223 lines
6.2 KiB
PHP
223 lines
6.2 KiB
PHP
<?php
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namespace XFramework;
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/**
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* Roundcube Plus Framework plugin.
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*
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* Copyright 2017, Tecorama LLC.
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*
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* @license Commercial. See the LICENSE file for details.
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*/
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require_once "Singleton.php";
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class Html
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{
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use Singleton;
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/**
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* @param string $marker
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* @param string $insertString
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* @param string $html
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* @param string $container
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* @return bool
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*/
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public function insertBefore(string $marker, string $insertString, string &$html, string $container = ""): bool
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{
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if ($pos = $this->findStart($container, $marker, $html, false)) {
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$html = substr_replace($html, $insertString, $pos, 0);
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return true;
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}
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return false;
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}
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/**
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* @param string $marker
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* @param string $tagName
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* @param string $insertString
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* @param string $html
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* @param string $container
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* @return bool
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*/
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public function insertAfter(string $marker, string $tagName, string $insertString, string &$html, string $container = ""): bool
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{
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if ($pos = $this->findEnd($container, $marker, $tagName, $html)) {
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$html = substr_replace($html, $insertString, $pos, 0);
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return true;
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}
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return false;
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}
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/**
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* @param string $marker
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* @param string $insertString
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* @param string $html
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* @param string $container
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* @return bool
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*/
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public function insertAtBeginning(string $marker, string $insertString, string &$html, string $container = ""): bool
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{
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if ($pos = $this->findStart($container, $marker, $html, true)) {
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$html = substr_replace($html, $insertString, $pos, 0);
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return true;
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}
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return false;
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}
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/**
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* @param string $marker - String to search for, it can be a class or id within a tag or a text within a tag. The function
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* will search for the first tag to the left of the marker to identify the element at the end of which the
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* text should be inserted.
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* @param string $insertString - String to insert before the closing tag.
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* @param string $html - Html code to modify.
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* @return bool - True if the string has been successfully inserted, false otherwise.
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*/
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public function insertAtEnd(string $marker, string $insertString, string &$html): bool
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{
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// find marker
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if (!($i = stripos($html, $marker))) {
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return false;
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}
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// get the html element
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if (!($i = strripos(substr($html, 0, $i), "<")) || !($j = stripos($html, " ", $i))) {
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return false;
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}
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$tag = substr($html, $i + 1, $j - $i - 1);
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$count = 0;
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do {
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if (($c = stripos($html, "</$tag>", $i)) === false) {
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return false;
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}
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if (($n = stripos($html, "<$tag ", $i)) === false) {
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$n = $c + 1;
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}
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if ($c > $n) {
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$count++;
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$i = $n + 1;
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} else {
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$count--;
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$i = $c + 1;
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}
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} while ($count);
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$html = substr_replace($html, $insertString, $i - 1, 0);
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return true;
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}
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/**
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* @param string $insertString
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* @param string $html
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* WARNING: Don't use this to insert html because it causes Roundcube to re-order script tag positioning and some plugins
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* that insert their code at the end of the page might not get the scripts they expect (for example, Thunderbird labels.)
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*/
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public function insertBeforeBodyEnd(string $insertString, string &$html)
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{
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$html = str_replace("</body>", $insertString . "</body>", $html);
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}
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/**
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* @param string $insertString
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* @param string $html
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* @return bool
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*/
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public function insertAfterBodyStart(string $insertString, string &$html): bool
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{
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if (($i = strpos($html, "<body ")) !== false &&
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($j = strpos($html, ">", $i + 1))
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) {
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$html = substr_replace($html, "\n" . $insertString, $j + 1, 0);
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return true;
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}
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return false;
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}
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/**
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* @param string $insertString
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* @param string $html
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*/
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public function insertBeforeHeadEnd(string $insertString, string &$html)
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{
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$html = str_replace("</head>", $insertString . "</head>", $html);
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}
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/**
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* @param string $container
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* @param string $marker
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* @param string $html
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* @param bool $inner
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* @return bool|int
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*/
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private function findStart(string $container, string $marker, string $html, bool $inner)
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{
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if (!($pos = $this->findMarker($container, $marker, $html))) {
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return false;
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}
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if ($inner) {
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if (substr($marker, -1, 1) != ">") {
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$pos = strpos($html, ">", $pos);
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if ($pos) {
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$pos++;
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}
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}
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} else {
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// if marker doesn't include the opening tag name, find the beginning of the tag
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if (strpos($marker, "<") !== 0) {
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$pos = strrpos(substr($html, 0, $pos + 1), "<");
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}
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}
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return $pos;
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}
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/**
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* @param string $container
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* @param string $marker
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* @param string $tagName
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* @param string $html
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* @return bool|int
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*/
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private function findEnd(string $container, string $marker, string $tagName, string $html)
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{
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if (!($pos = $this->findMarker($container, $marker, $html))) {
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return false;
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}
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// find the closing tag
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$end = $pos;
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do {
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$innerTagStart = strpos($html, "<$tagName ", $end + 1);
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$end = strpos($html, "</$tagName>", $end + 1);
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} while ($end !== false && $innerTagStart !== false && $innerTagStart < $end);
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return $end + strlen("</$tagName>");
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}
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/**
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* @param string $container
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* @param string $marker
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* @param string $html
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* @return bool|int
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*/
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private function findMarker(string $container, string $marker, string $html)
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{
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$start = empty($container) ? strpos($html, "<body ") : strpos($html, $container);
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if ($start === false) {
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return false;
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}
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return strpos($html, $marker, $start);
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}
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} |