Add scrollback option to config (#3038)

lib/components/term-group.js

@@ -58,6 +58,7 @@ class TermGroup_ extends React.PureComponent {
     const props = getTermProps(uid, this.props, {
       isTermActive: uid === this.props.activeSession,
       term: termRef ? termRef.term : null,
+      scrollback: this.props.scrollback,
       backgroundColor: this.props.backgroundColor,
       foregroundColor: this.props.foregroundColor,
       colors: this.props.colors,

lib/components/term.js

@@ -26,6 +26,7 @@ const getTermOptions = props => {
   const backgroundColor = needTransparency ? 'transparent' : props.backgroundColor;
   return {
     macOptionIsMeta: props.modifierKeys.altIsMeta,
+    scrollback: props.scrollback,
     cursorStyle: CURSOR_STYLES[props.cursorShape],
     cursorBlink: props.cursorBlink,
     fontFamily: props.fontFamily,

lib/components/terms.js

@@ -88,6 +88,7 @@ export default class Terms extends React.Component {
             terms: this.terms,
             activeSession: this.props.activeSession,
             sessions: this.props.sessions,
+            scrollback: this.props.scrollback,
             backgroundColor: this.props.backgroundColor,
             foregroundColor: this.props.foregroundColor,
             borderColor: this.props.borderColor,

lib/containers/terms.js

@@ -17,6 +17,7 @@ const TermsContainer = connect(
       sessions,
       cols: state.ui.cols,
       rows: state.ui.rows,
+      scrollback: state.ui.scrollback,
       termGroups: getRootGroups(state),
       activeRootGroup: state.termGroups.activeRootGroup,
       activeSession: state.sessions.activeUid,

lib/reducers/ui.js

@@ -31,6 +31,7 @@ const allowedWindowControlsValues = new Set([true, false, 'left']);
 const initial = Immutable({
   cols: null,
   rows: null,
+  scrollback: 1000,
   activeUid: null,
   cursorColor: '#F81CE5',
   cursorAccentColor: '#000',
@@ -116,6 +117,10 @@ const reducer = (state = initial, action) => {
           (() => {
             const ret = {};
 
+            if (config.scrollback) {
+              ret.scrollback = config.scrollback;
+            }
+
             if (state.fontSizeOverride && config.fontSize !== state.fontSize) {
               ret.fontSizeOverride = null;
             }