From e08bac2e10bffc761a70ec6ecaad79db1186bc77 Mon Sep 17 00:00:00 2001
From: Dave Allie <dave@daveallie.com>
Date: Fri, 5 Dec 2025 21:12:15 +1100
Subject: [PATCH] Show indexing text when indexing

---
 lib/EpdFontRenderer/EpdFontRenderer.hpp |  2 +-
 lib/EpdRenderer/EpdRenderer.cpp         |  5 ++---
 src/screens/EpubReaderScreen.cpp        | 14 ++++++++++++++
 3 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/lib/EpdFontRenderer/EpdFontRenderer.hpp b/lib/EpdFontRenderer/EpdFontRenderer.hpp
index b9c3437..647ab7c 100644
--- a/lib/EpdFontRenderer/EpdFontRenderer.hpp
+++ b/lib/EpdFontRenderer/EpdFontRenderer.hpp
@@ -89,7 +89,7 @@ void EpdFontRenderer<Renderable>::renderChar(const uint32_t cp, int* x, const in
   if (font->data->compressed) {
     auto* tmpBitmap = static_cast<uint8_t*>(malloc(bitmapSize));
     if (tmpBitmap == nullptr && bitmapSize) {
-      // ESP_LOGE("font", "malloc failed.");
+      Serial.println("Failed to allocate memory for decompression buffer");
       return;
     }
 
diff --git a/lib/EpdRenderer/EpdRenderer.cpp b/lib/EpdRenderer/EpdRenderer.cpp
index 3180304..455d367 100644
--- a/lib/EpdRenderer/EpdRenderer.cpp
+++ b/lib/EpdRenderer/EpdRenderer.cpp
@@ -120,9 +120,8 @@ void EpdRenderer::clearScreen(const bool black) const {
 
 void EpdRenderer::flushDisplay(const bool partialUpdate) const { display->display(partialUpdate); }
 
-void EpdRenderer::flushArea(int x, int y, int width, int height) const {
-  // TODO: Fix
-  display->display(true);
+void EpdRenderer::flushArea(const int x, const int y, const int width, const int height) const {
+  display->displayWindow(x, y, width, height);
 }
 
 int EpdRenderer::getPageWidth() const { return display->width() - marginLeft - marginRight; }
diff --git a/src/screens/EpubReaderScreen.cpp b/src/screens/EpubReaderScreen.cpp
index d19950d..a75e89d 100644
--- a/src/screens/EpubReaderScreen.cpp
+++ b/src/screens/EpubReaderScreen.cpp
@@ -123,6 +123,20 @@ void EpubReaderScreen::renderPage() {
     section = new Section(epub, currentSpineIndex, renderer);
     if (!section->hasCache()) {
       Serial.println("Cache not found, building...");
+
+      {
+        const int textWidth = renderer->getTextWidth("Indexing...");
+        constexpr int margin = 20;
+        const int x = (renderer->getPageWidth() - textWidth - margin * 2) / 2;
+        constexpr int y = 50;
+        const int w = textWidth + margin * 2;
+        const int h = renderer->getLineHeight() + margin * 2;
+        renderer->fillRect(x, y, w, h, 0);
+        renderer->drawText(x + margin, y + margin, "Indexing...");
+        renderer->drawRect(x + 5, y + 5, w - 10, h - 10, 1);
+        renderer->flushArea(x - 20, y - 20, w + 40, h + 40);
+      }
+
       section->setupCacheDir();
       if (!section->persistPageDataToSD()) {
         Serial.println("Failed to persist page data to SD");