392 lines
14 KiB
Plaintext
392 lines
14 KiB
Plaintext
import "raylib";
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import "std_types";
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import "libc";
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MainCursor: Selection;
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MouseScrolling: bool;
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Selection :: struct {
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a: int;
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b: int;
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}
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GetRange :: proc(s: Selection): Range {
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result: Range = {MinInt(s.a, s.b), MaxInt(s.a, s.b)};
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return result;
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}
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main :: proc(): int {
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InitWindow(800, 600, "TextEditor");
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SetTargetFPS(60);
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font_size: float = 14;
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font_spacing: float = 1;
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font: Font = LoadFontEx("C:/Windows/Fonts/consola.ttf", :int(font_size), nil, 0);
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glyph_info: GlyphInfo = GetGlyphInfo(font, 'A');
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size := MeasureTextEx(font, "A", font_size, font_spacing);
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Monosize = {:float(glyph_info.image.width), size.y};
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buffer: Buffer;
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file_content := LoadFileText("C:/Work/language/examples/text_editor/main.lc");
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AddText(&buffer, {file_content, :int(strlen(file_content))});
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UnloadFileText(file_content);
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for !WindowShouldClose() {
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initial_cursor: Selection = MainCursor;
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screen_size: Vector2 = {:f32(GetScreenWidth()), :f32(GetScreenHeight())};
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screen_rect := Rect2PSize(0, 0, screen_size.x, screen_size.y);
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bar := CutRight(&screen_rect, 10);
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if IsKeyPressed(KEY_LEFT) || IsKeyPressedRepeat(KEY_LEFT) {
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if IsKeyDown(KEY_LEFT_SHIFT) {
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if IsKeyDown(KEY_LEFT_CONTROL) {
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MainCursor.b = SeekOnWordBoundary(&buffer, MainCursor.b, GO_BACKWARD);
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} else {
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MainCursor.b = MoveLeft(&buffer, MainCursor.b);
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}
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} else {
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if IsKeyDown(KEY_LEFT_CONTROL) {
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MainCursor.a = SeekOnWordBoundary(&buffer, MainCursor.a, GO_BACKWARD);
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MainCursor.b = MainCursor.a;
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} else {
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range := GetRange(MainCursor);
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if GetRangeSize(range) > 0 {
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MainCursor.a = MinInt(MainCursor.a, MainCursor.b);
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MainCursor.b = MinInt(MainCursor.a, MainCursor.b);
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} else {
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MainCursor.a = MoveLeft(&buffer, MainCursor.a);
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MainCursor.b = MainCursor.a;
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}
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}
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}
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}
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if IsKeyPressed(KEY_RIGHT) || IsKeyPressedRepeat(KEY_RIGHT) {
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if IsKeyDown(KEY_LEFT_SHIFT) {
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if IsKeyDown(KEY_LEFT_CONTROL) {
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MainCursor.b = SeekOnWordBoundary(&buffer, MainCursor.b, GO_FORWARD);
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} else {
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MainCursor.b = MoveRight(&buffer, MainCursor.b);
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}
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} else {
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if IsKeyDown(KEY_LEFT_CONTROL) {
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MainCursor.a = SeekOnWordBoundary(&buffer, MainCursor.a, GO_FORWARD);
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MainCursor.b = MainCursor.a;
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} else {
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range := GetRange(MainCursor);
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if GetRangeSize(range) > 0 {
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MainCursor.a = MaxInt(MainCursor.a, MainCursor.b);
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MainCursor.b = MaxInt(MainCursor.a, MainCursor.b);
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} else {
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MainCursor.a = MoveRight(&buffer, MainCursor.a);
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MainCursor.b = MainCursor.a;
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}
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}
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}
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}
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if (IsKeyPressed(KEY_DOWN) || IsKeyPressedRepeat(KEY_DOWN)) {
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if IsKeyDown(KEY_LEFT_SHIFT) {
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MainCursor.b = MoveDown(&buffer, MainCursor.b);
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} else {
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range := GetRange(MainCursor);
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if GetRangeSize(range) > 0 {
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MainCursor.b = range.max;
