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edit.js: text cursor moves intelligently on navigating lines, but scrolling is still wip

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This commit is contained in:
minjaesong
2021-04-17 10:39:55 +09:00
parent 5554e0e927
commit 7a6b2573ca
1 changed files with 49 additions and 13 deletions
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62
assets/disk0/tvdos/bin/edit.js
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@@ -33,6 +33,7 @@ let cursorCol = 0;
let exit = false;
let scene = -1; // -1: main, 0: filemenu, 1: editmenu , ...
let bulletinShown = false;
let cursoringCol = 0;
// load existing file if it's there
let editingExistingFile = filesystem.open(driveLetter, filePath, "R");
@@ -58,6 +59,7 @@ function reset_status() {
textbuffer = [""];
cursorRow = 0;
cursorCol = 0;
cursoringCol = cursorCol;
}
// DRAWING FUNCTIONS //
@@ -255,6 +257,7 @@ function appendLine() {
// go to the next line
cursorRow += 1;
cursorCol = 0;
cursoringCol = cursorCol;
if (cursorRow >= windowHeight - scrollPeek) {
scroll += 1;
@@ -266,19 +269,33 @@ function appendLine() {
function nextCol() {
if (cursorCol < textbuffer[cursorRow].length) {
cursorCol += 1;
updateScrollState();
cursorCol += 1; cursoringCol = cursorCol; // do NOT inc/dec on cursoringCol
updateScrollState(true, false);
}
}
function prevCol() {
if (cursorCol > 0) {
cursorCol -= 1;
updateScrollState();
cursorCol -= 1; cursoringCol = cursorCol; // do NOT inc/dec on cursoringCol
updateScrollState(true, false);
}
}
function updateScrollState() {
function nextRow() {
if (cursorRow < textbuffer.length) {
cursorRow += 1;
updateScrollState(false, true);
}
}
function prevRow() {
if (cursorRow > 0) {
cursorRow -= 1;
updateScrollState(false, true);
}
}
function updateScrollState(hor, vert) {
gotoText(); // update cursor pos
let cursorPos = con.getyx();
let cx = cursorPos[1]; let cy = cursorPos[0];
@@ -287,17 +304,30 @@ function updateScrollState() {
serial.println(`paintSize: ${paintWidth}x${paintHeight}, cursYX:${cursorPos} cursCol: ${cursorCol} scrH: ${scrollHor}`);
// update horizontal scroll stats
if (cursorCol >= paintWidth - 1 && cx == paintWidth - 1 + PAINT_START_X) {
scrollHor += 1;
drawTextLine(cursorRow - scroll);
}
else if (scrollHor > 0 && cursorCol == scrollHor && cx < PAINT_START_X + 1) {
scrollHor -= 1;
drawTextLine(cursorRow - scroll);
if (hor) {
if (cursorCol >= paintWidth - 1 && cx == paintWidth - 1 + PAINT_START_X) {
scrollHor += 1;
drawTextLine(cursorRow - scroll);
}
else if (scrollHor > 0 && cursorCol == scrollHor && cx < PAINT_START_X + 1) {
scrollHor -= 1;
drawTextLine(cursorRow - scroll);
}
}
// update vertical scroll stats
if (vert) {
cursorCol = Math.min(tlen, cursoringCol); // move the column pointer intelligently, just like any decent text editor would do
if (cursorRow >= paintHeight - 1 && cy == paintHeight - 1 + PAINT_START_Y) {
scrollHor += 1;
drawTextbuffer();
}
else if (scroll > 0 && cursorRow == scroll && cy < PAINT_START_Y + 1) {
scrollHor -= 1;
drawTextbuffer();
}
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////
@@ -335,8 +365,14 @@ while (!exit) {
else if (key == con.KEY_RIGHT && cursorCol < textbuffer[cursorRow].length) {
nextCol(); drawLnCol(); gotoText();
}
else if (key == con.KEY_UP && cursorRow > 0) {
prevRow(); drawLnCol(); gotoText();
}
else if (key == con.KEY_DOWN && cursorRow < textbuffer.length) {
nextRow(); drawLnCol(); gotoText();
}
else if (key == con.KEY_HOME) {
cursorCol = 0; scrollHor = 0;
cursorCol = 0; scrollHor = 0; cursoringCol = cursorCol;
drawTextLine(cursorRow - scroll); drawLnCol(); gotoText();
}
else if (key == con.KEY_END) {