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fix: Better BiDi logic for formatting

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rtw1x1
2025-12-30 22:20:04 +00:00
parent 18073e7193
commit e7a113885a
4 changed files with 563 additions and 150 deletions
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314
src/EterLib/GrpTextInstance.cpp
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@@ -135,11 +135,37 @@ void CGraphicTextInstance::Update()
// UTF-8 -> UTF-16 conversion - reserve enough space to avoid reallocation
std::vector<wchar_t> wTextBuf((size_t)utf8Len + 1u, 0);
const int wTextLen = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8, utf8Len, wTextBuf.data(), (int)wTextBuf.size());
int wTextLen = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8, utf8Len, wTextBuf.data(), (int)wTextBuf.size());
// If strict UTF-8 conversion fails, try lenient mode (replaces invalid sequences)
if (wTextLen <= 0)
{
ResetState();
return;
DWORD dwError = GetLastError();
BIDI_LOG("GrpTextInstance::Update() - STRICT UTF-8 conversion failed (error %u), trying LENIENT mode", dwError);
BIDI_LOG(" Text length: %d bytes", utf8Len);
BIDI_LOG(" First 32 bytes (hex): %02X %02X %02X %02X %02X %02X %02X %02X...",
(utf8Len > 0 ? (unsigned char)utf8[0] : 0),
(utf8Len > 1 ? (unsigned char)utf8[1] : 0),
(utf8Len > 2 ? (unsigned char)utf8[2] : 0),
(utf8Len > 3 ? (unsigned char)utf8[3] : 0),
(utf8Len > 4 ? (unsigned char)utf8[4] : 0),
(utf8Len > 5 ? (unsigned char)utf8[5] : 0),
(utf8Len > 6 ? (unsigned char)utf8[6] : 0),
(utf8Len > 7 ? (unsigned char)utf8[7] : 0));
BIDI_LOG(" Text preview: %.64s", utf8);
// Try lenient conversion (no MB_ERR_INVALID_CHARS flag)
// This will replace invalid UTF-8 sequences with default character
wTextLen = MultiByteToWideChar(CP_UTF8, 0, utf8, utf8Len, wTextBuf.data(), (int)wTextBuf.size());
if (wTextLen <= 0)
{
BIDI_LOG(" LENIENT conversion also failed! Text cannot be displayed.");
ResetState();
return;
}
BIDI_LOG(" LENIENT conversion succeeded - text will display with replacement characters");
}
@@ -244,38 +270,57 @@ void CGraphicTextInstance::Update()
m_visualToLogicalPos[i] = i;
}
// Check for RTL characters and chat message format in single pass
bool hasRTL = false;
bool isChatMessage = false;
const wchar_t* wTextPtr = wTextBuf.data();
for (int i = 0; i < wTextLen; ++i)
// Use optimized chat message processing if SetChatValue was used
if (m_isChatMessage && !m_chatName.empty() && !m_chatMessage.empty())
{
if (!hasRTL && IsRTLCodepoint(wTextPtr[i]))
hasRTL = true;
// Convert chat name and message to wide chars
std::wstring wName = Utf8ToWide(m_chatName);
std::wstring wMsg = Utf8ToWide(m_chatMessage);
if (!isChatMessage && i < wTextLen - 2 &&
wTextPtr[i] == L' ' && wTextPtr[i + 1] == L':' && wTextPtr[i + 2] == L' ')
isChatMessage = true;
// Use BuildVisualChatMessage for proper BiDi handling
std::vector<wchar_t> visual = BuildVisualChatMessage(
wName.data(), (int)wName.size(),
wMsg.data(), (int)wMsg.size(),
baseRTL);
// Early exit if both found
if (hasRTL && isChatMessage)
break;
}
// Apply BiDi if text contains RTL OR is a chat message in RTL UI
// Skip BiDi for regular input text like :)) in RTL UI
if (hasRTL || (baseRTL && isChatMessage))
{
std::vector<wchar_t> visual = BuildVisualBidiText_Tagless(wTextBuf.data(), wTextLen, baseRTL);
for (size_t i = 0; i < visual.size(); ++i)
__DrawCharacter(pFontTexture, visual[i], defaultColor);
}
else
{
// Pure LTR text or non-chat input - no BiDi processing
// Legacy path: Check for RTL characters and chat message format in single pass
bool hasRTL = false;
bool isChatMessage = false;
const wchar_t* wTextPtr = wTextBuf.data();
for (int i = 0; i < wTextLen; ++i)
__DrawCharacter(pFontTexture, wTextBuf[i], defaultColor);
{
