fix: prompt detection on clears (#132)

Signed-off-by: Chapman Pendery <cpendery@vt.edu>

src/isterm/commandManager.ts

@@ -46,6 +46,9 @@ export class CommandManager {
     }
   }
   handlePromptStart() {
+    if (this.#activeCommand.promptStartMarker?.line == -1) {
+      this.#previousCommandLines = new Set();
+    }
     this.#activeCommand = { promptStartMarker: this.#terminal.registerMarker(0), hasOutput: false, cursorTerminated: false };
   }
 

src/ui/ui-root.ts

@@ -36,6 +36,10 @@ export const render = async (shell: Shell) => {
       const newlines = Math.max((data.match(/\r/g) || []).length, (data.match(/\n/g) || []).length);
       const linesOfInterest = MAX_LINES + newlines;
       if (term.getCursorState().remainingLines <= previousSuggestionsRows) {
+        // handles when suggestions get loaded before shell output so you need to always clear below output as a precaution
+        if (term.getCursorState().remainingLines != 0) {
+          writeOutput(ansi.cursorHide + ansi.cursorSavePosition + eraseLinesBelow(linesOfInterest + 1) + ansi.cursorRestorePosition);
+        }
         writeOutput(
           data +
             ansi.cursorHide +