add pdf and mobi libraries

1 files changed, 249 insertions, 0 deletions

diff --git a/inc/3rdparty/libraries/send2kindle/readability.php b/inc/3rdparty/libraries/send2kindle/readability.php
new file mode 100644
index 00000000..18c2dbde
--- /dev/null
+++ b/inc/3rdparty/libraries/send2kindle/readability.php
@@ -0,0 +1,249 @@
+<?php
+/**
+ * PHP Readability
+ *
+ * Readability PHP 版本，详见
+ *      http://code.google.com/p/arc90labs-readability/
+ *
+ * ChangeLog:
+ *
+ *      [+] 2011-02-17 初始化版本
+ *
+ * @author mingcheng<i.feelinglucky#gmail.com>
+ * @date   2011-02-17
+ * @link   http://www.gracecode.com/
+ */
+
+define("READABILITY_VERSION", 0.12);
+
+class Readability2 {
+    // 保存判定结果的标记位名称
+    const ATTR_CONTENT_SCORE = "contentScore";
+
+    // DOM 解析类目前只支持 UTF-8 编码
+    const DOM_DEFAULT_CHARSET = "utf-8";
+
+    // 当判定失败时显示的内容
+    const MESSAGE_CAN_NOT_GET = "Sorry, readability was unable to parse this page for content.  \n
+            If you feel like it should have been able to, 
+            please let me know by mail: lucky[at]gracecode.com";
+
+    // DOM 解析类（PHP5 已内置）
+    protected $DOM = null;
+
+    // 需要解析的源代码
+    protected $source = "";
+
+    // 章节的父元素列表
+    private $parentNodes = array();
+
+    // 需要删除的标签
+    private $junkTags = Array("style", "form", "iframe", "script", "button", "input", "textarea");
+
+    // 需要删除的属性
+    private $junkAttrs = Array("style", "class", "onclick", "onmouseover", "align", "border", "margin");
+
+
+    /**
+     * 构造函数
+     *      @param $input_char 字符串的编码。默认 utf-8，可以省略
+     */
+    function __construct($source, $input_char = "utf-8") {
+        $this->source = $source;
+
+        // DOM 解析类只能处理 UTF-8 格式的字符
+        $source = mb_convert_encoding($source, 'HTML-ENTITIES', $input_char);
+
+        // 预处理 HTML 标签，剔除冗余的标签等
+        $source = $this->preparSource($source);
+
+        // 生成 DOM 解析类
+        $this->DOM = new DOMDocument('1.0', $input_char);
+        try {
+            //libxml_use_internal_errors(true);
+            // 会有些错误信息，不过不要紧 :^)
+            if (!@$this->DOM->loadHTML('<?xml encoding="'.Readability2::DOM_DEFAULT_CHARSET.'">'.$source)) {
+                throw new Exception("Parse HTML Error!");
+            }
+
+            foreach ($this->DOM->childNodes as $item) {
+                if ($item->nodeType == XML_PI_NODE) {
+                    $this->DOM->removeChild($item); // remove hack
+                }
+            }
+
+            // insert proper
+            $this->DOM->encoding = Readability2::DOM_DEFAULT_CHARSET;
+        } catch (Exception $e) {
+            // ...
+        }
+    }
+
+
+    /**
+     * 预处理 HTML 标签，使其能够准确被 DOM 解析类处理
+     *
+     * @return String
+     */
+    private function preparSource($string) {
+        // 剔除多余的 HTML 编码标记，避免解析出错
+        preg_match("/charset=([\w|\-]+);?/", $string, $match);
+        if (isset($match[1])) {
+            $string = preg_replace("/charset=([\w|\-]+);?/", "", $string, 1);
+        }
+
+        // Replace all doubled-up <BR> tags with <P> tags, and remove fonts.
+        $string = preg_replace("/<br\/?>[ \r\n\s]*<br\/?>/i", "</p><p>", $string);
+        $string = preg_replace("/<\/?font[^>]*>/i", "", $string);
+
+        return trim($string);
+    }
+
+
+    /**
+     * 删除 DOM 元素中所有的 $TagName 标签
+     *
+     * @return DOMDocument
+     */
+    private function removeJunkTag($RootNode, $TagName) {
+        $Tags = $RootNode->getElementsByTagName($TagName);
+
+        $i = 0;
+        while($Tag = $Tags->item($i++)) {
+            $parentNode = $Tag->parentNode;
+            $parentNode->removeChild($Tag);
+        }
+
+        return $RootNode;
+    }
+
+    /**
+     * 删除元素中所有不需要的属性
+     */
+    private function removeJunkAttr($RootNode, $Attr) {
+        $Tags = $RootNode->getElementsByTagName("*");
+
+        $i = 0;
+        while($Tag = $Tags->item($i++)) {
+            $Tag->removeAttribute($Attr);
+        }
+
+        return $RootNode;
+    }
+
+    /**
+     * 根据评分获取页面主要内容的盒模型
+     *      判定算法来自：http://code.google.com/p/arc90labs-readability/
+     *
+     * @return DOMNode
+     */
+    private function getTopBox() {
+        // 获得页面所有的章节
+        $allParagraphs = $this->DOM->getElementsByTagName("p");
+
+        // Study all the paragraphs and find the chunk that has the best score.
