enigma-bbs/core/multi_line_edit_text_view.js

1280 lines
39 KiB
JavaScript

/* jslint node: true */
'use strict';
const View = require('./view.js').View;
const strUtil = require('./string_util.js');
const ansi = require('./ansi_term.js');
const wordWrapText = require('./word_wrap.js').wordWrapText;
const ansiPrep = require('./ansi_prep.js');
const assert = require('assert');
const _ = require('lodash');
// :TODO: Determine CTRL-* keys for various things
// See http://www.bbsdocumentary.com/library/PROGRAMS/GRAPHICS/ANSI/bansi.txt
// http://wiki.synchro.net/howto:editor:slyedit#edit_mode
// http://sublime-text-unofficial-documentation.readthedocs.org/en/latest/reference/keyboard_shortcuts_win.html
/* Mystic
[^B] Reformat Paragraph [^O] Show this help file
[^I] Insert tab space [^Q] Enter quote mode
[^K] Cut current line of text [^V] Toggle insert/overwrite
[^U] Paste previously cut text [^Y] Delete current line
BASIC MOVEMENT COMMANDS
UP/^E LEFT/^S PGUP/^R HOME/^F
DOWN/^X RIGHT/^D PGDN/^C END/^G
*/
//
// Some other interesting implementations, resources, etc.
//
// Editors - BBS
// * https://github.com/M-griffin/Enthral/blob/master/src/msg_fse.cpp
//
//
// Editors - Other
// * http://joe-editor.sourceforge.net/
// * http://www.jbox.dk/downloads/edit.c
// * https://github.com/dominictarr/hipster
//
// Implementations - Word Wrap
// * https://github.com/protomouse/synchronet/blob/93b01c55b3102ebc3c4f4793c3a45b8c13d0dc2a/src/sbbs3/wordwrap.c
//
// Misc notes
// * https://github.com/dominictarr/hipster/issues/15 (Deleting lines/etc.)
//
// Blessed
// insertLine: CSR(top, bottom) + CUP(y, 0) + IL(1) + CSR(0, height)
// deleteLine: CSR(top, bottom) + CUP(y, 0) + DL(1) + CSR(0, height)
// Quick Ansi -- update only what was changed:
// https://github.com/dominictarr/quickansi
//
// To-Do
//
// * Index pos % for emit scroll events
// * Some of this should be async'd where there is lots of processing (e.g. word wrap)
// * Fix backspace when col=0 (e.g. bs to prev line)
// * Add word delete (CTRL+????)
// *
const SPECIAL_KEY_MAP_DEFAULT = {
'line feed': ['return'],
exit: ['esc'],
backspace: ['backspace', 'ctrl + d'], // https://www.tecmint.com/linux-command-line-bash-shortcut-keys/
delete: ['delete'],
tab: ['tab'],
up: ['up arrow'],
down: ['down arrow'],
end: ['end'],
home: ['home'],
left: ['left arrow'],
right: ['right arrow'],
'delete line': ['ctrl + y', 'ctrl + u'], // https://en.wikipedia.org/wiki/Backspace
'page up': ['page up'],
'page down': ['page down'],
insert: ['insert', 'ctrl + v'],
};
exports.MultiLineEditTextView = MultiLineEditTextView;
function MultiLineEditTextView(options) {
if (!_.isBoolean(options.acceptsFocus)) {
options.acceptsFocus = true;
}
if (!_.isBoolean(this.acceptsInput)) {
options.acceptsInput = true;
}
if (!_.isObject(options.specialKeyMap)) {
options.specialKeyMap = SPECIAL_KEY_MAP_DEFAULT;
}
View.call(this, options);
this.initDefaultWidth();
var self = this;
//
// ANSI seems to want tabs to default to 8 characters. See the following:
// * http://www.ansi-bbs.org/ansi-bbs2/control_chars/
// * http://www.bbsdocumentary.com/library/PROGRAMS/GRAPHICS/ANSI/bansi.txt
//
// This seems overkill though, so let's default to 4 :)
// :TODO: what shoudl this really be? Maybe 8 is OK
//
this.tabWidth = _.isNumber(options.tabWidth) ? options.tabWidth : 4;
this.textLines = [];
this.topVisibleIndex = 0;
this.mode = options.mode || 'edit'; // edit | preview | read-only
this.maxLength = 0; // no max by default
if ('preview' === this.mode) {
this.autoScroll = options.autoScroll || true;
this.tabSwitchesView = true;
} else {
this.autoScroll = options.autoScroll || false;
this.tabSwitchesView = options.tabSwitchesView || false;
}
//
// cursorPos represents zero-based row, col positions
// within the editor itself
//
this.cursorPos = { col: 0, row: 0 };
this.isEditMode = function () {