if (!hasRTL && IsRTLCodepoint(wTextPtr[i]))
hasRTL = true;
if (!isChatMessage && i < wTextLen - 2 &&
wTextPtr[i] == L' ' && wTextPtr[i + 1] == L':' && wTextPtr[i + 2] == L' ')
isChatMessage = true;
// Early exit if both found
if (hasRTL && isChatMessage)
break;
}
// Apply BiDi if text contains RTL OR is a chat message in RTL UI
// Skip BiDi for regular input text like :)) in RTL UI
if (hasRTL || (baseRTL && isChatMessage))
{
std::vector<wchar_t> visual = BuildVisualBidiText_Tagless(wTextBuf.data(), wTextLen, baseRTL);
for (size_t i = 0; i < visual.size(); ++i)
__DrawCharacter(pFontTexture, visual[i], defaultColor);
}
else
{
// Pure LTR text or non-chat input - no BiDi processing
for (int i = 0; i < wTextLen; ++i)
__DrawCharacter(pFontTexture, wTextBuf[i], defaultColor);
}
}
}
// ========================================================================
@@ -283,6 +328,37 @@ void CGraphicTextInstance::Update()
// ========================================================================
else
{
// Special handling for chat messages with tags (e.g., hyperlinks)
// We need to process the message separately and then combine with name
std::wstring chatNameWide;
bool isChatWithTags = false;
if (m_isChatMessage && !m_chatName.empty() && !m_chatMessage.empty())
{
isChatWithTags = true;
chatNameWide = Utf8ToWide(m_chatName);
// Process only the message part (not the full text)
const char* msgUtf8 = m_chatMessage.c_str();
const int msgUtf8Len = (int)m_chatMessage.size();
// Re-convert to wide chars for message only
wTextBuf.clear();
wTextBuf.resize((size_t)msgUtf8Len + 1u, 0);
wTextLen = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, msgUtf8, msgUtf8Len, wTextBuf.data(), (int)wTextBuf.size());
if (wTextLen <= 0)
{
// Try lenient conversion
wTextLen = MultiByteToWideChar(CP_UTF8, 0, msgUtf8, msgUtf8Len, wTextBuf.data(), (int)wTextBuf.size());
if (wTextLen <= 0)
{
ResetState();
return;
}
}
}
// Check if text contains RTL characters (cache pointer for performance)
bool hasRTL = false;
const wchar_t* wTextPtr = wTextBuf.data();
@@ -302,7 +378,7 @@ void CGraphicTextInstance::Update()
int logicalPos; // logical index in original wTextBuf (includes tags)
};
auto ReorderTaggedWithBidi = [&](std::vector<TVisChar>& vis, bool forceRTL)
auto ReorderTaggedWithBidi = [&](std::vector<TVisChar>& vis, bool forceRTL, bool isHyperlink, bool shapeOnly = false)
{
if (vis.empty())
return;
@@ -313,7 +389,71 @@ void CGraphicTextInstance::Update()
for (const auto& vc : vis)
buf.push_back(vc.ch);
// Use the exact same BiDi engine as tagless text
// Special handling for hyperlinks: extract content between [ and ], apply BiDi, then re-add brackets
if (isHyperlink && buf.size() > 2)
{
// Find opening and closing brackets
int openIdx = -1, closeIdx = -1;
for (int i = 0; i < (int)buf.size(); ++i)
{
if (buf[i] == L'[' && openIdx < 0) openIdx = i;
if (buf[i] == L']' && closeIdx < 0) closeIdx = i;
}
// If we have valid brackets, process content between them
if (openIdx >= 0 && closeIdx > openIdx)
{
// Extract content (without brackets)
std::vector<wchar_t> content(buf.begin() + openIdx + 1, buf.begin() + closeIdx);
// Apply BiDi to content with LTR base (keeps +9 at end)
std::vector<wchar_t> contentVisual = BuildVisualBidiText_Tagless(content.data(), (int)content.size(), false);
// Rebuild: everything before '[', then '[', then processed content, then ']', then everything after
std::vector<wchar_t> visual;
visual.reserve(buf.size() + contentVisual.size());
// Copy prefix (before '[')
visual.insert(visual.end(), buf.begin(), buf.begin() + openIdx);
// Add opening bracket
visual.push_back(L'[');
// Add processed content
visual.insert(visual.end(), contentVisual.begin(), contentVisual.end());
// Add closing bracket
visual.push_back(L']');
