Fix assert failures for unhandled atom types in inter-element spacing
Replace fatal asserts with explicit handling for all MTMathAtomType cases in getInterElementSpaceArrayIndexForType(). Previously, unhandled types (accent, number, variable, unaryOperator, underline, overline, boundary, space, style, table) would trigger assert failures and return Int.max, causing array out-of-bounds crashes.
This commit is contained in:
Nicolas Guillot
@@ -244,6 +244,7 @@ public class MTMathUILabel : MTView {
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override public func draw(_ dirtyRect: MTRect) {
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super.draw(dirtyRect)
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if self.mathList == nil { return }
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if self.font == nil { return }
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// drawing code
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let context = MTGraphicsGetCurrentContext()!
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@@ -253,48 +254,64 @@ public class MTMathUILabel : MTView {
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}
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func _layoutSubviews() {
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if _mathList != nil {
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// Use the effective width for layout
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let effectiveWidth = _preferredMaxLayoutWidth > 0 ? _preferredMaxLayoutWidth : bounds.size.width
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let availableWidth = effectiveWidth - contentInsets.left - contentInsets.right
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print("🔧 MTMathUILabel _layoutSubviews:")
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print(" preferredMaxLayoutWidth: \(_preferredMaxLayoutWidth)")
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print(" bounds.size.width: \(bounds.size.width)")
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print(" effectiveWidth: \(effectiveWidth)")
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print(" availableWidth: \(availableWidth)")
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print(" LaTeX: \(_latex.prefix(60))...")
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// print("Pre list = \(_mathList!)")
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_displayList = MTTypesetter.createLineForMathList(_mathList, font: font, style: currentStyle, maxWidth: availableWidth)
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_displayList!.textColor = textColor
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print(" Display subDisplays count: \(_displayList!.subDisplays.count)")
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for (index, subDisplay) in _displayList!.subDisplays.enumerated() {
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print(" Display \(index): type=\(type(of: subDisplay)), x=\(subDisplay.position.x), width=\(subDisplay.width)")
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if let lineDisplay = subDisplay as? MTCTLineDisplay {
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print(" Content: '\(lineDisplay.attributedString?.string ?? "")'")
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}
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}
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// print("Post list = \(_mathList!)")
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var textX = CGFloat(0)
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switch self.textAlignment {
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case .left: textX = contentInsets.left
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case .center: textX = (bounds.size.width - contentInsets.left - contentInsets.right - _displayList!.width) / 2 + contentInsets.left
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case .right: textX = bounds.size.width - _displayList!.width - contentInsets.right
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}
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let availableHeight = bounds.size.height - contentInsets.bottom - contentInsets.top
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// center things vertically
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var height = _displayList!.ascent + _displayList!.descent
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if height < fontSize/2 {
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height = fontSize/2 // set height to half the font size
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}
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let textY = (availableHeight - height) / 2 + _displayList!.descent + contentInsets.bottom
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_displayList!.position = CGPointMake(textX, textY)
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} else {
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guard _mathList != nil && self.font != nil else {
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_displayList = nil
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errorLabel?.frame = self.bounds
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self.setNeedsDisplay()
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return
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}
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// Ensure we have a valid font before attempting to typeset
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if self.font == nil {
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// No valid font - try to get default font
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if let defaultFont = MTFontManager.fontManager.defaultFont {
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self._font = defaultFont
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} else {
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// Cannot typeset without a font, clear display list
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_displayList = nil
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errorLabel?.frame = self.bounds
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self.setNeedsDisplay()
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return
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}
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}
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// Use the effective width for layout
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let effectiveWidth = _preferredMaxLayoutWidth > 0 ? _preferredMaxLayoutWidth : bounds.size.width
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let availableWidth = effectiveWidth - contentInsets.left - contentInsets.right
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print("🔧 MTMathUILabel _layoutSubviews:")
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print(" preferredMaxLayoutWidth: \(_preferredMaxLayoutWidth)")
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print(" bounds.size.width: \(bounds.size.width)")
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print(" effectiveWidth: \(effectiveWidth)")
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print(" availableWidth: \(availableWidth)")
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print(" LaTeX: \(_latex.prefix(60))...")
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// print("Pre list = \(_mathList!)")
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_displayList = MTTypesetter.createLineForMathList(_mathList, font: self.font, style: currentStyle, maxWidth: availableWidth)
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_displayList!.textColor = textColor
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print(" Display subDisplays count: \(_displayList!.subDisplays.count)")
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for (index, subDisplay) in _displayList!.subDisplays.enumerated() {
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print(" Display \(index): type=\(type(of: subDisplay)), x=\(subDisplay.position.x), width=\(subDisplay.width)")
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if let lineDisplay = subDisplay as? MTCTLineDisplay {
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print(" Content: '\(lineDisplay.attributedString?.string ?? "")'")
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}
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}
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// print("Post list = \(_mathList!)")
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var textX = CGFloat(0)
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switch self.textAlignment {
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case .left: textX = contentInsets.left
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case .center: textX = (bounds.size.width - contentInsets.left - contentInsets.right - _displayList!.width) / 2 + contentInsets.left
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case .right: textX = bounds.size.width - _displayList!.width - contentInsets.right
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}
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let availableHeight = bounds.size.height - contentInsets.bottom - contentInsets.top
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// center things vertically
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var height = _displayList!.ascent + _displayList!.descent
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if height < fontSize/2 {
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height = fontSize/2 // set height to half the font size
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}
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let textY = (availableHeight - height) / 2 + _displayList!.descent + contentInsets.bottom
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_displayList!.position = CGPointMake(textX, textY)
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errorLabel?.frame = self.bounds
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self.setNeedsDisplay()
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}
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@@ -305,6 +322,17 @@ public class MTMathUILabel : MTView {
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return CGSize(width: -1, height: -1)
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}
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// Ensure we have a valid font before attempting to typeset
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if self.font == nil {
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// No valid font - try to get default font
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if let defaultFont = MTFontManager.fontManager.defaultFont {
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self._font = defaultFont
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} else {
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// Cannot typeset without a font
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return CGSize(width: -1, height: -1)
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}
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}
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// Determine the maximum width to use
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var maxWidth: CGFloat = 0
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if _preferredMaxLayoutWidth > 0 {
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@@ -314,7 +342,7 @@ public class MTMathUILabel : MTView {
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}
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var displayList:MTMathListDisplay? = nil
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displayList = MTTypesetter.createLineForMathList(_mathList, font: font, style: currentStyle, maxWidth: maxWidth)
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displayList = MTTypesetter.createLineForMathList(_mathList, font: self.font, style: currentStyle, maxWidth: maxWidth)
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guard displayList != nil else {
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// Failed to create display list
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