return 'edit' === self.mode;
};
this.isPreviewMode = function () {
return 'preview' === self.mode;
};
this.getTextSgrPrefix = function () {
return self.hasFocus ? self.getFocusSGR() : self.getSGR();
};
// :TODO: Most of the calls to this could be avoided via incrementRow(), decrementRow() that keeps track or such
this.getTextLinesIndex = function (row) {
if (!_.isNumber(row)) {
row = self.cursorPos.row;
}
var index = self.topVisibleIndex + row;
return index;
};
this.getRemainingLinesBelowRow = function (row) {
if (!_.isNumber(row)) {
row = self.cursorPos.row;
}
return self.textLines.length - (self.topVisibleIndex + row) - 1;
};
this.getNextEndOfLineIndex = function (startIndex) {
for (var i = startIndex; i < self.textLines.length; i++) {
if (self.textLines[i].eol) {
return i;
}
}
return self.textLines.length;
};
this.toggleTextCursor = function (action) {
self.client.term.rawWrite(
`${self.getTextSgrPrefix()}${
'hide' === action ? ansi.hideCursor() : ansi.showCursor()
}`
);
};
this.redrawRows = function (startRow, endRow) {
self.toggleTextCursor('hide');
const startIndex = self.getTextLinesIndex(startRow);
const endIndex = Math.min(self.getTextLinesIndex(endRow), self.textLines.length);
const absPos = self.getAbsolutePosition(startRow, 0);
const prefix = self.getTextSgrPrefix();
for (let i = startIndex; i < endIndex; ++i) {
self.client.term.write(
`${ansi.goto(absPos.row++, absPos.col)}${prefix}${self.getRenderText(i)}`,
false // convertLineFeeds
);
}
self.toggleTextCursor('show');
return absPos.row - self.position.row; // row we ended on
};
this.eraseRows = function (startRow, endRow) {
self.toggleTextCursor('hide');
const absPos = self.getAbsolutePosition(startRow, 0);
const absPosEnd = self.getAbsolutePosition(endRow, 0);
const eraseFiller = ' '.repeat(self.dimens.width); //new Array(self.dimens.width).join(' ');
while (absPos.row < absPosEnd.row) {
self.client.term.write(
`${ansi.goto(absPos.row++, absPos.col)}${eraseFiller}`,
false // convertLineFeeds
);
}
self.toggleTextCursor('show');
};
this.redrawVisibleArea = function () {
assert(self.topVisibleIndex <= self.textLines.length);
const lastRow = self.redrawRows(0, self.dimens.height);
self.eraseRows(lastRow, self.dimens.height);
/*
// :TOOD: create eraseRows(startRow, endRow)
if(lastRow < self.dimens.height) {
var absPos = self.getAbsolutePosition(lastRow, 0);
var empty = new Array(self.dimens.width).join(' ');
while(lastRow++ < self.dimens.height) {
self.client.term.write(ansi.goto(absPos.row++, absPos.col));
self.client.term.write(empty);
}
}
*/
};
this.getVisibleText = function (index) {
if (!_.isNumber(index)) {
index = self.getTextLinesIndex();
}
return self.textLines[index].text.replace(/\t/g, ' ');
};
this.getText = function (index) {
if (!_.isNumber(index)) {
index = self.getTextLinesIndex();
}
return self.textLines.length > index ? self.textLines[index].text : '';
};
this.getTextLength = function (index) {
if (!_.isNumber(index)) {
index = self.getTextLinesIndex();
}
return self.textLines.length > index ? self.textLines[index].text.length : 0;
};
this.getCharacter = function (index, col) {
if (!_.isNumber(col)) {
col = self.cursorPos.col;
}
return self.getText(index).charAt(col);
};
this.isTab = function (index, col) {
return '\t' === self.getCharacter(index, col);
};
this.getTextEndOfLineColumn = function (index) {
return Math.max(0, self.getTextLength(index));
};
this.getRenderText = function (index) {
let text = self.getVisibleText(index);
const remain = self.dimens.width - strUtil.renderStringLength(text);
if (remain > 0) {
text += ' '.repeat(remain); // + 1);
}
return text;
};
this.getTextLines = function (startIndex, endIndex) {
var lines;
if (startIndex === endIndex) {
lines = [self.textLines[startIndex]];
} else {
lines = self.textLines.slice(startIndex, endIndex + 1); // "slice extracts up to but not including end."
