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working going to end of the line and beginning of first

pull/4624/head
John McLear 2020-12-28 14:12:24 +00:00
parent 92450e071d
commit 0b9962c6c6
2 changed files with 25 additions and 14 deletions
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36
src/static/js/ace2_inner.js
View File

@ -1,3 +1,4 @@
'use strict';
/**
* This code is mostly from the old Etherpad. Please help us to comment this code.
* This helps other people to understand this code better and helps them to improve it.
@ -3059,32 +3060,41 @@ function Ace2Inner() {
const linesLength = rep.lines.length();
if (isPageUp) {
top.console.log('page up');
// go to the top of the visible content
rep.selStart[0] -= visibleLineRange[1] - visibleLineRange[0] + 1;
rep.selEnd[0] -= visibleLineRange[1] - visibleLineRange[0] + 1;
// if the new rep is beyond the viewport, put the caret on the last line
if (rep.selStart[0] < 0) {
rep.selStart[0] -= visibleLineRange[1] - visibleLineRange[0];
rep.selEnd[0] -= visibleLineRange[1] - visibleLineRange[0];
// if the new rep is beyond the viewport or first line,
if (rep.selStart[0] <= 0) {
// put the caret on the first line in the first position
rep.selStart = [0, 0];
rep.selEnd = [0, 0];
}
}
if (isPageDown) {
top.console.log('pag edown');
// 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 {
rep.selStart[0] += visibleLineRange[1] - visibleLineRange[0];
rep.selEnd[0] += visibleLineRange[1] - visibleLineRange[0];
rep.selStart[0] = visibleLineRange[1] - visibleLineRange[0];
rep.selEnd[0] = visibleLineRange[1] - visibleLineRange[0];
}
// if the new rep is beyond the viewport, put the caret on the last line
if (rep.selStart[0] > linesLength) {
top.console.log('beyond scope');
rep.selStart = [linesLength - 1, 0];
rep.selEnd = [linesLength - 1, 0];
if (rep.selStart[0] === -1) rep.selStart[0] = 0;
if (rep.selEnd[0] === -1) 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
if (rep.selStart[0] >= (linesLength - 1)) {
// need current character length of line
const line = rep.lines.atIndex(rep.selEnd[0]);
let lineLength;
if (line) { // need to test if this is needed or not.
lineLength = line.width;
} else {
lineLength = 0;
}
rep.selStart = [linesLength - 1, lineLength];
rep.selEnd = [linesLength - 1, lineLength];
}
// TODO: Handle if character is X offset from content
}

3
src/static/js/scroll.js
View File

@ -365,7 +365,8 @@ Scroll.prototype.getVisibleLineRange = function (rep) {
Scroll.prototype.getVisibleCharRange = function (rep) {
const lineRange = this.getVisibleLineRange(rep);
// top.console.log(rep.lines);
// top.console.log('char range', 0, rep.lines.offsetOfIndex(lineRange[0]));
// top.console.log('char range', 1, rep.lines.offsetOfIndex(lineRange[1]));
return [rep.lines.offsetOfIndex(lineRange[0]), rep.lines.offsetOfIndex(lineRange[1])];
};