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demo.html
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demo.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<title></title>
<style type="text/css">
html{
font-size: 62.5%;
}
html,body{
margin: 0 0;
padding: 0 0;
width: 100%;
height: 100%;
overflow: hidden;
}
/*#canvas{
width: 100%;
height: 100%;
}*/
#next{
/*position: fixed;
bottom: 0px;
right: 0px;
width: 20px;
height: 20px;
background: firebrick;*/
opacity: 0;
height: 30px;
position: absolute;
left: 0px;
top: 0px;
width: 1000px;
height: 1000px;
}
#before{
position: fixed;
bottom: 0px;
left: 0px;
width: 20px;
height: 20px;
background: firebrick;
opacity: 0.6;
}
.pop{
position: fixed;
bottom: 0px;
left: 0px;
height: 80px;
background: #333333;
z-index: 100;
width: 100%;
color: white;
padding: 10px 0px;
display: none;
}
.progress{
position: absolute;
width: 80%;
height: 2px;
background: white;
left: 10%;
top: 5px;
}
#progress_top{
position: absolute;
width: 10%;
height: 2px;
background: gold;
left: 10%;
top: 5px;
}
.netx-container{
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
width: 50%;
margin: auto;
position: absolute;
height: 100%;
height: 35px;
text-align: center;
line-height: 35px;
font-size: 2rem;
border: 1px solid #cacaca;
border-radius: 5px;
overflow: hidden;
}
.page-container{
border-bottom: 1px solid #CACACA;
font-size: 1.6rem;
height: 35px;
text-align: center;
}
.progress-container{
position: relative;
}
.font-container{
width: 50%;
border: 1px solid #CACACA;
border-radius: 5px;
display: flex;
}
.font-container span{
flex: 3;
box-sizing: border-box;
/*width: 33%;*/
/*float: left;*/
display: inline-block;
text-align: center;
font-size: 1.6rem;
height: 25px;
line-height: 25px;
border-left: 1px solid #CACACA;
}
.font-container span:first-child{
border-left: 0px solid #CACACA;
}
.font-container .active{
background: gold;
color: #333333;
}
.bottom-cont{
position: relative;
width: 90%;
margin: 0 auto;
margin-top: 10px;
}
.color-container{
position: absolute;
right: 10%;
top: 0px;
}
.color-container span{
width: 50%;
float: left;
display: block;
width: 25px;
height: 25px;
background: blanchedalmond;
border-radius: 50%;
border: 1px solid #CACACA;
margin-left: 10px;
}
</style>
</head>
<body>
<div class="netx-container" id="showchange">
<span >选择书籍</span>
<input type="file" name="next" id="next" value="" />
</div>
<!--<div id="next"></div>
<div id="before"></div>-->
<canvas id="canvas" >
</canvas>
<div class="pop" id="pop">
<div class="page-container">
<span id="page">1</span> / <span id="total">12</span>
<div class="progress-container">
<div class="progress"></div>
<div id="progress_top"></div>
</div>
</div>
<div class="bottom-cont">
<div class="font-container">
<span data-size="0">A-</span>
<span data-size="1" class="active">A</span>
<span data-size="2">A+</span>
</div>
<div class="color-container">
<span data-size="0"></span>
<span data-size="1" style="background: white;"></span>
</div>
</div>
</div>
<script src="js/index.js" type="text/javascript" charset="utf-8"></script>
<script src="js/lzTxt.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
var canvas = document.getElementById("canvas");
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
var winSize = {
width: window.innerWidth,
height : window.innerHeight
}
</script>
<script src="js/hidpi-canvas.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
var ctx = canvas.getContext("2d");
/*字体尺寸*/
var font = {
size: 18
}
// /*面板尺寸*/
// var panel = {
// col: Math.floor(canvas.width / font.size),//列数
// row: Math.floor(canvas.height / font.size),//行数
// space: 2,
// }
ctx.fillStyle = "black";
ctx.font = font.size + "px 微软雅黑";
// ctx.fillText("顺四方上下曰宇。宇虽有实，而无定处可求。往古来今曰宙。宙虽有增长，不知其始之所至。",0,font.size);
// var str_write = txt.t;
// var str_write_list = str_write.split("\r\n");
// lzTxt.init({
// origin_txt : txt.t,
// width : canvas.width,
// height : canvas.height
// });
//
//
// var current = 1;
// document.addEventListener("click",function(e){
// var x = e.pageX;
// var page = current;
// if(x > canvas.width / 2){
// drawImage();
// page ++;
// }else{
// drawImage();
// page --;
// }
// lzTxt.render(page) && (current = page);
// });
// lzTxt.render(1);
//
/*
* 翻页动画
*/
function drawImage(direction){
var src = canvas.toDataURL("image/png");
var img = document.createElement("img");
img.src = src;
img.width = winSize.width;
img.height = winSize.height;
img.style.position = "absolute";
img.style.top = "0px";
img.style.left = "0px";
