Question

We are building a word processor and we would like to implement a "reflow" functionality that full-justifies text.Given a maximum line width and an array containing lines of text, re-flow the text to fit the new width. Each line should be have the exact specified width. If any line is too short, insert spaces between words as equally as possible until it fits.

Answer 1

Answer:

The code is given below in Java with appropriate comments

Explanation:

Reflow is an function which helps you to justify your functionality

You need to input a string array and the max width and you will get the

output in a list(string).

public List<String> Reflow(String[] input, int width) {

   List<String> result = new ArrayList<String>();

 

   if(input==null || input.length==0){

       return result;

   }

 

 

   int count=0;

   int last=0;

   ArrayList<String> list = new ArrayList<String>();

   for(int i=0; i<input.length; i++){

       count = count + input[i].length();

 

       if(count+i-last>width){

           int wl = count-input[i].length();

           int sl = maxWidth-wl;

           int each = 1;

           int el = 0;

 

           if(i-last-1>0){

               each = sl/(i-last-1);

               el = sl%(i-last-1);

           }

 

           StringBuilder sb = new StringBuilder();

 

           for(int k=last; k<i-1; k++){

               sb.append(input[k]);

 

               int ce = 0;

               while(ce<each){

                   sb.append(" ");

                   ce++;

               }

 

               if(el>0){

                   sb.append(" ");

                   el--;

               }

           }

 

           sb.append(input[i-1]);//last input in the line

           //if only one word in this line, need to fill left with space

           while(sb.length()<width){

               sb.append(" ");

           }

 

           result.add(sb.toString());

 

           last = i;

           count=input[i].length();

       }

   }

 

   int lastLen = 0;

   StringBuilder sb = new StringBuilder();

 

   for(int i=last; i<input.length-1; i++){

       count = count+input[i].length();

       sb.append(input[i]+" ");

   }

 

   sb.append(input[input.length-1]);

   int d=0;

   while(sb.length()<maxWidth){

       sb.append(" ");

   }

   result.add(sb.toString());

 

   return result;

}