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MainCursor.a = range.max;
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}
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MainCursor.a = MoveDown(&buffer, MainCursor.a);
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MainCursor.b = MainCursor.a;
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}
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}
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if (IsKeyPressed(KEY_UP) || IsKeyPressedRepeat(KEY_UP)) {
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if IsKeyDown(KEY_LEFT_SHIFT) {
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MainCursor.b = MoveUp(&buffer, MainCursor.b);
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} else {
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range := GetRange(MainCursor);
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if GetRangeSize(range) > 0 {
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MainCursor.b = range.min;
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MainCursor.a = range.min;
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}
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MainCursor.a = MoveUp(&buffer, MainCursor.a);
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MainCursor.b = MainCursor.a;
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}
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}
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if IsKeyPressed(KEY_BACKSPACE) || IsKeyPressedRepeat(KEY_BACKSPACE) {
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range := GetRange(MainCursor);
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range_size := GetRangeSize(range);
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if range_size == 0 {
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if IsKeyDown(KEY_LEFT_CONTROL) {
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left := SeekOnWordBoundary(&buffer, MainCursor.a, GO_BACKWARD);
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ReplaceText(&buffer, {left, MainCursor.a}, "");
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MainCursor.a = left;
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MainCursor.b = MainCursor.a;
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} else {
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left := MoveLeft(&buffer, MainCursor.a);
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ReplaceText(&buffer, {left, MainCursor.a}, "");
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MainCursor.a = left;
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MainCursor.b = MainCursor.a;
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}
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} else {
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ReplaceText(&buffer, range, "");
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MainCursor.b = range.min;
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MainCursor.a = MainCursor.b;
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}
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}
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if IsKeyPressed(KEY_DELETE) || IsKeyPressedRepeat(KEY_DELETE) {
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range := GetRange(MainCursor);
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range_size := GetRangeSize(range);
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if range_size == 0 {
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if IsKeyDown(KEY_LEFT_CONTROL) {
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right := SeekOnWordBoundary(&buffer, MainCursor.a);
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ReplaceText(&buffer, {MainCursor.a, right}, "");
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} else {
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right := MoveRight(&buffer, MainCursor.a);
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ReplaceText(&buffer, {MainCursor.a, right}, "");
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}
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MainCursor.b = MainCursor.a;
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} else {
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ReplaceText(&buffer, range, "");
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MainCursor.b = range.min;
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MainCursor.a = MainCursor.b;
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}
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}
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if IsKeyPressed(KEY_ENTER) || IsKeyPressedRepeat(KEY_ENTER) {
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ReplaceText(&buffer, GetRange(MainCursor), "\n");
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MainCursor.a = MoveRight(&buffer, MainCursor.a);
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MainCursor.b = MainCursor.a;
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}
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if IsKeyPressed(KEY_TAB) || IsKeyPressedRepeat(KEY_TAB) {
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selection_range := GetRange(MainCursor);
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ReplaceText(&buffer, selection_range, " ");
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range_size := GetRangeSize(selection_range);
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if range_size != 0 {
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MainCursor.a = selection_range.min;
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MainCursor.b = selection_range.min;
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}
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MainCursor.a = MoveRight(&buffer, MainCursor.a + 3);
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MainCursor.b = MainCursor.a;
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}
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if IsKeyPressed(KEY_HOME) {
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line := FindLineOfPos(&buffer, MainCursor.b);
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if IsKeyDown(KEY_LEFT_SHIFT) {
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MainCursor.b = line.range.min;
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} else {
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MainCursor.a = line.range.min;
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MainCursor.b = line.range.min;
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}
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}
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if IsKeyPressed(KEY_END) {
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line := FindLineOfPos(&buffer, MainCursor.b);
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if IsKeyDown(KEY_LEFT_SHIFT) {
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MainCursor.b = line.range.max;
