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feat: quick rotate option in epub reader menu (#685)

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## Summary

* adds rotation setting in epub reader menu, actual rotation happens on
going back
* improves button hint drawing to draw correctly in all orientations

<img width="860" height="1147" alt="image"
src="https://github.com/user-attachments/assets/91ceeca6-729f-4304-b68a-e412f6e2c9a7"
/>


---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? _**< PARTIALLY  >**_
This commit is contained in:
Arthur Tazhitdinov
2026-02-05 14:53:35 +03:00
committed by GitHub
parent 23ecc52261
commit ee987f07ff
6 changed files with 175 additions and 66 deletions
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59
src/activities/reader/EpubReaderChapterSelectionActivity.cpp
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@@ -2,6 +2,8 @@
#include <GfxRenderer.h>
#include <algorithm>
#include "KOReaderCredentialStore.h"
#include "KOReaderSyncActivity.h"
#include "MappedInputManager.h"
@@ -35,20 +37,18 @@ int EpubReaderChapterSelectionActivity::tocIndexFromItemIndex(int itemIndex) con
int EpubReaderChapterSelectionActivity::getPageItems() const {
// Layout constants used in renderScreen
constexpr int startY = 60;
constexpr int lineHeight = 30;
const int screenHeight = renderer.getScreenHeight();
const int endY = screenHeight - lineHeight;
const int availableHeight = endY - startY;
int items = availableHeight / lineHeight;
// Ensure we always have at least one item per page to avoid division by zero
if (items < 1) {
items = 1;
}
return items;
const auto orientation = renderer.getOrientation();
// In inverted portrait, the button hints are drawn near the logical top.
// Reserve vertical space so list items do not collide with the hints.
const bool isPortraitInverted = orientation == GfxRenderer::Orientation::PortraitInverted;
const int hintGutterHeight = isPortraitInverted ? 50 : 0;
const int startY = 60 + hintGutterHeight;
const int availableHeight = screenHeight - startY - lineHeight;
// Clamp to at least one item to avoid division by zero and empty paging.
return std::max(1, availableHeight / lineHeight);
}
void EpubReaderChapterSelectionActivity::taskTrampoline(void* param) {
@@ -179,39 +179,54 @@ void EpubReaderChapterSelectionActivity::renderScreen() {
renderer.clearScreen();
const auto pageWidth = renderer.getScreenWidth();
const auto orientation = renderer.getOrientation();
// Landscape orientation: reserve a horizontal gutter for button hints.
const bool isLandscapeCw = orientation == GfxRenderer::Orientation::LandscapeClockwise;
const bool isLandscapeCcw = orientation == GfxRenderer::Orientation::LandscapeCounterClockwise;
// Inverted portrait: reserve vertical space for hints at the top.
const bool isPortraitInverted = orientation == GfxRenderer::Orientation::PortraitInverted;
const int hintGutterWidth = (isLandscapeCw || isLandscapeCcw) ? 30 : 0;
// Landscape CW places hints on the left edge; CCW keeps them on the right.
const int contentX = isLandscapeCw ? hintGutterWidth : 0;
const int contentWidth = pageWidth - hintGutterWidth;
const int hintGutterHeight = isPortraitInverted ? 50 : 0;
const int contentY = hintGutterHeight;
const int pageItems = getPageItems();
const int totalItems = getTotalItems();
renderer.drawCenteredText(UI_12_FONT_ID, 15, "Go to Chapter", true, EpdFontFamily::BOLD);
// Manual centering to honor content gutters.
const int titleX =
contentX + (contentWidth - renderer.getTextWidth(UI_12_FONT_ID, "Go to Chapter", EpdFontFamily::BOLD)) / 2;
renderer.drawText(UI_12_FONT_ID, titleX, 15 + contentY, "Go to Chapter", true, EpdFontFamily::BOLD);
const auto pageStartIndex = selectorIndex / pageItems * pageItems;
renderer.fillRect(0, 60 + (selectorIndex % pageItems) * 30 - 2, pageWidth - 1, 30);
// Highlight only the content area, not the hint gutters.
renderer.fillRect(contentX, 60 + contentY + (selectorIndex % pageItems) * 30 - 2, contentWidth - 1, 30);
for (int i = 0; i < pageItems; i++) {
int itemIndex = pageStartIndex + i;
if (itemIndex >= totalItems) break;
const int displayY = 60 + i * 30;
const int displayY = 60 + contentY + i * 30;
const bool isSelected = (itemIndex == selectorIndex);
if (isSyncItem(itemIndex)) {
renderer.drawText(UI_10_FONT_ID, 20, displayY, ">> Sync Progress", !isSelected);
// Sync option uses a fixed label and stays aligned to the content margin.
renderer.drawText(UI_10_FONT_ID, contentX + 20, displayY, ">> Sync Progress", !isSelected);
} else {
const int tocIndex = tocIndexFromItemIndex(itemIndex);
auto item = epub->getTocItem(tocIndex);
const int indentSize = 20 + (item.level - 1) * 15;
// Indent per TOC level while keeping content within the gutter-safe region.
const int indentSize = contentX + 20 + (item.level - 1) * 15;
const std::string chapterName =
renderer.truncatedText(UI_10_FONT_ID, item.title.c_str(), pageWidth - 40 - indentSize);
renderer.truncatedText(UI_10_FONT_ID, item.title.c_str(), contentWidth - 40 - indentSize);
renderer.drawText(UI_10_FONT_ID, indentSize, displayY, chapterName.c_str(), !isSelected);
}
}
// Skip button hints in landscape CW mode (they overlap content)
if (renderer.getOrientation() != GfxRenderer::LandscapeClockwise) {
const auto labels = mappedInput.mapLabels("« Back", "Select", "Up", "Down");
GUI.drawButtonHints(renderer, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
}
const auto labels = mappedInput.mapLabels("« Back", "Select", "Up", "Down");
GUI.drawButtonHints(renderer, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
renderer.displayBuffer();
}