}
return lines;
};
this.getOutputText = function (startIndex, endIndex, eolMarker, options) {
const lines = self.getTextLines(startIndex, endIndex);
const re = new RegExp('\\t{1,' + self.tabWidth + '}', 'g');
return lines
.map((line, lineIndex) => {
let text = line.text.replace(re, '\t');
if (
options.forceLineTerms ||
(eolMarker && line.eol && lineIndex < lines.length - 1)
) {
text += eolMarker;
}
return text;
})
.join('');
};
this.getContiguousText = function (startIndex, endIndex, includeEol) {
var lines = self.getTextLines(startIndex, endIndex);
var text = '';
for (var i = 0; i < lines.length; ++i) {
text += lines[i].text;
if (includeEol && lines[i].eol) {
text += '\n';
}
}
return text;
};
this.getCharacterLength = function () {
// :TODO: FSE needs re-write anyway, but this should just be known all the time vs calc. Too much of a mess right now...
let len = 0;
this.textLines.forEach(tl => {
len += tl.text.length;
});
return len;
};
this.replaceCharacterInText = function (c, index, col) {
self.textLines[index].text = strUtil.replaceAt(
self.textLines[index].text,
col,
c
);
};
/*
this.editTextAtPosition = function(editAction, text, index, col) {
switch(editAction) {
case 'insert' :
self.insertCharactersInText(text, index, col);
break;
case 'deleteForward' :
break;
case 'deleteBack' :
break;
case 'replace' :
break;
}
};
*/
this.updateTextWordWrap = function (index) {
const nextEolIndex = self.getNextEndOfLineIndex(index);
const wrapped = self.wordWrapSingleLine(
self.getContiguousText(index, nextEolIndex),
'tabsIntact'
);
const newLines = wrapped.wrapped.map(l => {
return { text: l };
});
newLines[newLines.length - 1].eol = true;
Array.prototype.splice.apply(
self.textLines,
[index, nextEolIndex - index + 1].concat(newLines)
);
return wrapped.firstWrapRange;
};
this.removeCharactersFromText = function (index, col, operation, count) {
if ('delete' === operation) {
self.textLines[index].text =
self.textLines[index].text.slice(0, col) +
self.textLines[index].text.slice(col + count);
self.updateTextWordWrap(index);
self.redrawRows(self.cursorPos.row, self.dimens.height);
self.moveClientCursorToCursorPos();
} else if ('backspace' === operation) {
// :TODO: method for splicing text
self.textLines[index].text =
self.textLines[index].text.slice(0, col - (count - 1)) +
self.textLines[index].text.slice(col + 1);
self.cursorPos.col -= count - 1;
self.updateTextWordWrap(index);
self.redrawRows(self.cursorPos.row, self.dimens.height);
self.moveClientCursorToCursorPos();
} else if ('delete line' === operation) {
//
// Delete a visible line. Note that this is *not* the "physical" line, or
// 1:n entries up to eol! This is to keep consistency with home/end, and
// some other text editors such as nano. Sublime for example want to
// treat all of these things using the physical approach, but this seems
// a bit odd in this context.