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} else {
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MainCursor.a = line.range.max;
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MainCursor.b = line.range.max;
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}
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}
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if IsKeyPressed(KEY_PAGE_DOWN) || IsKeyPressedRepeat(KEY_PAGE_DOWN) {
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vpos := CalculateVisualPos(&buffer, MainCursor.b);
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move_by := :int(roundf(GetRectY(screen_rect) / Monosize.y));
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vpos.y += move_by;
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MainCursor.b = CalculatePosFromVisualPos(&buffer, vpos);
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if !IsKeyDown(KEY_LEFT_SHIFT) {
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MainCursor.a = MainCursor.b;
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}
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}
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if IsKeyPressed(KEY_PAGE_UP) || IsKeyPressedRepeat(KEY_PAGE_UP) {
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vpos := CalculateVisualPos(&buffer, MainCursor.b);
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move_by := :int(roundf(GetRectY(screen_rect) / Monosize.y));
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vpos.y -= move_by;
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MainCursor.b = CalculatePosFromVisualPos(&buffer, vpos);
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if !IsKeyDown(KEY_LEFT_SHIFT) {
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MainCursor.a = MainCursor.b;
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}
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}
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buffer_end_vpos := CalculateVisualPos(&buffer, buffer.len - 1);
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buffer_end_wpos := CalculateWorldPosUnscrolled(buffer_end_vpos);
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mouse_p := GetMousePosition();
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if CheckCollisionPointRec(mouse_p, Rect2PToRectangle(screen_rect)) && !MouseScrolling {
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if IsMouseButtonPressed(MOUSE_BUTTON_LEFT) {
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p := Vector2Add(mouse_p, Scroll);
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p = Vector2Divide(p, Monosize);
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x := :int(floorf(p.x));
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y := :int(floorf(p.y));
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MainCursor.a = CalculatePosFromVisualPos(&buffer, {x, y});
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MainCursor.b = MainCursor.a;
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} else if IsMouseButtonDown(MOUSE_BUTTON_LEFT) {
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p := Vector2Add(mouse_p, Scroll);
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p = Vector2Divide(p, Monosize);
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x := :int(floorf(p.x));
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y := :int(floorf(p.y));
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MainCursor.b = CalculatePosFromVisualPos(&buffer, {x, y});
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}
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SetMouseCursor(MOUSE_CURSOR_IBEAM);
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} else {
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SetMouseCursor(MOUSE_CURSOR_DEFAULT);
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if IsMouseButtonPressed(MOUSE_BUTTON_LEFT) {
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MouseScrolling = true;
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}
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}
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if MouseScrolling {
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mouse_scroll_marker_normalized := mouse_p.y / GetRectY(screen_rect);
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Scroll.y = mouse_scroll_marker_normalized * buffer_end_wpos.y;
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if IsMouseButtonReleased(MOUSE_BUTTON_LEFT) MouseScrolling = false;
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}
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for key := GetCharPressed(); key; key = GetCharPressed() {
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selection_range := GetRange(MainCursor);
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result: UTF8_Result = UTF32ToUTF8(:u32(key));
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if result.error == 0 {
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ReplaceText(&buffer, selection_range, {:*char(&result.out_str[0]), result.len});
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} else {
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ReplaceText(&buffer, selection_range, "?");
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}
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range_size := GetRangeSize(selection_range);
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if range_size != 0 {
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MainCursor.a = selection_range.min;
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MainCursor.b = selection_range.min;
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}
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MainCursor.a = MoveRight(&buffer, MainCursor.a);
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MainCursor.b = MainCursor.a;
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}
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//
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// Scrolling
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//
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mouse_wheel := GetMouseWheelMove() * 48;
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Scroll.y -= mouse_wheel;
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if initial_cursor.b != MainCursor.b {
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cursor_vpos := CalculateVisualPos(&buffer, MainCursor.b);
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world_pos := CalculateWorldPosUnscrolled(cursor_vpos);
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world_pos_cursor_end := Vector2Add(world_pos, Monosize);
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scrolled_begin := Scroll;
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scrolled_end := Vector2Add(Scroll, GetRectSize(screen_rect));
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if world_pos_cursor_end.x > scrolled_end.x {
