diff --git a/gshmm.go b/gshmm.go
index b193b55..facc08e 100644
--- a/gshmm.go
+++ b/gshmm.go
@@ -81,6 +81,9 @@ type model struct {
 	datasheetsLoaded       bool           // Whether or not the datasheets are loaded or not
 	datasheetViewport      viewport.Model // Viewport for the PDF content
 	datasheetViewportStyle lipgloss.Style // Style to show while showing datasheet viewport
+
+	indexSpinner spinner.Model // Spinner to show that content indexes are being loaded
+	querySpinner spinner.Model // Spinner to show that content is being queried
 }
 
 // datasheetFromName retrieves a datasheet via a name.
@@ -209,6 +212,18 @@ func (m model) Init() tea.Cmd {
 	)
 }
 
+// filterDatasheetContents filters datasheet by content from user input.
+func filterDatasheetContents(m model) []string {
+	// TODO: implement indexing work beforehand
+	//       wait for datasheetsLoaded to go true
+	//       then iterate m.datasheets and index them
+	//
+	//       for this function, catch 3 chars or more in the textinput
+	//       start the query, fire the spinner and block any other queries
+	//       coming in. return the list hits that come back from the query
+	return []string{}
+}
+
 // filterDatasheetNames filters datasheet names based on user input.
 func filterDatasheetNames(m model) []string {
 	search := m.input.Value()
@@ -246,7 +261,11 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	cmds = append(cmds, cmd)
 
 	if m.input.Focused() && m.datasheetsLoaded {
-		m.filteredDatasheets = filterDatasheetNames(m)
+		if m.filterMode == filenameFilterMode {
+			m.filteredDatasheets = filterDatasheetNames(m)
+		} else {
+			m.filteredDatasheets = filterDatasheetContents(m)
+		}
 
 		// TODO: implement cursor for scrolling up/down filtered
 		//       results so we can view the PDF contents as desired