Re: Reading and wiping notes also adding more notes

[Joel via Digitalmars-d-learn]

On Tuesday, 18 October 2022 at 05:48:27 UTC, Ali Çehreli wrote:
On 10/17/22 22:40, Joel wrote:
> I have two text fields. The one on the left has the whole
text, new
> stuff being added to the bottom. The one on the right has
text I've been
> wiping as I'm reading.

I think this can be modelled as a string array and an index 
showing where the active part starts:

import std;

struct Notes {
    string[] whole;
    size_t activeIndex;

    void add(string line) {
        whole ~= line;
    }

    string[] activeText() {
        return whole[activeIndex..$];
    }

    void wipeText() {
        ++activeIndex;
    }
}

void main() {
    auto input = [ "I went for a walk and fell down a hole.",
                   "There was a D guy on the roof.",
                   "That was a tricky problem!", ];

    Notes notes;

    // add() to add()
    input.each!(line => notes.add(line));

    // activeText() will show the active part
    // wipeText() will move forward
}

Ali

        void upNotes() {
                string left, right;

                left=_editBoxMain.text.to!string;
                right=_editBoxRight.text.to!string;

                // left is the whole doc
                // right is the read and wipe doc

		// Add the new stuff at the bottom of left and append it to the 
right

                size_t chunkSize=100;
                string chunkText, appendText;
                if (right.length<100)
                        chunkSize=right.length;
                
		// mixin(tce("chunkSize left.length right.length 
right[$-chunkSize..$]".split));
                chunkText=left[$-chunkSize..$];

                size_t l=left.length-1, r=right.length-1;
                while(true) {
                        if (right[r..$]!=left[l..$]) {
                                r-=1;
                                l-=1;
                        } else
                                break;
                }
                
                right=right~left[r..$]; //appendText;

                _editBoxRight.text=right.to!dstring;
        }