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FrayxRulezFrayxRulez
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Add more metrics to text layout
1 parent 17ac521 commit 99acb0d

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‎Telegram.Native/PlaceholderImageHelper.cpp

Lines changed: 110 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1224,6 +1224,116 @@ namespace winrt::Telegram::Native::implementation
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return { metrics.left, metrics.top, metrics.width, metrics.height };
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}
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MaxLinesMetrics PlaceholderImageHelper::MaxLines(hstring text, int32_t offset, int32_t length, IVector<TextEntity> entities, double fontSize, double width, bool rtl, int32_t maxLines)
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{
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std::lock_guard const guard(m_criticalSection);
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HRESULT result;
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//ReturnIfFailed(result, CreateTextFormat(fontSize));
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//ReturnIfFailed(result, m_appleFormat->SetReadingDirection(rtl ? DWRITE_READING_DIRECTION_RIGHT_TO_LEFT : DWRITE_READING_DIRECTION_LEFT_TO_RIGHT));
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winrt::com_ptr<IDWriteTextFormat> textFormat;
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ReturnDefaultIfFailed(result, m_dwriteFactory->CreateTextFormat(
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L"Segoe UI Emoji", // font family name
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m_fontCollection.get(), // system font collection
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DWRITE_FONT_WEIGHT_NORMAL, // font weight
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DWRITE_FONT_STYLE_NORMAL, // font style
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DWRITE_FONT_STRETCH_NORMAL, // default font stretch
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fontSize, // font size
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L"", // locale name
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textFormat.put()
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));
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ReturnDefaultIfFailed(result, textFormat->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_LEADING));
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ReturnDefaultIfFailed(result, textFormat->SetParagraphAlignment(DWRITE_PARAGRAPH_ALIGNMENT_NEAR));
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ReturnDefaultIfFailed(result, textFormat->SetReadingDirection(rtl ? DWRITE_READING_DIRECTION_RIGHT_TO_LEFT : DWRITE_READING_DIRECTION_LEFT_TO_RIGHT));
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winrt::com_ptr<IDWriteTextLayout> textLayout;
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ReturnDefaultIfFailed(result, m_dwriteFactory->CreateTextLayout(
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text.data(), // The string to be laid out and formatted.
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text.size(), // The length of the string.
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textFormat.get(), // The text format to apply to the string (contains font information, etc).
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width, // The width of the layout box.
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INFINITY, // The height of the layout box.
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textLayout.put() // The IDWriteTextLayout interface pointer.
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));
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for (const TextEntity& entity : entities)
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{
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UINT32 startPosition = entity.Offset();
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UINT32 length = entity.Length();
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auto name = winrt::get_class_name(entity.Type());
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if (name == winrt::name_of<TextEntityTypeBold>())
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{
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ReturnDefaultIfFailed(result, textLayout->SetFontWeight(DWRITE_FONT_WEIGHT_SEMI_BOLD, { startPosition, length }));
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}
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else if (name == winrt::name_of<TextEntityTypeItalic>())
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{
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ReturnDefaultIfFailed(result, textLayout->SetFontStyle(DWRITE_FONT_STYLE_ITALIC, { startPosition, length }));
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}
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else if (name == winrt::name_of<TextEntityTypeStrikethrough>())
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{
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ReturnDefaultIfFailed(result, textLayout->SetStrikethrough(TRUE, { startPosition, length }));
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}
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else if (name == winrt::name_of<TextEntityTypeUnderline>())
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{
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ReturnDefaultIfFailed(result, textLayout->SetUnderline(TRUE, { startPosition, length }));
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}
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//else if (name == winrt::name_of<TextEntityTypeCustomEmoji>())
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//{
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// textLayout->SetInlineObject(m_customEmoji.get(), { startPosition, length });
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//}
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else if (name == winrt::name_of<TextEntityTypeCode>() || name == winrt::name_of<TextEntityTypePre>() || name == winrt::name_of<TextEntityTypePreCode>())
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{
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ReturnDefaultIfFailed(result, textLayout->SetFontCollection(m_systemCollection.get(), { startPosition, length }));
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ReturnDefaultIfFailed(result, textLayout->SetFontFamilyName(L"Consolas", { startPosition, length }));
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}
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}
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DWRITE_TEXT_METRICS metrics;
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ReturnDefaultIfFailed(result, textLayout->GetMetrics(&metrics));
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if (maxLines == 0)
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{
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return { metrics.left, metrics.top, metrics.width, metrics.height, metrics.height, length };
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}
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UINT32 actualLineCount;
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DWRITE_LINE_METRICS* ranges = new DWRITE_LINE_METRICS[metrics.lineCount];
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result = textLayout->GetLineMetrics(ranges, metrics.lineCount, &actualLineCount);
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if (result == E_NOT_SUFFICIENT_BUFFER)
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{
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delete[] ranges;
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ranges = new DWRITE_LINE_METRICS[actualLineCount];
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result = textLayout->GetLineMetrics(ranges, actualLineCount, &actualLineCount);
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}
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ReturnDefaultIfFailed(result, result);
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float truncateHeight = 0;
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int32_t truncatePosition = 0;
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// Calculate position where to truncate
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for (UINT32 i = 0; i < maxLines && i < actualLineCount; ++i)
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{
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truncateHeight += ranges[i].height;
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truncatePosition += ranges[i].length;
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}
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// Remove trailing whitespace from last included line
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if (maxLines <= actualLineCount)
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{
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//truncateHeight += ranges[maxLines - 1].height;
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truncatePosition -= ranges[maxLines - 1].trailingWhitespaceLength;
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truncatePosition -= ranges[maxLines - 1].newlineLength;
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}
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delete[] ranges;
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return { metrics.left, metrics.top, metrics.width, metrics.height, truncateHeight, truncatePosition };
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}
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HRESULT PlaceholderImageHelper::WriteBytes(IVector<byte> hash, IRandomAccessStream randomAccessStream) noexcept
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{
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HRESULT result;