//
var isLastLine = index === self.textLines.length - 1;
var hadEol = self.textLines[index].eol;
self.textLines.splice(index, 1);
if (hadEol && self.textLines.length > index && !self.textLines[index].eol) {
self.textLines[index].eol = true;
}
//
// Create a empty edit buffer if necessary
// :TODO: Make this a method
if (self.textLines.length < 1) {
self.textLines = [{ text: '', eol: true }];
isLastLine = false; // resetting
}
self.cursorPos.col = 0;
var lastRow = self.redrawRows(self.cursorPos.row, self.dimens.height);
self.eraseRows(lastRow, self.dimens.height);
//
// If we just deleted the last line in the buffer, move up
//
if (isLastLine) {
self.cursorEndOfPreviousLine();
} else {
self.moveClientCursorToCursorPos();
}
}
};
this.insertCharactersInText = function (c, index, col) {
const prevTextLength = self.getTextLength(index);
let editingEol = self.cursorPos.col === prevTextLength;
self.textLines[index].text = [
self.textLines[index].text.slice(0, col),
c,
self.textLines[index].text.slice(col),
].join('');
self.cursorPos.col += c.length;
if (self.getTextLength(index) > self.dimens.width) {
//
// Update word wrapping and |cursorOffset| if the cursor
// was within the bounds of the wrapped text
//
let cursorOffset;
const lastCol = self.cursorPos.col - c.length;
const firstWrapRange = self.updateTextWordWrap(index);
if (lastCol >= firstWrapRange.start && lastCol <= firstWrapRange.end) {
cursorOffset = self.cursorPos.col - firstWrapRange.start;
editingEol = true; //override
} else {
cursorOffset = firstWrapRange.end;
}
// redraw from current row to end of visible area
self.redrawRows(self.cursorPos.row, self.dimens.height);
// If we're editing mid, we're done here. Else, we need to
// move the cursor to the new editing position after a wrap
if (editingEol) {
self.cursorBeginOfNextLine();
self.cursorPos.col += cursorOffset;
self.client.term.rawWrite(ansi.right(cursorOffset));
} else {
// adjust cursor after drawing new rows
const absPos = self.getAbsolutePosition(
self.cursorPos.row,
self.cursorPos.col
);
self.client.term.rawWrite(ansi.goto(absPos.row, absPos.col));
}
} else {
//
// We must only redraw from col -> end of current visible line
//
const absPos = self.getAbsolutePosition(
self.cursorPos.row,
self.cursorPos.col
);
const renderText = self
.getRenderText(index)
.slice(self.cursorPos.col - c.length);
self.client.term.write(
`${ansi.hideCursor()}${self.getTextSgrPrefix()}${renderText}${ansi.goto(
absPos.row,
absPos.col
)}${ansi.showCursor()}`,
false // convertLineFeeds
);
}
};
this.getRemainingTabWidth = function (col) {
if (!_.isNumber(col)) {
col = self.cursorPos.col;
}
return self.tabWidth - (col % self.tabWidth);
};
this.calculateTabStops = function () {
self.tabStops = [0];
var col = 0;
while (col < self.dimens.width) {
col += self.getRemainingTabWidth(col);
self.tabStops.push(col);
}
};
this.getNextTabStop = function (col) {
var i = self.tabStops.length;
while (self.tabStops[--i] > col);
return self.tabStops[++i];
};
this.getPrevTabStop = function (col) {
var i = self.tabStops.length;
while (self.tabStops[--i] >= col);
return self.tabStops[i];
};
this.expandTab = function (col, expandChar) {
expandChar = expandChar || ' ';
return new Array(self.getRemainingTabWidth(col)).join(expandChar);
};
this.wordWrapSingleLine = function (line, tabHandling = 'expand') {
return wordWrapText(line, {
width: self.dimens.width,
tabHandling: tabHandling,
tabWidth: self.tabWidth,
tabChar: '\t',
});
};
this.setTextLines = function (lines, index, termWithEol) {
if (
0 === index &&
(0 === self.textLines.length ||
(self.textLines.length === 1 && '' === self.textLines[0].text))
) {
// quick path: just set the things
self.textLines = lines
.slice(0, -1)
.map(l => {
return { text: l };
})
.concat({ text: lines[lines.length - 1], eol: termWithEol });
} else {
// insert somewhere in textLines...
if (index > self.textLines.length) {
// fill with empty
self.textLines.splice(
self.textLines.length,
0,
...Array.from({ length: index - self.textLines.length }).map(() => {
return { text: '' };
})
);
}
const newLines = lines
.slice(0, -1)
.map(l => {
return { text: l };
})
.concat({ text: lines[lines.length - 1], eol: termWithEol });
self.textLines.splice(index, 0, ...newLines);
}
};
this.setAnsiWithOptions = function (ansi, options, cb) {
function setLines(text) {
text = strUtil.splitTextAtTerms(text);
let index = 0;
text.forEach(line => {
self.setTextLines([line], index, true); // true=termWithEol
index += 1;
});
self.cursorStartOfDocument();
if (cb) {
return cb(null);
}
}
if (options.prepped) {
return setLines(ansi);
}
ansiPrep(
ansi,
{
termWidth: options.termWidth || this.client.term.termWidth,
termHeight: options.termHeight || this.client.term.termHeight,
cols: this.dimens.width,
rows: 'auto',
startCol: this.position.col,
forceLineTerm: options.forceLineTerm,
},
(err, preppedAnsi) => {
return setLines(err ? ansi : preppedAnsi);
}
);
};
this.insertRawText = function (text, index, col) {
//
// Perform the following on |text|:
// * Normalize various line feed formats -> \n
// * Remove some control characters (e.g. \b)
// * Word wrap lines such that they fit in the visible workspace.