img.style.background = "white";
document.body.appendChild(img);
var draw_inteval;
draw_inteval = setInterval(function(){
var left = img.offsetLeft;
if(direction == 1){
if(left < - winSize.width){
clearInterval(draw_inteval);
}
img.style.left = (left - canvas.width / 24) + "px";
}else if(direction == 3){
if(left > winSize.width){
clearInterval(draw_inteval);
}
img.style.left = (left + canvas.width / 24) + "px";
}
},1000 / 45);
}
function getStyle(dom,styleName){
if(dom.currentStyle){//ie
return dom.currentStyle[styleName];
}else{ //ff
var $arr=dom.ownerDocument.defaultView.getComputedStyle(dom, null);
return $arr[styleName];
}
}
/*背景和字体配色方案*/
var arr_bg = [{
bg: "blanchedalmond",
txt: "#333333"
},{
bg: "white",
txt: "#333333"
}];
var arr_bg_index = 0;//当前使用的配色方案序列
// var pop = document.getElementById("pop");
// console.log(getStyle(pop,"display"));
/*为配色方案选择添加事件*/
var span_list = document.querySelectorAll(".color-container span");
for(var i = 0 ; i < span_list.length ; ++i){
var elem = span_list[i];
elem.addEventListener("click",function(e){
e.preventDefault();
e.stopPropagation();
var index = this.getAttribute("data-size");
arr_bg_index = index;
lzTxt.re_render();//调用重绘
},false);
}
document.getElementById("next").onchange = function(e){
document.getElementById("showchange").style.display = "none";
// start_loading();//开始loging动画
var file = this.files[0];
var reader = new FileReader();
reader.readAsText(file,"gb2312");
console.time("onload");
reader.onprogress = function(e){
console.log(e.loaded / e.total);
}
reader.onload = function(e){
console.timeEnd("onload");
var result = this.result ;
console.time("init");
lzTxt.init({
origin_txt : result,
panel: {
width : winSize.width,
height : winSize.height,
},
fontSize : font.size,
// hook_page_start: start_loading,//开始分页计算
hook_page_end: function(){
lzTxt.render(1);
// end_loading();//结束loading动画
},//结束分页计算
page_draw_start: function(){
ctx.fillStyle = arr_bg[arr_bg_index].bg;
ctx.fillRect(0,0,canvas.width,canvas.height);
ctx.fillStyle = arr_bg[arr_bg_index].txt;
ctx.font = lzTxt.get_font_size() + "px 微软雅黑";
}
});
console.timeEnd("init");
var current = 1;
var pop_show = false;
/*添加全局点击事件处理*/
document.addEventListener("click",function(e){
e.preventDefault();
var x = e.pageX;
var y = e.pageY;
var pop = document.getElementById("pop");
if(getStyle(pop,"display") == "block"){
pop.style.display = "none";
return ;
}
/*点击中心区域展示配置*/
if(x < winSize.width * 0.8 && x > winSize.width * 0.2 && y > winSize.height * 0.4 && y < winSize.height * 0.6){
pop.style.display = "block";
var page = document.getElementById("page");
var total = document.getElementById("total");
var obj = lzTxt.get_progress();
page.innerHTML = obj.page;
total.innerHTML = obj.total;
var progress_top = document.getElementById("progress_top");
progress_top.style.width = (obj.page / obj.total * 100) + "%";
return ;
}
/*页面切换*/
var page = current;
if(x > winSize.width / 2){
page ++;
drawImage(1);
}else{
page --;
if(page > 0)
drawImage(3);
}
lzTxt.render(page) && (current = page);
},false);
/*为字体方案选择添加事件*/
var span_list = document.querySelectorAll(".font-container span");
for(var i = 0 ; i < span_list.length ; ++i){
var elem = span_list[i];
elem.addEventListener("click",function(e){
e.preventDefault();
// e.stopPropagation();
for(var j = 0 ; j < span_list.length ; ++j){
var elem1 = span_list[j];
elem1.className = "";
}
this.className = "active";
var index = this.getAttribute("data-size");
lzTxt.reRender(index);
},false);
};
// reader.abort();
lzTxt.render(1);
};
};
/*
*因加载文件会出现页面卡住现象，特意加上loading动画
* 经过多方测试，发现此时间段并不能绘制，仍在摸索中。。。
* 欢迎大家提供解决方案
*/
(function(){
/*绘制加载中动画*/
function draw_loading(start_angle){
ctx.clearRect(0,0,canvas.width,canvas.height);
ctx.beginPath();
ctx.fillStyle = "aquamarine";
ctx.moveTo(canvas.width / 2,canvas.height / 2);
ctx.arc(canvas.width / 2,canvas.height / 2,60,start_angle,2 * Math.PI);
ctx.fill();
ctx.beginPath();
ctx.fillStyle = "white";
ctx.moveTo(canvas.width / 2,canvas.height / 2);
ctx.arc(canvas.width / 2,canvas.height / 2,50,start_angle,2 * Math.PI);
ctx.fill();
}
var angle_invterval;
function start_loading(){
var start_ang = 0;
angle_invterval = setInterval(function(){
var angle = Math.PI * 2 * ((90 - start_ang) / 90);
draw_loading(angle);
++start_ang;
start_ang %= 90;
},1000 / 60);
draw_loading(start_ang);
}
function end_loading(){
window.clearInterval(angle_invterval);
}
window.start_loading = start_loading;
window.end_loading = end_loading;
})();
</script>
</body>
</html>