文字處理與數值的抓取

edited 十月 2013 in Javascript
想問下面的問題:

<a href="xxx?xxx1=xxx&xxx2=xxx">XXX</a>

我想抓取 href 的值,並且分析 ?xxx1=xxx&xxx2=xxx
變成 var xxx1 = xxx 這樣子的數值

順帶問 即見即所得 編輯器的製作方法。

原始討論: http://twpug.net/x/modules/newbb/viewtopic.php?topic_id=3395

評論

  • edited 五月 2008
    1. 不確定透過 javascript 如何做到,在 PHP 中會使用樣式比對相關函數(preg_*)
    2. 現成的應該找找就有(tinymce, fckeditor, ...),從頭開始寫也許從現成的去研究會比較快
  • edited 五月 2008
    抓取 href 的值是用

    document.getElementById("xxx").href 嗎?

    我想順帶問,能抓取 圖片 的寬與高嗎?

    我忘記問這個部分了!


    ↓下面這些程式碼以我目前的技術還有很多看不懂
    我問的東西 Thickbox 都有做到...
    可以的話能順便解釋一下內容嗎?
    /*
     * Thickbox 3.1 - One Box To Rule Them All.
     * By Cody Lindley (http://www.codylindley.com)
     * Copyright (c) 2007 cody lindley
     * Licensed under the MIT License: http://www.opensource.org/licenses/mit-license.php
    */
    		  
    var tb_pathToImage = "image/loadingAnimation.gif";
    
    /*!!!!!!!!!!!!!!!!! edit below this line at your own risk !!!!!!!!!!!!!!!!!!!!!!!*/
    
    //on page load call tb_init
    $(document).ready(function(){   
    	tb_init('a.thickbox, area.thickbox, input.thickbox');//pass where to apply thickbox
    	imgLoader = new Image();// preload image
    	imgLoader.src = tb_pathToImage;
    });
    
    //add thickbox to href & area elements that have a class of .thickbox
    function tb_init(domChunk){
    	$(domChunk).click(function(){
    	var t = this.title || this.name || null;
    	var a = this.href || this.alt;
    	var g = this.rel || false;
    	tb_show(t,a,g);
    	this.blur();
    	return false;
    	});
    }
    
    function tb_show(caption, url, imageGroup) {//function called when the user clicks on a thickbox link
    
    	try {
    		if (typeof document.body.style.maxHeight === "undefined") {//if IE 6
    			$("body","html").css({height: "100%", width: "100%"});
    			$("html").css("overflow","hidden");
    			if (document.getElementById("TB_HideSelect") === null) {//iframe to hide select elements in ie6
    				$("body").append("<iframe id='TB_HideSelect'></iframe><div id='TB_overlay'></div><div id='TB_window'></div>");
    				$("#TB_overlay").click(tb_remove);
    			}
    		}else{//all others
    			if(document.getElementById("TB_overlay") === null){
    				$("body").append("<div id='TB_overlay'></div><div id='TB_window'></div>");
    				$("#TB_overlay").click(tb_remove);
    			}
    		}
    		
    		if(tb_detectMacXFF()){
    			$("#TB_overlay").addClass("TB_overlayMacFFBGHack");//use png overlay so hide flash
    		}else{
    			$("#TB_overlay").addClass("TB_overlayBG");//use background and opacity
    		}
    		
    		if(caption===null){caption="";}
    		$("body").append("<div id='TB_load'><img src='"+imgLoader.src+"' /></div>");//add loader to the page
    		$('#TB_load').show();//show loader
    		
    		var baseURL;
    	   if(url.indexOf("?")!==-1){ //ff there is a query string involved
    			baseURL = url.substr(0, url.indexOf("?"));
    	   }else{ 
    	   		baseURL = url;
    	   }
    	   
    	   var urlString = /\.jpg$|\.jpeg$|\.png$|\.gif$|\.bmp$/;
    	   var urlType = baseURL.toLowerCase().match(urlString);
    
    		if(urlType == '.jpg' || urlType == '.jpeg' || urlType == '.png' || urlType == '.gif' || urlType == '.bmp'){//code to show images
    				
