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multigrid: reorganize types and global varaibles

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This commit is contained in:
Björn Linse
2018-12-23 14:35:23 +01:00
parent 820c81e638
commit 1cec5542a8
9 changed files with 82 additions and 70 deletions
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32
src/nvim/globals.h
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@@ -129,38 +129,6 @@ typedef off_t off_T;
# endif
#endif
/// ScreenLines[] contains a copy of the whole screen, as it currently is
/// displayed. It is a single block of screen cells, the size of the screen
/// plus one line. The extra line used as a buffer while redrawing a window
/// line, so it can be compared with the previous state of that line. This way
/// we can avoid sending bigger updates than neccessary to the Ul layer.
///
/// Screen cells are stored as NUL-terminated UTF-8 strings, and a cell can
/// contain up to MAX_MCO composing characters after the base character.
/// The composing characters are to be drawn on top of the original character.
/// The content after the NUL is not defined (so comparison must be done a
/// single cell at a time). Double-width characters are stored in the left cell,
/// and the right cell should only contain the empty string. When a part of the
/// screen is cleared, the cells should be filled with a single whitespace char.
///
/// ScreenAttrs[] contains the highlighting attribute for each cell.
/// LineOffset[n] is the offset from ScreenLines[] and ScreenAttrs[] for the
/// start of line 'n'. These offsets are in general not linear, as full screen
/// scrolling is implemented by rotating the offsets in the LineOffset array.
/// LineWraps[] is an array of boolean flags indicating if the screen line wraps
/// to the next line. It can only be true if a window occupies the entire screen
/// width.
///
/// These, with other related attributes, are stored in a "ScreenGrid"
/// datastructure.
///
/// Note: before the screen is initialized and when out of memory these can be
/// NULL.
EXTERN ScreenGrid default_grid INIT(= { 0, NULL, NULL, NULL, NULL, 0, 0, 0, 0,
0, 0, 0 });
#define DEFAULT_GRID_HANDLE 1 // handle for the default_grid
/*
* When vgetc() is called, it sets mod_mask to the set of modifiers that are
* held down based on the MOD_MASK_* symbols that are read first.