Initial marker API implementation

Part of #1325

typings/xterm.d.ts

@@ -235,6 +235,12 @@ declare module 'xterm' {
     dispose(): void;
   }
 
+  export interface IMarker extends IDisposable {
+    readonly id: number;
+    readonly isDisposed: boolean;
+    readonly line: number;
+  }
+
   export interface ILocalizableStrings {
     blankLine: string;
     promptLabel: string;
@@ -265,6 +271,12 @@ declare module 'xterm' {
      */
     cols: number;
 
+    /**
+     * Get all markers registered against the buffer. If the alt buffer is
+     * active this will always return [].
+     */
+    markers: IMarker[];
+
     /**
      * Natural language strings that can be localized.
      */
@@ -403,6 +415,13 @@ declare module 'xterm' {
      */
     deregisterLinkMatcher(matcherId: number): void;
 
+    /**
+     * Adds a marker to the normal buffer and returns it. If the alt buffer is
+     * active, undefined is returned.
+     * @param cursorYOffset The y position offset of the marker from the cursor.
+     */
+    addMarker(cursorYOffset: number): IMarker;
+
     /**
      * Gets whether the terminal has an active selection.
      */
@@ -424,6 +443,13 @@ declare module 'xterm' {
      */
     selectAll(): void;
 
+    /**
+     * Selects text in the buffer between 2 lines.
+     * @param start The 0-based line index to select from (inclusive).
+     * @param end The 0-based line index to select to (inclusive).
+     */
+    selectLines(start: number, end: number): void;
+
     /**
      * Destroys the terminal and detaches it from the DOM.
      */
@@ -451,6 +477,12 @@ declare module 'xterm' {
      */
     scrollToBottom(): void;
 
+    /**
+     * Scrolls to a line within the buffer.
+     * @param line The 0-based line index to scroll to.
+     */
+    scrollToLine(line: number): void;
+
     /**
      * Clear the entire buffer, making the prompt line the new first line.
      */