    			TB_PrevCaption = "";
    			TB_PrevURL = "";
    			TB_PrevHTML = "";
    			TB_NextCaption = "";
    			TB_NextURL = "";
    			TB_NextHTML = "";
    			TB_imageCount = "";
    			TB_FoundURL = false;
    			if(imageGroup){
    				TB_TempArray = $("a[@rel=";+imageGroup+"]").get();
    				for (TB_Counter = 0; ((TB_Counter < TB_TempArray.length) && (TB_NextHTML === "")); TB_Counter++) {
    					var urlTypeTemp = TB_TempArray[TB_Counter].href.toLowerCase().match(urlString);
    						if (!(TB_TempArray[TB_Counter].href == url)) {						
    							if (TB_FoundURL) {
    								TB_NextCaption = TB_TempArray[TB_Counter].title;
    								TB_NextURL = TB_TempArray[TB_Counter].href;
    								TB_NextHTML = "<span id='TB_next'>&nbsp;&nbsp;<a href='#'>Next &gt;</a></span>";
    							} else {
    								TB_PrevCaption = TB_TempArray[TB_Counter].title;
    								TB_PrevURL = TB_TempArray[TB_Counter].href;
    								TB_PrevHTML = "<span id='TB_prev'>&nbsp;&nbsp;<a href='#'>&lt; Prev</a></span>";
    							}
    						} else {
    							TB_FoundURL = true;
    							TB_imageCount = "Image " + (TB_Counter + 1) +" of "+ (TB_TempArray.length);											
    						}
    				}
    			}
    
    			imgPreloader = new Image();
    			imgPreloader.onload = function(){		
    			imgPreloader.onload = null;
    				
    			// Resizing large images - orginal by Christian Montoya edited by me.
    			var pagesize = tb_getPageSize();
    			var x = pagesize[0] - 150;
    			var y = pagesize[1] - 150;
    			var imageWidth = imgPreloader.width;
    			var imageHeight = imgPreloader.height;
    			if (imageWidth > x) {
    				imageHeight = imageHeight * (x / imageWidth); 
    				imageWidth = x; 
    				if (imageHeight > y) { 
    					imageWidth = imageWidth * (y / imageHeight); 
    					imageHeight = y; 
    				}
    			} else if (imageHeight > y) { 
    				imageWidth = imageWidth * (y / imageHeight); 
    				imageHeight = y; 
    				if (imageWidth > x) { 
    					imageHeight = imageHeight * (x / imageWidth); 
    					imageWidth = x;
    				}
    			}
    			// End Resizing
    			
    			TB_WIDTH = imageWidth + 30;
    			TB_HEIGHT = imageHeight + 60;
    			$("#TB_window").append("<a href='' id='TB_ImageOff' title='Close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + TB_imageCount + TB_PrevHTML + TB_NextHTML + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a> or Esc Key</div>"); 		
    			
    			$("#TB_closeWindowButton").click(tb_remove);
    			
    			if (!(TB_PrevHTML === "")) {
    				function goPrev(){
    					if($(document).unbind("click",goPrev)){$(document).unbind("click",goPrev);}
    					$("#TB_window").remove();
    					$("body").append("<div id='TB_window'></div>");
    					tb_show(TB_PrevCaption, TB_PrevURL, imageGroup);
    					return false;	
    				}
    				$("#TB_prev").click(goPrev);
    			}
    			
    			if (!(TB_NextHTML === "")) {		
    				function goNext(){
    					$("#TB_window").remove();
    					$("body").append("<div id='TB_window'></div>");
    					tb_show(TB_NextCaption, TB_NextURL, imageGroup);				
    					return false;	
    				}
    				$("#TB_next").click(goNext);
    				
    			}
    
    			document.onkeydown = function(e){ 	
    				if (e == null) { // ie
    					keycode = event.keyCode;
    				} else { // mozilla
    					keycode = e.which;
    				}
    				if(keycode == 27){ // close
    					tb_remove();
    				} else if(keycode == 190){ // display previous image
    					if(!(TB_NextHTML == "")){
    						document.onkeydown = "";
    						goNext();
    					}
    				} else if(keycode == 188){ // display next image
    					if(!(TB_PrevHTML == "")){
    						document.onkeydown = "";
    						goPrev();
    					}
    				}	
    			};
    			
    			tb_position();
    			$("#TB_load").remove();
    			$("#TB_ImageOff").click(tb_remove);
    			$("#TB_window").css({display:"block"}); //for safari using css instead of show
    			};
    			
    			imgPreloader.src = url;
    		}else{//code to show html
    			
    			var queryString = url.replace(/^[^\?]+\??/,'');
    			var params = tb_parseQuery( queryString );
    
