From 6ac071053a9c8c77d796875c0e84871d6e71f75b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ale=C5=A1=20Smodi=C5=A1?= <aless@guru.si>
Date: Thu, 17 Sep 2015 14:44:22 +0200
Subject: Fix handling of "enter" in the console: the current line must be
 processed in its entirety, not split at the cursor.

---
 js/codeq/console.js | 107 +++++++++++++++++++++++++++-------------------------
 1 file changed, 56 insertions(+), 51 deletions(-)

diff --git a/js/codeq/console.js b/js/codeq/console.js
index 9331bc1..d49cd19 100644
--- a/js/codeq/console.js
+++ b/js/codeq/console.js
@@ -418,6 +418,12 @@
                 return result;
             },
 
+            scrollCursorIntoView = function () {
+                var dh = jqContent.height() - jqElt.height();
+                if (dh > 0)
+                    jqElt.scrollTop(dh);
+            },
+
             // the handler object that is returned
             handler = {
                 'setLineBuffered': function () { lineBuffered = true; },
@@ -729,10 +735,8 @@
 
             handleInput = function (chars) {
                 var isPastedFromClipboard = clipboardPasteInProgress || !aKeyIsDown,
-                    newLines = chars.split('\n'),
-                    N = newLines.length,
-                    lastLineIndex = N - 1,
-                    i, promise;
+                    cookedChars = chars, // the default
+                    cookedPromise, cookedLines, lastCookedLineIndex, i;
 
                 if (inputDisabled || internallyDisabled) {
                     // flatly ignore
@@ -741,69 +745,70 @@
                 }
 
                 internallyDisabled = true;
-                promise = Q();
+                cookedPromise = Q();
 
-                for (i = 0; i < N; i++) {
-                    promise = promise
-                        .then((function (newLine, lineIndex) {return function () {
-                            var cookedChars = lineIndex < lastLineIndex ? newLine + '\n' : newLine, // default
-                                thisRow = currentRow,
-                                leftmost = typeof handler.leftmostCol === 'number' && handler.leftmostCol || 0,
-                                dh;
-
-                            // first cook the input
-                            if (typeof handler.onKeypress === 'function') {
-                                // only invoke the handler if the newLine is not an empty string, otherwise cookedChars = ''
-                                try {
-                                    cookedChars = cookedChars && handler.onKeypress(cookedChars, isPastedFromClipboard);
-                                }
-                                catch (e) {
-                                    codeq.log.error('Error during invocation of terminal onKeypress: ' + e, e);
-                                }
-                            }
+                // first cook the input
+                if (typeof handler.onKeypress === 'function') {
+                    // only invoke the handler if the newLine is not an empty string, otherwise cookedChars = ''
+                    try {
+                        cookedChars = cookedChars && handler.onKeypress(cookedChars, isPastedFromClipboard);
+                    }
+                    catch (e) {
+                        codeq.log.error('Error during invocation of terminal onKeypress: ' + e, e);
+                    }
+                }
 
-                            if (!cookedChars) {
-                                // nothing to append
-                                return;
-                            }
+                if (typeof cookedChars !== 'string') cookedLines = [''];
+                else cookedLines = cookedChars.split('\n');
+                lastCookedLineIndex = cookedLines.length - 1;
+
+                // now serve the cooking
+                for (i = 0; i <= lastCookedLineIndex; i++) {
+                    cookedPromise = cookedPromise
+                        .then(scrollCursorIntoView) // scroll to bottom on input
+                        .then((function (cookedLine, cookedLineIndex) {return function () {
+                            var thisRow = currentRow,
+                                leftmost = typeof handler.leftmostCol === 'number' && handler.leftmostCol || 0;
+
+                                if (cookedLine) handler.insertAtCursor(cookedLine, 'input'); // append what we have to the display
+                                if (cookedLineIndex < lastCookedLineIndex) {
+                                    // press on "enter" must be simulated -> jump to the start of the next line, which is first added
+                                    currentRow++;
+                                    currentCol = 0;
+                                    handler.insertRow(currentRow, '', 'input', true);
+                                    handler.reflow(currentRow - 1); // the previous line must be rendered without a cursor, and the new line must be rendered completely
+                                }
 
-                            // now serve the cooking
-                            handler.insertAtCursor(cookedChars, 'input'); // append what we have to the display
-                            // scroll to bottom on input
-                            dh = jqContent.height() - jqElt.height();
-                            if (dh > 0)
-                                jqElt.scrollTop(dh);
-
-                            if (typeof handler.onInput === 'function') { // now tell the owner what we've done
-                                if (lineBuffered) {
-                                    if (thisRow < currentRow) {
-                                        // in line-buffered mode emit each line separately, except for the last (current) line
+                                if (typeof handler.onInput === 'function') { // now tell the owner what we've done
+                                    if (lineBuffered) {
+                                        if (thisRow < currentRow) {
+                                            // in line-buffered mode emit each line separately, except for the last (current) line
+                                            try {
+                                                return handler.onInput(lines[thisRow].content.substring(leftmost));
+                                            }
+                                            catch (e) {
+                                                codeq.log.error('Error while invoking terminal onInput: ' + e, e);
+                                            }
+                                        }
+                                    }
+                                    else if (cookedLine) {
                                         try {
-                                            return handler.onInput(lines[thisRow].content.substring(leftmost));
+                                            return handler.onInput(cookedLine);
                                         }
                                         catch (e) {
                                             codeq.log.error('Error while invoking terminal onInput: ' + e, e);
                                         }
                                     }
                                 }
-                                else if (cookedChars) {
-                                    try {
-                                        return handler.onInput(cookedChars);
-                                    }
-                                    catch (e) {
-                                        codeq.log.error('Error while invoking terminal onInput: ' + e, e);
-                                    }
-                                }
-                            }
-
-                        };})(newLines[i], i))
+                        };})(cookedLines[i], i))
                         .fail(function (e) {
                             codeq.log.error('Error in handleInput loop: ' + e, e);
                         });
                 }
 
-                promise.fin(function () {
+                cookedPromise.fin(function () {
                     internallyDisabled = false;
+                    scrollCursorIntoView();
                 }).done();
 
                 clipboardPasteInProgress = false;
-- 
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