// Each actual line will then take 1:n elements in textLines[].
// * Each tab will be appropriately expanded and take 1:n \t
// characters. This allows us to know when we're in tab space
// when doing cursor movement/etc.
//
//
// Try to handle any possible newline that can be fed to us.
// See http://stackoverflow.com/questions/5034781/js-regex-to-split-by-line
//
// :TODO: support index/col insertion point
if (_.isNumber(index)) {
if (_.isNumber(col)) {
//
// Modify text to have information from index
// before and and after column
//
// :TODO: Need to clean this string (e.g. collapse tabs)
text = self.textLines;
// :TODO: Remove original line @ index
}
} else {
index = self.textLines.length;
}
text = strUtil.splitTextAtTerms(text);
let wrapped;
text.forEach(line => {
wrapped = self.wordWrapSingleLine(line, 'expand').wrapped;
self.setTextLines(wrapped, index, true); // true=termWithEol
index += wrapped.length;
});
};
this.getAbsolutePosition = function (row, col) {
return {
row: self.position.row + row,
col: self.position.col + col,
};
};
this.moveClientCursorToCursorPos = function () {
var absPos = self.getAbsolutePosition(self.cursorPos.row, self.cursorPos.col);
self.client.term.rawWrite(ansi.goto(absPos.row, absPos.col));
};
this.keyPressCharacter = function (c) {
if (this.maxLength > 0 && this.getCharacterLength() + 1 >= this.maxLength) {
return;
}
var index = self.getTextLinesIndex();
//
// :TODO: stuff that needs to happen
// * Break up into smaller methods
// * Even in overtype mode, word wrapping must apply if past bounds
// * A lot of this can be used for backspacing also
// * See how Sublime treats tabs in *non* overtype mode... just overwrite them?
//
//
if (self.overtypeMode) {
// :TODO: special handing for insert over eol mark?
self.replaceCharacterInText(c, index, self.cursorPos.col);
self.cursorPos.col++;
self.client.term.write(c);
} else {
self.insertCharactersInText(c, index, self.cursorPos.col);
}
self.emitEditPosition();
};
this.keyPressUp = function () {
if (self.cursorPos.row > 0) {
self.cursorPos.row--;
self.client.term.rawWrite(ansi.up());
if (!self.adjustCursorToNextTab('up')) {
self.adjustCursorIfPastEndOfLine(false);
}
} else {
self.scrollDocumentDown();
self.adjustCursorIfPastEndOfLine(true);
}
self.emitEditPosition();
};
this.keyPressDown = function () {
var lastVisibleRow =
Math.min(self.dimens.height, self.textLines.length - self.topVisibleIndex) -
1;
if (self.cursorPos.row < lastVisibleRow) {
self.cursorPos.row++;
self.client.term.rawWrite(ansi.down());
if (!self.adjustCursorToNextTab('down')) {
self.adjustCursorIfPastEndOfLine(false);
}
} else {
self.scrollDocumentUp();
self.adjustCursorIfPastEndOfLine(true);
}
self.emitEditPosition();
};
this.keyPressLeft = function () {
if (self.cursorPos.col > 0) {
var prevCharIsTab = self.isTab();
self.cursorPos.col--;
self.client.term.rawWrite(ansi.left());
if (prevCharIsTab) {
self.adjustCursorToNextTab('left');
}
} else {
self.cursorEndOfPreviousLine();
}
self.emitEditPosition();
};
this.keyPressRight = function () {
var eolColumn = self.getTextEndOfLineColumn();
if (self.cursorPos.col < eolColumn) {
var prevCharIsTab = self.isTab();
self.cursorPos.col++;
self.client.term.rawWrite(ansi.right());
if (prevCharIsTab) {
self.adjustCursorToNextTab('right');
}
} else {
self.cursorBeginOfNextLine();
}
self.emitEditPosition();
};
this.keyPressHome = function () {
var firstNonWhitespace = self.getVisibleText().search(/\S/);
if (-1 !== firstNonWhitespace) {
self.cursorPos.col = firstNonWhitespace;
} else {
self.cursorPos.col = 0;
}
self.moveClientCursorToCursorPos();
self.emitEditPosition();
};
this.keyPressEnd = function () {
self.cursorPos.col = self.getTextEndOfLineColumn();
self.moveClientCursorToCursorPos();
self.emitEditPosition();
};
this.keyPressPageUp = function () {
if (self.topVisibleIndex > 0) {
self.topVisibleIndex = Math.max(0, self.topVisibleIndex - self.dimens.height);
self.redraw();
self.adjustCursorIfPastEndOfLine(true);
} else {
self.cursorPos.row = 0;
self.moveClientCursorToCursorPos(); // :TODO: ajust if eol, etc.
