Incluye un par de parámetros modificables para que cada cual los adapte a su gusto, ya que la velocidad de lectura varía considerablemente de una persona a otra. Aquí se ha estimado que 300 palabras por minuto para una lectura relativamente comprensiva y dos segundos para cada imagen, pueden ser una media aceptable.
El código se ha construido mediante una función JavaScript que, tras definir unos parámetros, secuencialmente hace lo siguiente:
- captura el contenido del cuerpo principal del post (data:post.body) a través de una ID que habrá que asignar a cada uno
- cuenta las imágenes que se usan (img.length)
- elimina el código HTML que pueda llevar, mediante la localización de los caracteres
- normaliza los espacios en blanco duplicados, al principio y al final, para convertirlos en únicos entre palabras
- divide el texto cortando por dichos espacios blancos para contar finalmente palabras reales (split)
- calcula el tiempo que llevaría leer esas palabras en función de los parámetros fijados al principio
- devuelve un texto formateado con el cálculo resultante
//![CDATA[
var palabrasporminuto = 300;
var imagenesporminuto = 30;
function tiempolectura(id) {
var contenidopost = document.getElementById(id);
var img = contenidopost.getElementsByTagName("img");
var numimg = img.length;
var strx = contenidopost.innerHTML;
if(strx.indexOf("")!=-1) {
var s = strx.split("");
for(var i=0;is.length;i++){
if(s[i].indexOf("")!=-1){
s[i] = s[i].substring(s[i].indexOf("")+1,s[i].length);
}
}
strx = s.join("");
}
var blancoinicial = /^ /;
var blancofinal = / $/;
var blancosjuntos = /[ ]+/g;
strx = strx.replace(blancosjuntos," ");
strx = strx.replace(blancoinicial,"");
strx = strx.replace(blancofinal,"");
var palabras = strx.split(" ");
var numpalabras = palabras.length;
var minutos = parseInt((numpalabras/palabrasporminuto)+(numimg/imagenesporminuto));
var segundos = parseInt((((numpalabras/palabrasporminuto)+(numimg/imagenesporminuto))-minutos)*60);
minutos=("0" + minutos).slice (-2);
segundos=("0" + segundos).slice (-2);
var devolver = "Tiempo estimado para leer esta entrada: "+minutos+":"+segundos;
document.getElementById("tiempolec").innerHTML = devolver;
}
//
/script
Una vez montado en nuestra plantilla y ahora conExpandir plantillas de artilugios seleccionado, buscamosdata:post.body/. Tenemos que meter esta variable en unDIV que incluya unaID única, para lo cual utilizaremos una variable de las mismas que ya usa Blogger (data:post.id). Previamente, para que salga al principio del post, colocaremos un párrafo sin contenido pero conid='tiempolec'. Gracias a esaID, ese párrafo será rellenado automáticamente con el resultado del script. Por último, la llamada a la función. Tal que así:
Para cambiar el sitio dónde se mostrará el tiempo de lectura, sólo hay que reubicar el párrafop id='tiempolec'/ y dando estilo a#tiempolec, lo podéis destacar o cambiar por entero de formato.
En el primer trozo de código, los valores depalabrasporminuto eimagenesporminuto, son los que podéis cambiar a vuestro antojo. Con las palabras creo que no habrá demasiada discusión, aunque blogs con textos muy técnicos o incluso poesía, quizás deberían rebajar la cifra de 300 que yo he estimado. Pero con las imágenes ya es otra historia. Servidor ha calculado 2 segundos para cada una, lo que hace las 30 por minuto que se indican en el ejemplo.
Este es un pequeño reto que me lanzó hace unos díasPizcos y que debido a la utilidad práctica que puede tener y, sobre todo, a mi cabezonería incorregible, recogí con mucho gusto.
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