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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141/// A string along with the mapping of each individual byte in the string/// to the point in the screen.const StringMap = @This();
const std = @import("std");const oni = @import("oniguruma");const point = @import("point.zig");const Selection = @import("Selection.zig");const Screen = @import("Screen.zig");const Pin = @import("PageList.zig").Pin;const Allocator = std.mem.Allocator;
string: [:0]const u8,map: []Pin,
pub fn deinit(self: StringMap, alloc: Allocator) void { alloc.free(self.string); alloc.free(self.map);}
/// Returns an iterator that yields the next match of the given regex.pub fn searchIterator( self: StringMap, regex: oni.Regex,) SearchIterator { return .{ .map = self, .regex = regex };}
/// Iterates over the regular expression matches of the string.pub const SearchIterator = struct { map: StringMap, regex: oni.Regex, offset: usize = 0,
/// Returns the next regular expression match or null if there are /// no more matches. pub fn next(self: *SearchIterator) !?Match { if (self.offset >= self.map.string.len) return null;
var region = self.regex.search( self.map.string[self.offset..], .{}, ) catch |err| switch (err) { error.Mismatch => { self.offset = self.map.string.len; return null; },
else => return err, }; errdefer region.deinit();
// Increment our offset by the number of bytes in the match. // We defer this so that we can return the match before // modifying the offset. const end_idx: usize = @intCast(region.ends()[0]); defer self.offset += end_idx;
return .{ .map = self.map, .offset = self.offset, .region = region, }; }};
/// A single regular expression match.pub const Match = struct { map: StringMap, offset: usize, region: oni.Region,
pub fn deinit(self: *Match) void { self.region.deinit(); }
/// Returns the selection containing the full match. pub fn selection(self: Match) Selection { const start_idx: usize = @intCast(self.region.starts()[0]); const end_idx: usize = @intCast(self.region.ends()[0] - 1); const start_pt = self.map.map[self.offset + start_idx]; const end_pt = self.map.map[self.offset + end_idx]; return .init(start_pt, end_pt, false); }};
test "StringMap searchIterator" { const testing = std.testing; const alloc = testing.allocator;
// Initialize our regex try oni.testing.ensureInit(); var re = try oni.Regex.init( "[A-B]{2}", .{}, oni.Encoding.utf8, oni.Syntax.default, null, ); defer re.deinit();
// Initialize our screen var s = try Screen.init(alloc, 5, 5, 0); defer s.deinit(); const str = "1ABCD2EFGH\n3IJKL"; try s.testWriteString(str); const line = s.selectLine(.{ .pin = s.pages.pin(.{ .active = .{ .x = 2, .y = 1, } }).?, }).?; var map: StringMap = undefined; const sel_str = try s.selectionString(alloc, .{ .sel = line, .trim = false, .map = &map, }); alloc.free(sel_str); defer map.deinit(alloc);
// Get our iterator var it = map.searchIterator(re); { var match = (try it.next()).?; defer match.deinit();
const sel = match.selection(); try testing.expectEqual(point.Point{ .screen = .{ .x = 1, .y = 0, } }, s.pages.pointFromPin(.screen, sel.start()).?); try testing.expectEqual(point.Point{ .screen = .{ .x = 2, .y = 0, } }, s.pages.pointFromPin(.screen, sel.end()).?); }
try testing.expect(try it.next() == null);}