// Copy suffix (after ']')
visual.insert(visual.end(), buf.begin() + closeIdx + 1, buf.end());
// Handle size change due to Arabic shaping
if ((int)visual.size() != (int)vis.size())
{
std::vector<TVisChar> resized;
resized.reserve(visual.size());
for (size_t i = 0; i < visual.size(); ++i)
{
size_t src = (i < vis.size()) ? i : (vis.size() - 1);
TVisChar tmp = vis[src];
tmp.ch = visual[i];
resized.push_back(tmp);
}
vis.swap(resized);
}
else
{
// Same size: write back characters
for (size_t i = 0; i < vis.size(); ++i)
vis[i].ch = visual[i];
}
return;
}
}
// Non-hyperlink or no brackets found: use normal BiDi processing
std::vector<wchar_t> visual = BuildVisualBidiText_Tagless(buf.data(), (int)buf.size(), forceRTL);
// If size differs (rare, but can happen with Arabic shaping expansion),
@@ -434,7 +574,10 @@ void CGraphicTextInstance::Update()
// ====================================================================
// PHASE 2: Apply BiDi to hyperlinks (if RTL text or RTL UI)
// ====================================================================
if (hasRTL || baseRTL)
// DISABLED: Hyperlinks are pre-formatted and stored in visual order
// Applying BiDi to them reverses text that's already correct
// This section is kept for reference but should not execute
if (false)
{
// Collect all hyperlink ranges (reserve typical count)
struct LinkRange { int start; int end; int linkIdx; };
@@ -578,8 +721,13 @@ void CGraphicTextInstance::Update()
}
}
// Apply BiDi to non-hyperlink segments and reorder segments for RTL UI
if (hasRTL || baseRTL)
// Apply BiDi to segments - always process hyperlinks, optionally process other text
// For input fields: only process hyperlinks (preserve cursor for regular text)
// For display text: process everything and reorder segments
const bool hasHyperlinks = !linkTargets.empty();
const bool shouldProcessBidi = (hasRTL || baseRTL) && (!m_isCursor || hasHyperlinks);
if (shouldProcessBidi)
{
// Split text into hyperlink and non-hyperlink segments (reserve typical count)
const size_t estimatedSegments = linkTargets.size() * 2 + 1;
@@ -609,21 +757,32 @@ void CGraphicTextInstance::Update()
}
}
// Apply BiDi to non-hyperlink segments only (cache segment count)
// Apply BiDi to segments
// For input fields: skip non-hyperlink segments to preserve cursor
// For display text: process all segments
const size_t numSegments = segments.size();
for (size_t s = 0; s < numSegments; ++s)
{
if (!isHyperlink[s])
ReorderTaggedWithBidi(segments[s], baseRTL);
// Skip non-hyperlink segments in input fields to preserve cursor
if (m_isCursor && !isHyperlink[s])
continue;
ReorderTaggedWithBidi(segments[s], baseRTL, isHyperlink[s], false);
}
// Rebuild text from segments (reverse order for RTL UI)
// Rebuild text from segments
logicalVis.clear();
logicalVis.reserve(logicalVisSize2); // Reserve original size
if (baseRTL)
// IMPORTANT: Only reverse segments for display text, NOT for input fields
// Input fields need to preserve logical order for proper cursor positioning
// Display text (received chat messages) can reverse for better RTL reading flow
const bool shouldReverseSegments = baseRTL && !m_isCursor;
if (shouldReverseSegments)
{
// RTL UI - reverse segments for right-to-left reading
// RTL display text - reverse segments for right-to-left reading
// Example: "Hello [link]" becomes "[link] Hello" visually
for (int s = (int)numSegments - 1; s >= 0; --s)
{
logicalVis.insert(logicalVis.end(), segments[s].begin(), segments[s].end());
@@ -631,7 +790,8 @@ void CGraphicTextInstance::Update()
}
else
{
// LTR UI - keep original segment order
// LTR UI or input field - keep original segment order
// Input fields must preserve logical order for cursor to work correctly
for (size_t s = 0; s < numSegments; ++s)
{
