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begin adding in support for long lines

page-down-up-bugfix
John McLear 2020-12-29 18:56:04 +00:00
parent 5cd4dc1af2
commit 3eab0df189
1 changed files with 47 additions and 38 deletions
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85
src/static/js/ace2_inner.js
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@ -2806,6 +2806,9 @@ function Ace2Inner() {
} else {
previousCharacterOffset = 0;
}
// previousLine is used in page up/down to ensure that
// a page down event always goes across X characters on that line
const previousLine = rep.selEnd[0]; // TODO: cake jm
inCallStackIfNecessary('handleKeyEvent', function () {
if (type == 'keypress' || (isTypeForSpecialKey && keyCode == 13 /* return*/)) {
@ -3097,44 +3100,35 @@ function Ace2Inner() {
}
if (isPageDown) {
top.console.log('prevcharoffset', previousCharacterOffset);
let line;
// need current character length of line
try {
line = rep.lines.atIndex(rep.selEnd[0]);
} catch (e) {
// silently fail, no big deal..
line = rep.lines.atIndex(visibleLineRange[1]);
}
// Keep the X character offset on page down
if (previousCharacterOffset <= line.width) {
rep.selStart[1] = previousCharacterOffset;
rep.selEnd[1] = previousCharacterOffset;
}
top.console.log('visibleLineRange', visibleLineRange);
rep.selStart[0] = rep.selStart[0] + (visibleLineRange[1] - visibleLineRange[0]);
rep.selEnd[0] = rep.selEnd[0] + (visibleLineRange[1] - visibleLineRange[0]);
// go to the bottom of the last visible content
if (rep.selStart[0] === 0) {
rep.selStart[0] += visibleLineRange[1] - visibleLineRange[0] - 1;
rep.selEnd[0] += visibleLineRange[1] - visibleLineRange[0] - 1;
} else {
top.console.log('am here..', visibleLineRange);
let line;
// need current character length of line
try {
line = rep.lines.atIndex(rep.selEnd[0]);
} catch (e) {
// silently fail, no big deal..
line = rep.lines.atIndex(visibleLineRange[1]);
}
if (rep.selEnd[0] < 0 || rep.selStart[0] < 0) {
top.console.log('trying to visit a negative line?!');
// don't go to negative lines..
rep.selStart[0] = 0;
rep.selEnd[0] = 0;
return;
}
const lineLength = line.width;
// Keep the X character offset on page down
if (previousCharacterOffset <= line.width) {
rep.selStart[1] = previousCharacterOffset;
rep.selEnd[1] = previousCharacterOffset;
}
rep.selStart[0] = rep.selStart[0] + (visibleLineRange[1] - visibleLineRange[0]);
rep.selEnd[0] = rep.selEnd[0] + (visibleLineRange[1] - visibleLineRange[0]);
}
top.console.log(rep.selStart[0]);
if (rep.selStart[0] === -1) {
return rep.selStart[0] = 0;
}
if (rep.selEnd[0] === -1) {
return rep.selEnd[0] = 0;
}
// if the new rep is beyond the viewport
// put the caret on the last line at the end of the line
top.console.log(rep.selStart[0]);
if (rep.selStart[0] >= (linesLength - 1)) {
top.console.log('wait wut?', rep.selStart[0], linesLength - 1);
top.console.log('putting caret on the last line at the end of the line', rep.selStart[0], linesLength - 1);
let line;
// need current character length of line
try {
@ -3143,14 +3137,29 @@ function Ace2Inner() {
// silently fail, no big deal..
line = rep.lines.atIndex(visibleLineRange[1]);
}
const lineLength = line.width;
let lineLength;
// if the last line is a blank line then don't throw an error.
if (line) {
lineLength = line.width;
}else{
lineLength = 0;
}
rep.selStart = [linesLength - 1, lineLength];
rep.selEnd = [linesLength - 1, lineLength];
}
top.console.log('waittt', rep);
// TODO: Handle if character is X offset from content
// lines that are very long might fill the entire page.
// if we can't see the end of the current line (IE see the next line)
// then we need to scroll the X position, not the Y
if (rep.selEnd[0] === visibleLineRange[1]) {
top.console.log('line too long, can\'t see the next line');
// TODO JM CAKE: Figure out how many chars are visible in viewport.
rep.selStart[1] = 50;
rep.selEnd[1] = 50;
}
top.console.log('Final rep: ', rep.selStart);
top.console.log('Final rep: ', rep.selEnd);
}
updateBrowserSelectionFromRep(); // works