    			TB_WIDTH = (params['width']*1) + 30 || 630; //defaults to 630 if no paramaters were added to URL
    			TB_HEIGHT = (params['height']*1) + 40 || 440; //defaults to 440 if no paramaters were added to URL
    			ajaxContentW = TB_WIDTH - 30;
    			ajaxContentH = TB_HEIGHT - 45;
    			
    			if(url.indexOf('TB_iframe') != -1){// either iframe or ajax window		
    					urlNoQuery = url.split('TB_');
    					$("#TB_iframeContent").remove();
    					if(params['modal'] != "true"){//iframe no modal
    						$("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a> or Esc Key</div></div><iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent"+Math.round(Math.random()*1000)+"' onload='tb_showIframe()' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;' > </iframe>");
    					}else{//iframe modal
    					$("#TB_overlay").unbind();
    						$("#TB_window").append("<iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent"+Math.round(Math.random()*1000)+"' onload='tb_showIframe()' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;'> </iframe>");
    					}
    			}else{// not an iframe, ajax
    					if($("#TB_window").css("display") != "block"){
    						if(params['modal'] != "true"){//ajax no modal
    						$("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>close</a> or Esc Key</div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px'></div>");
    						}else{//ajax modal
    						$("#TB_overlay").unbind();
    						$("#TB_window").append("<div id='TB_ajaxContent' class='TB_modal' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>");	
    						}
    					}else{//this means the window is already up, we are just loading new content via ajax
    						$("#TB_ajaxContent")[0].style.width = ajaxContentW +"px";
    						$("#TB_ajaxContent")[0].style.height = ajaxContentH +"px";
    						$("#TB_ajaxContent")[0].scrollTop = 0;
    						$("#TB_ajaxWindowTitle").html(caption);
    					}
    			}
    					
    			$("#TB_closeWindowButton").click(tb_remove);
    			
    				if(url.indexOf('TB_inline') != -1){	
    					$("#TB_ajaxContent").append($('#' + params['inlineId']).children());
    					$("#TB_window").unload(function () {
    						$('#' + params['inlineId']).append( $("#TB_ajaxContent").children() ); // move elements back when you're finished
    					});
    					tb_position();
    					$("#TB_load").remove();
    					$("#TB_window").css({display:"block"}); 
    				}else if(url.indexOf('TB_iframe') != -1){
    					tb_position();
    					if($.browser.safari){//safari needs help because it will not fire iframe onload
    						$("#TB_load").remove();
    						$("#TB_window").css({display:"block"});
    					}
    				}else{
    					$("#TB_ajaxContent").load(url += "&random=" + (new Date().getTime()),function(){//to do a post change this load method
    						tb_position();
    						$("#TB_load").remove();
    						tb_init("#TB_ajaxContent a.thickbox");
    						$("#TB_window").css({display:"block"});
    					});
    				}
    			
    		}
    
    		if(!params['modal']){
    			document.onkeyup = function(e){ 	
    				if (e == null) { // ie
    					keycode = event.keyCode;
    				} else { // mozilla
    					keycode = e.which;
    				}
    				if(keycode == 27){ // close
    					tb_remove();
    				}	
    			};
    		}
    		
    	} catch(e) {
    		//nothing here
    	}
    }
    
    //helper functions below
    function tb_showIframe(){
    	$("#TB_load").remove();
    	$("#TB_window").css({display:"block"});
    }
    
    function tb_remove() {
     	$("#TB_imageOff").unbind("click");
    	$("#TB_closeWindowButton").unbind("click");
    	$("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay,#TB_HideSelect').trigger("unload").unbind().remove();});
    	$("#TB_load").remove();
    	if (typeof document.body.style.maxHeight == "undefined") {//if IE 6
    		$("body","html").css({height: "auto", width: "auto"});
    		$("html").css("overflow","");
    	}
    	document.onkeydown = "";
    	document.onkeyup = "";
    	return false;
    }
    
    function tb_position() {
    $("#TB_window").css({marginLeft: '-' + parseInt((TB_WIDTH / 2),10) + 'px', width: TB_WIDTH + 'px'});
    	if ( !(jQuery.browser.msie && jQuery.browser.version < 7)) { // take away IE6
    		$("#TB_window").css({marginTop: '-' + parseInt((TB_HEIGHT / 2),10) + 'px'});
    	}
    }
    
