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103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
#pragma once
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "nvim/decoration_defs.h"
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#include "nvim/map_defs.h"
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enum {
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MT_MAX_DEPTH = 20,
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MT_BRANCH_FACTOR = 10,
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// note max branch is actually 2*MT_BRANCH_FACTOR
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// and strictly this is ceil(log2(2*MT_BRANCH_FACTOR + 1))
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// as we need a pseudo-index for "right before this node"
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MT_LOG2_BRANCH = 5,
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};
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typedef struct {
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int32_t row;
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int32_t col;
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} MTPos;
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#define MTPos(r, c) ((MTPos){ .row = (r), .col = (c) })
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typedef enum {
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kMTMetaInline,
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kMTMetaLines,
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kMTMetaSignHL,
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kMTMetaSignText,
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kMTMetaConcealLines,
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kMTMetaCount, // sentinel, must be last
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} MetaIndex;
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#define kMTFilterSelect ((uint32_t)-1)
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// a filter should be set to kMTFilterSelect for the selected kinds, zero otherwise
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typedef const uint32_t *MetaFilter;
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typedef struct mtnode_s MTNode;
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typedef struct {
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MTPos pos;
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int lvl;
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MTNode *x;
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int i;
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struct {
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int oldcol;
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int i;
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} s[MT_MAX_DEPTH];
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size_t intersect_idx;
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MTPos intersect_pos;
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MTPos intersect_pos_x;
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} MarkTreeIter;
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#define marktree_itr_valid(itr) ((itr)->x != NULL)
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// access raw key: flags in MT_FLAG_EXTERNAL_MASK and decor_data are safe to modify.
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#define mt_itr_rawkey(itr) ((itr)->x->key[(itr)->i])
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// Internal storage
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//
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// NB: actual marks have flags > 0, so we can use (row,col,0) pseudo-key for
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// "space before (row,col)"
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typedef struct {
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MTPos pos;
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uint32_t ns;
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uint32_t id;
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uint16_t flags;
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DecorInlineData decor_data; // "ext" tag in flags
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} MTKey;
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typedef struct {
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MTKey start;
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MTPos end_pos;
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bool end_right_gravity;
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} MTPair;
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typedef kvec_withinit_t(uint64_t, 4) Intersection;
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// part of mtnode_s which is only allocated for inner nodes:
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// pointer to children as well as their meta counts
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struct mtnode_inner_s {
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MTNode *i_ptr[2 * MT_BRANCH_FACTOR];
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uint32_t i_meta[2 * MT_BRANCH_FACTOR][kMTMetaCount];
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};
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struct mtnode_s {
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int32_t n;
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int16_t level;
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int16_t p_idx; // index in parent
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Intersection intersect;
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MTNode *parent;
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MTKey key[2 * MT_BRANCH_FACTOR - 1];
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struct mtnode_inner_s s[];
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};
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typedef struct {
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MTNode *root;
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uint32_t meta_root[kMTMetaCount];
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size_t n_keys, n_nodes;
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PMap(uint64_t) id2node[1];
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} MarkTree;
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