diff --git a/gshmm.go b/gshmm.go
index ec4e52f..6c33583 100644
--- a/gshmm.go
+++ b/gshmm.go
@@ -138,7 +138,9 @@ func initialModel() model {
 		return nil
 	})
 
-	// TODO: set width/heigh to match terminal
+	// TODO: set width/heigh to match terminal. this should also
+	//       be set in relation to the list of filenames also. they
+	//       should have some visually pleasing ratio set i imagine
 	viewp := viewport.New(60, 30)
 	selectedDatasheet := datasheets[len(datasheets)-1].contents
 	viewp.SetContent(selectedDatasheet)
@@ -160,6 +162,26 @@ func (m model) Init() tea.Cmd {
 	return textinput.Blink
 }
 
+// filterDatasheetNames filters datasheet names based on user input.
+func filterDatasheetNames(m model) []string {
+	search := m.input.Value()
+	if !(len(search) >= minCharsUntilFilter) {
+		return m.datasheetNames
+	}
+
+	var matchedDatasheets []string
+	matches := fuzzy.Find(search, m.datasheetNames)
+	for _, match := range matches {
+		matchedDatasheets = append(matchedDatasheets, match.Str)
+	}
+
+	if len(matches) > 0 {
+		return matchedDatasheets
+	}
+
+	return m.datasheetNames
+}
+
 // Update updates the program state.
 func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	var (
@@ -168,23 +190,7 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	)
 
 	if m.input.Focused() {
-		var matchedDatasheets []string
-
-		search := m.input.Value()
-		if len(search) >= minCharsUntilFilter {
-			matches := fuzzy.Find(search, m.datasheetNames)
-			for _, match := range matches {
-				matchedDatasheets = append(matchedDatasheets, match.Str)
-			}
-
-			if len(matches) > 0 {
-				m.filteredDatasheets = matchedDatasheets
-			} else {
-				m.filteredDatasheets = m.datasheetNames
-			}
-		} else {
-			m.filteredDatasheets = m.datasheetNames
-		}
+		m.filteredDatasheets = filterDatasheetNames(m)
 
 		// TODO: implement cursor for scrolling up/down filtered
 		//       results so we can view the PDF contents as desired