}
self.emitEditPosition();
};
this.keyPressPageDown = function () {
var linesBelow = self.getRemainingLinesBelowRow();
if (linesBelow > 0) {
self.topVisibleIndex += Math.min(linesBelow, self.dimens.height);
self.redraw();
self.adjustCursorIfPastEndOfLine(true);
}
self.emitEditPosition();
};
this.keyPressLineFeed = function () {
//
// Break up text from cursor position, redraw, and update cursor
// position to start of next line
//
var index = self.getTextLinesIndex();
var nextEolIndex = self.getNextEndOfLineIndex(index);
var text = self.getContiguousText(index, nextEolIndex);
const newLines = self.wordWrapSingleLine(
text.slice(self.cursorPos.col),
'tabsIntact'
).wrapped;
newLines.unshift({ text: text.slice(0, self.cursorPos.col), eol: true });
for (var i = 1; i < newLines.length; ++i) {
newLines[i] = { text: newLines[i] };
}
newLines[newLines.length - 1].eol = true;
Array.prototype.splice.apply(
self.textLines,
[index, nextEolIndex - index + 1].concat(newLines)
);
// redraw from current row to end of visible area
self.redrawRows(self.cursorPos.row, self.dimens.height);
self.cursorBeginOfNextLine();
self.emitEditPosition();
};
this.keyPressInsert = function () {
self.toggleTextEditMode();
};
this.keyPressTab = function () {
var index = self.getTextLinesIndex();
self.insertCharactersInText(
self.expandTab(self.cursorPos.col, '\t') + '\t',
index,
self.cursorPos.col
);
self.emitEditPosition();
};
this.keyPressBackspace = function () {
if (self.cursorPos.col >= 1) {
//
// Don't want to delete character at cursor, but rather the character
// to the left of the cursor!
//
self.cursorPos.col -= 1;
var index = self.getTextLinesIndex();
var count;
if (self.isTab()) {
var col = self.cursorPos.col;
var prevTabStop = self.getPrevTabStop(self.cursorPos.col);
while (col >= prevTabStop) {
if (!self.isTab(index, col)) {
break;
}
--col;
}
count = self.cursorPos.col - col;
} else {
count = 1;
}
self.removeCharactersFromText(index, self.cursorPos.col, 'backspace', count);
} else {
//
// Delete character at end of line previous.