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Scroll.x += world_pos_cursor_end.x - scrolled_end.x;
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}
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if world_pos.x < scrolled_begin.x {
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Scroll.x -= scrolled_begin.x - world_pos.x;
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}
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if world_pos_cursor_end.y > scrolled_end.y {
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Scroll.y += world_pos_cursor_end.y - scrolled_end.y;
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}
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if world_pos.y < scrolled_begin.y {
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Scroll.y -= scrolled_begin.y - world_pos.y;
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}
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}
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if (Scroll.x < 0) Scroll.x = 0;
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if (Scroll.y < 0) Scroll.y = 0;
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if (Scroll.y > buffer_end_wpos.y) Scroll.y = buffer_end_wpos.y;
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BeginDrawing();
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ClearBackground(RAYWHITE);
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buffer_pixel_size := GetRectSize(screen_rect);
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_miny := Scroll.y / Monosize.y;
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_maxy := (Scroll.y + buffer_pixel_size.y) / Monosize.y;
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_minx := Scroll.x / Monosize.x;
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_maxx := (Scroll.x + buffer_pixel_size.x) / Monosize.x;
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miny := :int(floorf(_miny));
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minx := :int(floorf(_minx));
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maxy := :int(ceilf(_maxy));
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maxx := :int(ceilf(_maxx));
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// Draw grid
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if 0 {
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for y := miny; y < maxy; y += 1 {
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for x := minx; x < maxx; x += 1 {
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p := CalculateWorldPos({x, y});
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rect := Rect2PSize(p.x, p.y, Monosize.x, Monosize.y);
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rect = Shrink(rect, 1);
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DrawRect(rect, {255, 0, 0, 40});
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}
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}
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}
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// Draw text
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{
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miny = ClampInt(miny, 0, buffer.lines.len - 1);
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maxy = ClampInt(maxy, 0, buffer.lines.len - 1);
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for y := miny; y <= maxy; y += 1 {
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line := buffer.lines.data[y];
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string := AllocStringFromBuffer(&buffer, line, null_terminate = true);
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defer free(string.str);
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pos := CalculateWorldPos({0, y});
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DrawTextEx(font, string.str, pos, font_size, font_spacing, BLACK);
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}
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}
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// Draw selection
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{
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range := GetRange(MainCursor);
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start_vpos := CalculateVisualPos(&buffer, range.min);
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pos := start_vpos;
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for iter := Iterate(&buffer, range.min, range.max); IsValid(iter); Advance(&iter) {
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world_pos := CalculateWorldPos(pos);
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rect := Rect2PSize(world_pos.x, world_pos.y, Monosize.x, Monosize.y);
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DrawRect(rect, {0, 255, 0, 40});
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pos.x += 1;
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if iter.item == '\n' {
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pos.x = 0;
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pos.y += 1;
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}
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}
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}
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// Draw cursor
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{
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c := CalculateVisualPos(&buffer, MainCursor.b);
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p := CalculateWorldPos(c);
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cursor_size: f32 = Monosize.x * 0.2;
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rect := Rect2PSize(p.x, p.y, Monosize.x, Monosize.y);
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rect = CutLeft(&rect, cursor_size);
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DrawRect(rect, RED);
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}
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// Draw bar
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{
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DrawRect(bar, LIGHTGRAY);
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scroll_start_normalized := :f32(Scroll.y) / :f32(buffer_end_wpos.y);
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scroll_start := scroll_start_normalized * GetRectSize(bar).y;
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CutTop(&bar, scroll_start);
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marker := CutTop(&bar, 20);
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DrawRect(marker, GRAY);
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}
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EndDrawing();
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}
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CloseWindow();
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return 0;
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} |