resetting the * cursor position * @return bool / function erase($clear = false) { if ($this->_options['ansi_terminal'] and !$clear) { if ($this->_options['ansi_clear']) { echo "\x1b[2K\x1b[u"; // restore cursor position } else { echo "\x1b[u"; // restore cursor position } } elseif (!$clear) { echo str_repeat(chr(0x08), $this->_rlen); } else { echo str_repeat(chr(0x08), $this->_rlen), str_repeat(chr(0x20), $this->_rlen), str_repeat(chr(0x08), $this->_rlen); } } // }}} // {{{ format_seconds() /* * Returns a string containing the formatted number of seconds * * @param float The number of seconds * @return string / function _formatSeconds($seconds) { $hou = floor($seconds/3600); $min = floor(($seconds - $hou 3600) / 60); $sec = $seconds - $hou * 3600 - $min * 60; if ($hou == 0) { if (version_compare(PHP_VERSION, '4.3.7', 'ge')) { $format = '%2$02d:%3$05.2f'; } else { $format = '%2$02d:%3$02.2f'; } } elseif ($hou < 100) { $format = '%02d:%02d:%02d'; } else { $format = '%05d:%02d'; } return sprintf($format, $hou, $min, $sec); } // }}} function _fetchTime() { if (!function_exists('microtime')) { return time(); } if (version_compare(PHP_VERSION, '5.0.0', 'ge')) { return microtime(true); } return array_sum(explode(' ', microtime())); } function _addDatapoint($val, $time) { if (count($this->_rate_datapoints) == $this->_options['num_datapoints']) { array_shift($this->_rate_datapoints); } $this->_rate_datapoints[] = array( 'time' => $time, 'value' => $val, ); } function _generateEstimate() { if (count($this->_rate_datapoints) < 2) { return 0.0; } $first = $this->_rate_datapoints[0]; $last = end($this->_rate_datapoints); return ($this->_target_num - $last['value'])/($last['value'] - $first['value']) * ($last['time'] - $first['time']); } }

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