// * This may be a eol marker
// * Word wrapping will need re-applied
//
// :TODO: apply word wrapping such that text can be re-adjusted if it can now fit on prev
self.keyPressLeft(); // same as hitting left - jump to previous line
//self.keyPressBackspace();
}
self.emitEditPosition();
};
this.keyPressDelete = function () {
const lineIndex = self.getTextLinesIndex();
if (
0 === self.cursorPos.col &&
0 === self.textLines[lineIndex].text.length &&
self.textLines.length > 0
) {
//
// Start of line and nothing left. Just delete the line
//
self.removeCharactersFromText(lineIndex, 0, 'delete line');
} else {
self.removeCharactersFromText(lineIndex, self.cursorPos.col, 'delete', 1);
}
self.emitEditPosition();
};
this.keyPressDeleteLine = function () {
if (self.textLines.length > 0) {
self.removeCharactersFromText(self.getTextLinesIndex(), 0, 'delete line');
}
self.emitEditPosition();
};
this.adjustCursorIfPastEndOfLine = function (forceUpdate) {
var eolColumn = self.getTextEndOfLineColumn();
if (self.cursorPos.col > eolColumn) {
self.cursorPos.col = eolColumn;
forceUpdate = true;
}
if (forceUpdate) {
self.moveClientCursorToCursorPos();
}
};
this.adjustCursorToNextTab = function (direction) {
if (self.isTab()) {
var move;
switch (direction) {
//
// Next tabstop to the right
//
case 'right':
move = self.getNextTabStop(self.cursorPos.col) - self.cursorPos.col;
self.cursorPos.col += move;
self.client.term.rawWrite(ansi.right(move));
break;
//
// Next tabstop to the left
//
case 'left':
move = self.cursorPos.col - self.getPrevTabStop(self.cursorPos.col);
self.cursorPos.col -= move;
self.client.term.rawWrite(ansi.left(move));
break;
case 'up':
case 'down':
//
// Jump to the tabstop nearest the cursor
//
var newCol = self.tabStops.reduce(function r(prev, curr) {
return Math.abs(curr - self.cursorPos.col) <
Math.abs(prev - self.cursorPos.col)
? curr
: prev;
});
if (newCol > self.cursorPos.col) {
move = newCol - self.cursorPos.col;
self.cursorPos.col += move;
self.client.term.rawWrite(ansi.right(move));
} else if (newCol < self.cursorPos.col) {
move = self.cursorPos.col - newCol;
self.cursorPos.col -= move;
self.client.term.rawWrite(ansi.left(move));
}
break;
}
return true;
}
return false; // did not fall on a tab
};
this.cursorStartOfDocument = function () {
self.topVisibleIndex = 0;
self.cursorPos = { row: 0, col: 0 };
self.redraw();
self.moveClientCursorToCursorPos();
};
this.cursorEndOfDocument = function () {
self.topVisibleIndex = Math.max(self.textLines.length - self.dimens.height, 0);
self.cursorPos.row = self.textLines.length - self.topVisibleIndex - 1;
self.cursorPos.col = self.getTextEndOfLineColumn();
self.redraw();
self.moveClientCursorToCursorPos();
};
this.cursorBeginOfNextLine = function () {
// e.g. when scrolling right past eol
var linesBelow = self.getRemainingLinesBelowRow();
if (linesBelow > 0) {
var lastVisibleRow = Math.min(self.dimens.height, self.textLines.length) - 1;
if (self.cursorPos.row < lastVisibleRow) {
self.cursorPos.row++;
} else {
self.scrollDocumentUp();
}
self.keyPressHome(); // same as pressing 'home'
}
};
this.cursorEndOfPreviousLine = function () {
// e.g. when scrolling left past start of line
var moveToEnd;
if (self.cursorPos.row > 0) {
self.cursorPos.row--;
moveToEnd = true;
} else if (self.topVisibleIndex > 0) {
self.scrollDocumentDown();
moveToEnd = true;
}
if (moveToEnd) {
self.keyPressEnd(); // same as pressing 'end'
}
};
/*
this.cusorEndOfNextLine = function() {
var linesBelow = self.getRemainingLinesBelowRow();
if(linesBelow > 0) {
var lastVisibleRow = Math.min(self.dimens.height, self.textLines.length) - 1;
if(self.cursorPos.row < lastVisibleRow) {
self.cursorPos.row++;
} else {
self.scrollDocumentUp();
}
self.keyPressEnd(); // same as pressing 'end'
}
};
*/
this.scrollDocumentUp = function () {
//
// Note: We scroll *up* when the cursor goes *down* beyond
// the visible area!
//
var linesBelow = self.getRemainingLinesBelowRow();
if (linesBelow > 0) {
self.topVisibleIndex++;
self.redraw();
}
};
this.scrollDocumentDown = function () {
//
// Note: We scroll *down* when the cursor goes *up* beyond
// the visible area!
