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input: Trigger.parse
This commit is contained in:
Mitchell Hashimoto
committed by
Mitchell Hashimoto
Mitchell Hashimoto
parent
1fd9cf2d08
commit
63ec5cdd9d
@ -43,85 +43,7 @@ pub fn parse(raw_input: []const u8) !Binding {
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// Determine our trigger conditions by parsing the part before
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// Determine our trigger conditions by parsing the part before
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// the "=", i.e. "ctrl+shift+a" or "a"
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// the "=", i.e. "ctrl+shift+a" or "a"
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const trigger = trigger: {
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const trigger = try Trigger.parse(input[0..eqlIdx]);
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var result: Trigger = .{};
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var iter = std.mem.tokenizeScalar(u8, input[0..eqlIdx], '+');
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loop: while (iter.next()) |part| {
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// All parts must be non-empty
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if (part.len == 0) return Error.InvalidFormat;
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// Check if its a modifier
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const modsInfo = @typeInfo(key.Mods).Struct;
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inline for (modsInfo.fields) |field| {
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if (field.type == bool) {
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if (std.mem.eql(u8, part, field.name)) {
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// Repeat not allowed
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if (@field(result.mods, field.name)) return Error.InvalidFormat;
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@field(result.mods, field.name) = true;
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continue :loop;
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}
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}
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}
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// Alias modifiers
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const alias_mods = .{
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.{ "cmd", "super" }, .{ "command", "super" },
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.{ "opt", "alt" }, .{ "option", "alt" },
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.{ "control", "ctrl" },
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};
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inline for (alias_mods) |pair| {
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if (std.mem.eql(u8, part, pair[0])) {
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// Repeat not allowed
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if (@field(result.mods, pair[1])) return Error.InvalidFormat;
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@field(result.mods, pair[1]) = true;
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continue :loop;
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}
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}
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// If the key starts with "physical" then this is an physical key.
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const physical_prefix = "physical:";
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const physical = std.mem.startsWith(u8, part, physical_prefix);
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const key_part = if (physical) part[physical_prefix.len..] else part;
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// Check if its a key
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const keysInfo = @typeInfo(key.Key).Enum;
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inline for (keysInfo.fields) |field| {
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if (!std.mem.eql(u8, field.name, "invalid")) {
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if (std.mem.eql(u8, key_part, field.name)) {
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// Repeat not allowed
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if (!result.isKeyUnset()) return Error.InvalidFormat;
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const keyval = @field(key.Key, field.name);
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result.key = if (physical)
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.{ .physical = keyval }
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else
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.{ .translated = keyval };
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continue :loop;
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}
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}
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}
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// If we're still unset and we have exactly one unicode
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// character then we can use that as a key.
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if (result.isKeyUnset()) unicode: {
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// Invalid UTF8 drops to invalid format
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const view = std.unicode.Utf8View.init(key_part) catch break :unicode;
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var it = view.iterator();
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// No codepoints or multiple codepoints drops to invalid format
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const cp = it.nextCodepoint() orelse break :unicode;
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if (it.nextCodepoint() != null) break :unicode;
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result.key = .{ .unicode = cp };
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continue :loop;
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}
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// We didn't recognize this value
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return Error.InvalidFormat;
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}
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break :trigger result;
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};
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// Find a matching action
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// Find a matching action
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const action = try Action.parse(input[eqlIdx + 1 ..]);
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const action = try Action.parse(input[eqlIdx + 1 ..]);
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@ -624,6 +546,89 @@ pub const Trigger = struct {
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};
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};
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};
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};
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/// Parse a single trigger. The input is expected to be ONLY the trigger
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/// (i.e. in the sequence `a=ignore` input is only `a`). The trigger may
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/// not be part of a sequence (i.e. `a>b`). This parses exactly a single
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/// trigger.
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pub fn parse(input: []const u8) !Trigger {
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var result: Trigger = .{};
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var iter = std.mem.tokenizeScalar(u8, input, '+');
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loop: while (iter.next()) |part| {
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// All parts must be non-empty
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if (part.len == 0) return Error.InvalidFormat;
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// Check if its a modifier
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const modsInfo = @typeInfo(key.Mods).Struct;
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inline for (modsInfo.fields) |field| {
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if (field.type == bool) {
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if (std.mem.eql(u8, part, field.name)) {
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// Repeat not allowed
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if (@field(result.mods, field.name)) return Error.InvalidFormat;
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@field(result.mods, field.name) = true;
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continue :loop;
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}
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}
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}
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// Alias modifiers
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const alias_mods = .{
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.{ "cmd", "super" }, .{ "command", "super" },
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.{ "opt", "alt" }, .{ "option", "alt" },
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.{ "control", "ctrl" },
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};
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inline for (alias_mods) |pair| {
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if (std.mem.eql(u8, part, pair[0])) {
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// Repeat not allowed
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if (@field(result.mods, pair[1])) return Error.InvalidFormat;
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@field(result.mods, pair[1]) = true;
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continue :loop;
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}
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}
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// If the key starts with "physical" then this is an physical key.
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const physical_prefix = "physical:";
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const physical = std.mem.startsWith(u8, part, physical_prefix);
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const key_part = if (physical) part[physical_prefix.len..] else part;
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// Check if its a key
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const keysInfo = @typeInfo(key.Key).Enum;
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inline for (keysInfo.fields) |field| {
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if (!std.mem.eql(u8, field.name, "invalid")) {
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if (std.mem.eql(u8, key_part, field.name)) {
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// Repeat not allowed
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if (!result.isKeyUnset()) return Error.InvalidFormat;
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const keyval = @field(key.Key, field.name);
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result.key = if (physical)
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.{ .physical = keyval }
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else
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.{ .translated = keyval };
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continue :loop;
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}
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}
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}
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// If we're still unset and we have exactly one unicode
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// character then we can use that as a key.
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if (result.isKeyUnset()) unicode: {
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// Invalid UTF8 drops to invalid format
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const view = std.unicode.Utf8View.init(key_part) catch break :unicode;
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var it = view.iterator();
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// No codepoints or multiple codepoints drops to invalid format
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const cp = it.nextCodepoint() orelse break :unicode;
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if (it.nextCodepoint() != null) break :unicode;
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result.key = .{ .unicode = cp };
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continue :loop;
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}
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// We didn't recognize this value
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return Error.InvalidFormat;
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}
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return result;
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}
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/// Returns true if this trigger has no key set.
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/// Returns true if this trigger has no key set.
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pub fn isKeyUnset(self: Trigger) bool {
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pub fn isKeyUnset(self: Trigger) bool {
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return switch (self.key) {
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return switch (self.key) {
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