‎Telegram.Native/PlaceholderImageHelper.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -135,6 +135,7 @@ namespace winrt::Telegram::Native::implementation
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IVector<Windows::Foundation::Rect> LineMetrics(hstring text, IVector<TextEntity> entities, double fontSize, double width, bool rtl);
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IVector<Windows::Foundation::Rect> RangeMetrics(hstring text, int32_t offset, int32_t length, IVector<TextEntity> entities, double fontSize, double width, bool rtl, bool wrap);
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Windows::Foundation::Rect LayoutMetrics(hstring text, int32_t offset, int32_t length, IVector<TextEntity> entities, double fontSize, double width, bool rtl);
138+
MaxLinesMetrics MaxLines(hstring text, int32_t offset, int32_t length, IVector<TextEntity> entities, double fontSize, double width, bool rtl, int32_t maxLines);
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//IVector<Windows::Foundation::Rect> EntityMetrics(hstring text, IVector<TextEntity> entities, double fontSize, double width, bool rtl);
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private:

‎Telegram.Native/PlaceholderImageHelper.idl

Lines changed: 11 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3,6 +3,16 @@ import "TextFormat.idl";
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namespace Telegram.Native
55
{
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struct MaxLinesMetrics
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{
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Double X;
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Double Y;
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Double Width;
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Double Height;
12+
Double TruncatedHeight;
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Int32 TruncatedOffset;
14+
};
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[default_interface]
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runtimeclass PlaceholderImageHelper
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{
@@ -39,6 +49,7 @@ namespace Telegram.Native
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Windows.Foundation.Collections.IVector<Windows.Foundation.Rect> LineMetrics(String text, Windows.Foundation.Collections.IVector<Telegram.Td.Api.TextEntity> entities, Double fontSize, Double width, Boolean rtl);
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Windows.Foundation.Collections.IVector<Windows.Foundation.Rect> RangeMetrics(String text, Int32 offset, Int32 length, Windows.Foundation.Collections.IVector<Telegram.Td.Api.TextEntity> entities, Double fontSize, Double width, Boolean rtl, Boolean wrap);
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Windows.Foundation.Rect LayoutMetrics(String text, Int32 offset, Int32 length, Windows.Foundation.Collections.IVector<Telegram.Td.Api.TextEntity> entities, Double fontSize, Double width, Boolean rtl);
52+
MaxLinesMetrics MaxLines(String text, Int32 offset, Int32 length, Windows.Foundation.Collections.IVector<Telegram.Td.Api.TextEntity> entities, Double fontSize, Double width, Boolean rtl, Int32 maxLines);
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//Windows.Foundation.Collections.IVector<Windows.Foundation.Rect> EntityMetrics(String text, Windows.Foundation.Collections.IVector<Telegram.Td.Api.TextEntity> entities, Double fontSize, Double width, Boolean rtl);
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}
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} // namespace Telegram.Native

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