+        // A score is determined by things like: Number of <p>'s, commas, special classes, etc.
+        $i = 0;
+        while($paragraph = $allParagraphs->item($i++)) {
+            $parentNode   = $paragraph->parentNode;
+            $contentScore = intval($parentNode->getAttribute(Readability2::ATTR_CONTENT_SCORE));
+            $className    = $parentNode->getAttribute("class");
+            $id           = $parentNode->getAttribute("id");
+
+            // Look for a special classname
+            if (preg_match("/(comment|meta|footer|footnote)/i", $className)) {
+                $contentScore -= 50;
+            } else if(preg_match(
+                "/((^|\\s)(post|hentry|entry[-]?(content|text|body)?|article[-]?(content|text|body)?)(\\s|$))/i",
+                $className)) {
+                $contentScore += 25;
+            }
+
+            // Look for a special ID
+            if (preg_match("/(comment|meta|footer|footnote)/i", $id)) {
+                $contentScore -= 50;
+            } else if (preg_match(
+                "/^(post|hentry|entry[-]?(content|text|body)?|article[-]?(content|text|body)?)$/i",
+                $id)) {
+                $contentScore += 25;
+            }
+
+            // Add a point for the paragraph found
+            // Add points for any commas within this paragraph
+            if (strlen($paragraph->nodeValue) > 10) {
+                $contentScore += strlen($paragraph->nodeValue);
+            }
+
+            // 保存父元素的判定得分
+            $parentNode->setAttribute(Readability2::ATTR_CONTENT_SCORE, $contentScore);
+
+            // 保存章节的父元素，以便下次快速获取
+            array_push($this->parentNodes, $parentNode);
+        }
+
+        $topBox = $this->DOM->createElement('div', Readability2::MESSAGE_CAN_NOT_GET);
+        // Assignment from index for performance. 
+        //     See http://www.peachpit.com/articles/article.aspx?p=31567&seqNum=5 
+        for ($i = 0, $len = sizeof($this->parentNodes); $i < $len; $i++) {
+            $parentNode      = $this->parentNodes[$i];
+            $contentScore    = intval($parentNode->getAttribute(Readability2::ATTR_CONTENT_SCORE));
+            $orgContentScore = intval($topBox->getAttribute(Readability2::ATTR_CONTENT_SCORE));
+
+            if ($contentScore && $contentScore > $orgContentScore) {
+                $topBox = $parentNode;
+            }
+        }
+
+        // 此时，$topBox 应为已经判定后的页面内容主元素
+        return $topBox;
+    }
+
+
+    /**
+     * 获取 HTML 页面标题
+     *
+     * @return String
+     */
+    public function getTitle() {
+        $title = $this->DOM->getElementsByTagName("title");
+        return $title->item(0);
+    }
+
+
+    /**
+     * 获取页面的主要内容（Readability 以后的内容）
+     *
+     * @return Array
+     */
+    public function getContent() {
+        if (!$this->DOM) return false;
+
+        // 获取页面标题
+        $ContentTitle = $this->getTitle();
+
+        // 获取页面主内容
+        $ContentBox = $this->getTopBox();
+
+        // 复制内容到新的 DOMDocument
+        $Target = new DOMDocument;
+        $Target->appendChild($Target->importNode($ContentBox, true));
+
+        // 删除不需要的标签
+        foreach ($this->junkTags as $tag) {
+            $Target = $this->removeJunkTag($Target, $tag);
+        }
+
+        // 删除不需要的属性
+        foreach ($this->junkAttrs as $attr) {
+            $Target = $this->removeJunkAttr($Target, $attr);
+        }
+
+        // 多个数据，以数组的形式返回
+        return Array(
+            'title'   => $ContentTitle ? $ContentTitle->nodeValue : "",
+            'content' => $Target->saveHTML()
+        );
+    }
+
+    function __destruct() { }
+}