v0.2.0-alpha

Added

• linesInViewport() method - Query which lines are visible in viewport (no side effects), returns ViewportLineInfo with fullyVisible and partiallyVisible ranges
• isLineRendered(n) method - Check if a line is rendered in DOM (no side effects)
• isLineVisible(n, partial?) method - Check if a line is visible in viewport (no side effects)
• documentLineNumber(locator) method - Get 1-based document line number for a line element
• firstVisibleLine() method - Get first actually-visible line (skips anchor lines)
• scrollToLine() position options - Control where line appears: 'top', 'center', 'bottom', or numeric 0-1
• LineRange type - Range of line numbers with first and last properties
• ViewportLineInfo type - Viewport line information with fullyVisible and partiallyVisible arrays
• ScrollLinePosition type - Position option for scrollToLine()
• ScrollToLineOptions type - Options for scrollToLine() including position and waitForIdle

Changed

• Renamed lines to linesInDOM - Clarifies these are DOM elements (may include off-screen anchor lines)
• Renamed materializedLine(n) to lineInDOMAt(n) - Clarifies it's a DOM index, not document line number
• Renamed materializedLineContaining() to lineInDOMContaining() - Consistent naming
• Renamed lineVisible() to scrollToLineAndLocate() - Name reveals side effect (scrolls before returning)
• Renamed scrollLineIntoView() to scrollToLine() - Simpler name
• Renamed toHaveVisibleLineCount() to toHaveDOMLineCount() - Consistent with linesInDOM
• Documentation notes about virtual rendering - linesInDOM may NOT be contiguous (CodeMirror keeps anchor lines like line 1 in DOM with .cm-gap spacers)

Breaking Changes

• lines renamed to linesInDOM
• materializedLine(n) renamed to lineInDOMAt(n) and is now 0-indexed (was 1-indexed)
• materializedLineContaining() renamed to lineInDOMContaining()
• lineVisible() renamed to scrollToLineAndLocate()
• scrollLineIntoView() renamed to scrollToLine()
• toHaveVisibleLineCount() renamed to toHaveDOMLineCount()