logicalVis.insert(logicalVis.end(), segments[s].begin(), segments[s].end());
@@ -690,6 +850,18 @@ void CGraphicTextInstance::Update()
curLinkRange.sx = 0;
curLinkRange.ex = 0;
// For LTR chat messages with tags, render name and separator first
if (isChatWithTags && !chatNameWide.empty() && !baseRTL)
{
// LTR UI: "Name : Message"
for (size_t i = 0; i < chatNameWide.size(); ++i)
x += __DrawCharacter(pFontTexture, chatNameWide[i], defaultColor);
x += __DrawCharacter(pFontTexture, L' ', defaultColor);
x += __DrawCharacter(pFontTexture, L':', defaultColor);
x += __DrawCharacter(pFontTexture, L' ', defaultColor);
}
// For RTL, we'll append name AFTER the message (see below)
// Cache size for loop (avoid repeated size() calls)
const size_t logicalVisRenderSize = logicalVis.size();
for (size_t idx = 0; idx < logicalVisRenderSize; ++idx)
@@ -733,6 +905,19 @@ void CGraphicTextInstance::Update()
curLinkRange.text = linkTargets[(size_t)currentLink];
m_hyperlinkVector.push_back(curLinkRange);
}
// Add chat name and separator for RTL messages with tags
if (isChatWithTags && !chatNameWide.empty() && baseRTL)
{
// RTL UI: "Message : Name" (render order matches BuildVisualChatMessage)
// Message was already rendered above, now append separator and name
// When RTL-aligned, this produces visual: [item] on right, name on left
__DrawCharacter(pFontTexture, L' ', defaultColor);
__DrawCharacter(pFontTexture, L':', defaultColor);
__DrawCharacter(pFontTexture, L' ', defaultColor);
for (size_t i = 0; i < chatNameWide.size(); ++i)
__DrawCharacter(pFontTexture, chatNameWide[i], defaultColor);
}
}
pFontTexture->UpdateTexture();
@@ -1090,38 +1275,7 @@ void CGraphicTextInstance::Render(RECT * pClipRect)
continue;
STATEMANAGER.SetTexture(0, pTexture);
// Each character is 4 vertices forming a quad (0=TL, 1=BL, 2=TR, 3=BR)
// We need to convert quads to triangle list format
// Triangle list needs 6 vertices per quad: v0,v1,v2, v2,v1,v3
size_t numQuads = vtxBatch.size() / 4;
std::vector<SVertex> triangleVerts;
triangleVerts.reserve(numQuads * 6);
for (size_t i = 0; i < numQuads; ++i)
{
size_t baseIdx = i * 4;
const SVertex& v0 = vtxBatch[baseIdx + 0]; // TL
const SVertex& v1 = vtxBatch[baseIdx + 1]; // BL
const SVertex& v2 = vtxBatch[baseIdx + 2]; // TR
const SVertex& v3 = vtxBatch[baseIdx + 3]; // BR
// First triangle: TL, BL, TR
triangleVerts.push_back(v0);
triangleVerts.push_back(v1);
triangleVerts.push_back(v2);
// Second triangle: TR, BL, BR
triangleVerts.push_back(v2);
triangleVerts.push_back(v1);
triangleVerts.push_back(v3);
}
if (!triangleVerts.empty())
{
STATEMANAGER.DrawPrimitiveUP(D3DPT_TRIANGLELIST, triangleVerts.size() / 3, triangleVerts.data(), sizeof(SVertex));
}
STATEMANAGER.DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, vtxBatch.size() - 2, vtxBatch.data(), sizeof(SVertex));
}
if (m_isCursor)
@@ -1392,6 +1546,23 @@ void CGraphicTextInstance::SetValue(const char* c_szText, size_t len)
return;
m_stText = c_szText;
m_isChatMessage = false; // Reset chat mode
m_isUpdate = false;
}
void CGraphicTextInstance::SetChatValue(const char* c_szName, const char* c_szMessage)
{
if (!c_szName || !c_szMessage)
return;
// Store separated components
m_chatName = c_szName;
m_chatMessage = c_szMessage;
m_isChatMessage = true;
// Build combined text for rendering (will be processed by Update())
// Use BuildVisualChatMessage in Update() instead of BuildVisualBidiText_Tagless
m_stText = std::string(c_szName) + " : " + std::string(c_szMessage);
m_isUpdate = false;
}
@@ -1525,6 +1696,9 @@ void CGraphicTextInstance::__Initialize()
// Only chat messages should be explicitly set to RTL
m_direction = ETextDirection::Auto;
m_computedRTL = false;
m_isChatMessage = false;
m_chatName = "";
m_chatMessage = "";
m_textWidth = 0;
m_textHeight = 0;