    function tb_parseQuery ( query ) {
       var Params = {};
       if ( ! query ) {return Params;}// return empty object
       var Pairs = query.split(/[;&]/);
       for ( var i = 0; i < Pairs.length; i++ ) {
          var KeyVal = Pairs[i].split('=');
          if ( ! KeyVal || KeyVal.length != 2 ) {continue;}
          var key = unescape( KeyVal[0] );
          var val = unescape( KeyVal[1] );
          val = val.replace(/\+/g, ' ');
          Params[key] = val;
       }
       return Params;
    }
    
    function tb_getPageSize(){
    	var de = document.documentElement;
    	var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
    	var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;
    	arrayPageSize = [w,h];
    	return arrayPageSize;
    }
    
    function tb_detectMacXFF() {
      var userAgent = navigator.userAgent.toLowerCase();
      if (userAgent.indexOf('mac') != -1 && userAgent.indexOf('firefox')!=-1) {
        return true;
      }
    }
    
    
    
  • edited 五月 2008
    這個範例中,抓取 href 的值也許是透過 jquery 進行,抓取 圖片 的寬與高已經在程式碼中,有抓出來試過:
    <script>
    imgPreloader = new Image();
    imgPreloader.src = "image/s7.jpg";
    alert(imgPreloader.width);
    </script>
    

    其他的,就自己花時間閱讀吧。
  • edited 五月 2008
    以下方法可以試試 我沒試過
    var target = document.getElementById("target_id");
    var url = document.getAttribute("href");
    然後再對url進行處理就可以了
  • edited 五月 2008
    補充一下,要分析網址後面的參數,應該透過String的split函數就很容易做。"?"跟"&"都是url的keyword,所以合法的url透過這幾個一定可以拆得開。
  • edited 五月 2008
    又有問題了 (呆)

    之前用 CSS + 圖片寬高抓取 做出DIV置中
    不過如果超出畫面,就會被撐開。
    請問有沒有方法抓取瀏覽器能顯示的畫面然後設定 DIV 區塊呢?

    (還是就直接判斷寬高,然後設定 CSS 的 TOP & LEFT 就好?)
    ↑寬高判斷好像還是需要先知道瀏覽器所能顯示的畫面 (呆)
  • edited 五月 2008
  • edited 五月 2008
    因為不 會用到這麼多功能,所以不想用。

    prototype 我在學AJAX的時候,書上有寫到。

    而且我很喜歡自己慢慢研究&問人做出來的網站。

    所以才會在這邊問問題不去用現成的...
  • edited 五月 2008
    可顯示頁面的寬度(會隨著瀏覽器視窗大小改變)就在tb_getPageSize()函數裡面阿。
  • edited 五月 2008
    var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
    var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;

    ↑我知道是這兩行,可是我不能理解為什麼要用 || 而且一共有 4 個值,最後會用到哪一個?
  • edited 五月 2008
    在 JavaScript 中, || 其中一個用法為:當左邊的值為 undefined 時,就採用右邊的值;所以上面那行會視瀏覽器的支援程度,來決定要採用的寬高值。
  • edited 五月 2008
    恩恩...了解

    還有,我想問

    overflow-x 的 CSS 值,可以在 Function 運作時才變成 scroll 嗎?

    我有嘗試設定,但是失敗了...
  • edited 五月 2008
    你的意思是說,把
    $("html").css("overflow","hidden");
    
    改成
    $("html").css("overflow","scroll");
    
    嗎?
  • edited 五月 2008
    另一個要點, CSS 屬性如果是 abc-def 這種命名格式的話,在 JavaScript 中,要改用 abcDef

    以上面的 overflow-x 為例:
    var div = document.getElementsByTagName('div')[0];
    div.style.overflowX = 'scroll';
    

    但在 jQuery 裡, overflow-x 或是 overflowX 都是能接受的,請參考 fillano 的範例。
  • edited 五月 2008
    document.body.style.overflowX = 'scroll';

    ↑我只是想單純的在 Run Function 時讓這生效
    另一個則是
    document.body.style.overflowX = 'hidden';

    Ps. CSS 檔案預設 overflow-x:hidden;
    且 JavaScript 只能放在 body 內,無法放到 head
    (我前面有說我把 JavaScript 寫在 yam blog ...)
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