//
if (self.topVisibleIndex > 0) {
self.topVisibleIndex--;
self.redraw();
}
};
this.emitEditPosition = function () {
self.emit('edit position', self.getEditPosition());
};
this.toggleTextEditMode = function () {
self.overtypeMode = !self.overtypeMode;
self.emit('text edit mode', self.getTextEditMode());
};
this.insertRawText(''); // init to blank/empty
}
require('util').inherits(MultiLineEditTextView, View);
MultiLineEditTextView.prototype.setWidth = function (width) {
MultiLineEditTextView.super_.prototype.setWidth.call(this, width);
this.calculateTabStops();
};
MultiLineEditTextView.prototype.redraw = function () {
MultiLineEditTextView.super_.prototype.redraw.call(this);
this.redrawVisibleArea();
};
MultiLineEditTextView.prototype.setFocus = function (focused) {
MultiLineEditTextView.super_.prototype.setFocus.call(this, focused);
if (this.isEditMode() && this.getSGR() !== this.getFocusSGR()) {
this.redrawVisibleArea();
} else {
this.client.term.rawWrite(this.getTextSgrPrefix());
}
this.moveClientCursorToCursorPos();
};
MultiLineEditTextView.prototype.setText = function (
text,
options = { scrollMode: 'default' }
) {
this.textLines = [];
this.addText(text, options);
/*this.insertRawText(text);
if(this.isEditMode()) {
this.cursorEndOfDocument();
} else if(this.isPreviewMode()) {
this.cursorStartOfDocument();
}*/
};
MultiLineEditTextView.prototype.setAnsi = function (
ansi,
options = { prepped: false },
cb
) {
this.textLines = [];
return this.setAnsiWithOptions(ansi, options, cb);
};
MultiLineEditTextView.prototype.addText = function (
text,
options = { scrollMode: 'default' }
) {
this.insertRawText(text);
switch (options.scrollMode) {
case 'default':
if (this.isEditMode() || this.autoScroll) {
this.cursorEndOfDocument();
} else {
this.cursorStartOfDocument();
}
break;
case 'top':
case 'start':
this.cursorStartOfDocument();
break;
case 'end':
case 'bottom':
this.cursorEndOfDocument();
break;
}
};
MultiLineEditTextView.prototype.getData = function (options = { forceLineTerms: false }) {
return this.getOutputText(0, this.textLines.length, '\r\n', options);
};
MultiLineEditTextView.prototype.setPropertyValue = function (propName, value) {
switch (propName) {
case 'mode':
this.mode = value;
if ('preview' === value && !this.specialKeyMap.next) {
this.specialKeyMap.next = ['tab'];
}
break;
case 'autoScroll':
this.autoScroll = value;
break;
case 'tabSwitchesView':
this.tabSwitchesView = value;
this.specialKeyMap.next = this.specialKeyMap.next || [];
this.specialKeyMap.next.push('tab');
break;
case 'maxLength':
if (_.isNumber(value)) {
this.maxLength = value;
}
break;
}
MultiLineEditTextView.super_.prototype.setPropertyValue.call(this, propName, value);
};
const HANDLED_SPECIAL_KEYS = [
'up',
'down',
'left',
'right',
'home',
'end',
'page up',
'page down',
'line feed',
'insert',
'tab',
'backspace',
'delete',
'delete line',
];
const PREVIEW_MODE_KEYS = ['up', 'down', 'page up', 'page down'];
MultiLineEditTextView.prototype.onKeyPress = function (ch, key) {
const self = this;
let handled;
if (key) {
HANDLED_SPECIAL_KEYS.forEach(function aKey(specialKey) {
if (self.isKeyMapped(specialKey, key.name)) {
if (
self.isPreviewMode() &&
-1 === PREVIEW_MODE_KEYS.indexOf(specialKey)
) {
return;
}
if ('tab' !== key.name || !self.tabSwitchesView) {
self[_.camelCase('keyPress ' + specialKey)]();
handled = true;
}
}
});
}
if (self.isEditMode() && ch && strUtil.isPrintable(ch)) {
this.keyPressCharacter(ch);
}
if (!handled) {
MultiLineEditTextView.super_.prototype.onKeyPress.call(this, ch, key);
}
};
MultiLineEditTextView.prototype.scrollUp = function () {
this.scrollDocumentUp();
};
MultiLineEditTextView.prototype.scrollDown = function () {
this.scrollDocumentDown();
};
MultiLineEditTextView.prototype.deleteLine = function (line) {
this.textLines.splice(line, 1);
};
MultiLineEditTextView.prototype.getLineCount = function () {
return this.textLines.length;
};
MultiLineEditTextView.prototype.getTextEditMode = function () {
return this.overtypeMode ? 'overtype' : 'insert';
};
MultiLineEditTextView.prototype.getEditPosition = function () {
var currentIndex = this.getTextLinesIndex() + 1;
return {
row: this.getTextLinesIndex(this.cursorPos.row),
col: this.cursorPos.col,
percent: Math.floor((currentIndex / this.textLines.length) * 100),
below: this.getRemainingLinesBelowRow(),
};
};