19004eefaa
Cherry-pick merge from pablohc/crosspoint-reader@2d8cbcf, based on upstream PR #556 by martinbrook with pablohc's refresh optimization. - Add JPEG decoder (picojpeg) and PNG decoder (PNGdec) with 4-level grayscale Bayer dithering for e-ink display - Add pixel caching system (.pxc files) for fast image re-rendering - Integrate image extraction from EPUB HTML parser (<img> tag support) - Add ImageBlock/PageImage types with serialization support - Add image-aware refresh optimization (double FAST_REFRESH technique) - Add experimental displayWindow() partial refresh support - Bump section cache version 12->13 to invalidate stale caches - Resolve TAG_PageImage=3 to avoid conflict with mod's TAG_PageTableRow=2 Co-authored-by: Cursor <cursoragent@cursor.com>
115 lines
4.0 KiB
C++
115 lines
4.0 KiB
C++
#pragma once
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#include <expat.h>
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#include <climits>
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#include <functional>
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#include <memory>
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#include "../ParsedText.h"
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#include "../TableData.h"
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#include "../blocks/ImageBlock.h"
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#include "../blocks/TextBlock.h"
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#include "../css/CssParser.h"
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#include "../css/CssStyle.h"
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class Page;
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class PageTableRow;
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class GfxRenderer;
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class Epub;
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#define MAX_WORD_SIZE 200
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class ChapterHtmlSlimParser {
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std::shared_ptr<Epub> epub;
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const std::string& filepath;
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GfxRenderer& renderer;
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std::function<void(std::unique_ptr<Page>)> completePageFn;
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std::function<void()> popupFn; // Popup callback
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int depth = 0;
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int skipUntilDepth = INT_MAX;
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int boldUntilDepth = INT_MAX;
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int italicUntilDepth = INT_MAX;
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int underlineUntilDepth = INT_MAX;
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// buffer for building up words from characters, will auto break if longer than this
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// leave one char at end for null pointer
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char partWordBuffer[MAX_WORD_SIZE + 1] = {};
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int partWordBufferIndex = 0;
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bool nextWordContinues = false; // true when next flushed word attaches to previous (inline element boundary)
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std::unique_ptr<ParsedText> currentTextBlock = nullptr;
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std::unique_ptr<Page> currentPage = nullptr;
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int16_t currentPageNextY = 0;
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int fontId;
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float lineCompression;
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bool extraParagraphSpacing;
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uint8_t paragraphAlignment;
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uint16_t viewportWidth;
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uint16_t viewportHeight;
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bool hyphenationEnabled;
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const CssParser* cssParser;
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bool embeddedStyle;
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std::string contentBase;
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std::string imageBasePath;
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int imageCounter = 0;
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// Style tracking (replaces depth-based approach)
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struct StyleStackEntry {
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int depth = 0;
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bool hasBold = false, bold = false;
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bool hasItalic = false, italic = false;
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bool hasUnderline = false, underline = false;
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};
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std::vector<StyleStackEntry> inlineStyleStack;
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CssStyle currentCssStyle;
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bool effectiveBold = false;
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bool effectiveItalic = false;
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bool effectiveUnderline = false;
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// Table buffering state
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bool inTable = false;
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std::unique_ptr<TableData> tableData;
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void updateEffectiveInlineStyle();
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void startNewTextBlock(const BlockStyle& blockStyle);
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void flushPartWordBuffer();
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void makePages();
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void processTable();
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void addTableRowToPage(std::shared_ptr<PageTableRow> row);
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// XML callbacks
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static void XMLCALL startElement(void* userData, const XML_Char* name, const XML_Char** atts);
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static void XMLCALL characterData(void* userData, const XML_Char* s, int len);
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static void XMLCALL defaultHandlerExpand(void* userData, const XML_Char* s, int len);
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static void XMLCALL endElement(void* userData, const XML_Char* name);
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public:
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explicit ChapterHtmlSlimParser(std::shared_ptr<Epub> epub, const std::string& filepath, GfxRenderer& renderer,
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const int fontId, const float lineCompression, const bool extraParagraphSpacing,
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const uint8_t paragraphAlignment, const uint16_t viewportWidth,
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const uint16_t viewportHeight, const bool hyphenationEnabled,
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const std::function<void(std::unique_ptr<Page>)>& completePageFn,
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const bool embeddedStyle, const std::string& contentBase,
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const std::string& imageBasePath, const std::function<void()>& popupFn = nullptr,
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const CssParser* cssParser = nullptr)
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: epub(epub),
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filepath(filepath),
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renderer(renderer),
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fontId(fontId),
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lineCompression(lineCompression),
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extraParagraphSpacing(extraParagraphSpacing),
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paragraphAlignment(paragraphAlignment),
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viewportWidth(viewportWidth),
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viewportHeight(viewportHeight),
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hyphenationEnabled(hyphenationEnabled),
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completePageFn(completePageFn),
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popupFn(popupFn),
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cssParser(cssParser),
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embeddedStyle(embeddedStyle),
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contentBase(contentBase),
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imageBasePath(imageBasePath) {}
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~ChapterHtmlSlimParser() = default;
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bool parseAndBuildPages();
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void addLineToPage(std::shared_ptr<TextBlock> line);
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};
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