diff options
Diffstat (limited to 'ui_box.h')
| -rw-r--r-- | ui_box.h | 472 |
1 files changed, 0 insertions, 472 deletions
diff --git a/ui_box.h b/ui_box.h deleted file mode 100644 index c19b9dd..0000000 --- a/ui_box.h +++ /dev/null @@ -1,472 +0,0 @@ -#ifndef BOX_H -#define BOX_H - -// assumes MAX_INPUT_LEN to be set -// -// #define MAX_INPUT_LEN 128 - -#define TEXTBOX_PADDING_X 1 -#define TEXTBOX_BORDER_WIDTH 1 -#define TEXTBOX_MIN_WIDTH TEXTBOX_PADDING_X * 2 + TEXTBOX_BORDER_WIDTH * 2 + 1; -#define TEXTBOXFROMBOX(Box) \ - { \ - .X = Box.X + TEXTBOX_BORDER_WIDTH + TEXTBOX_PADDING_X, \ - .Y = Box.Y + TEXTBOX_BORDER_WIDTH, \ - .W = Box.W - TEXTBOX_BORDER_WIDTH * 2 - TEXTBOX_PADDING_X * 2, \ - .H = Box.H - TEXTBOX_BORDER_WIDTH * 2 \ - } - -void DrawBox(rect Rect, box_characters *Chars); -void ScrollLeft(rect Text, u32 *TextOffset); -void ScrollRight(rect Text, u32 *TextOffset); -void TextBoxDelete(wchar_t* Text, u64 Pos); -void TextBoxInsert(wchar_t *Input, u32 InputPos, u32 InputLen, wchar_t ch); -u32 TextBoxKeypress(struct tb_event ev, rect TextR, wchar_t *Text, u32 *TextLenPtr, u32 TextPos, u32 *TextOffsetPtr); -void TextBoxDrawText(rect TextR, wchar_t *Input, u32 InputLen, u32 TextOffset); - -// Draw box along boundaries in Rect with optional Chars. -void -DrawBox(rect Rect, box_characters *Chars) -{ - wchar_t ur, ru, rd, dr, lr, ud; - if (!Chars) - { - ur = L'╭'; - ru = L'╯'; - rd = L'╮'; - dr = L'╰'; - lr = L'─'; - ud = L'│'; - } - else - { - ur = Chars->ur; - ru = Chars->ru; - rd = Chars->rd; - dr = Chars->dr; - lr = Chars->lr; - ud = Chars->ud; - } - - Rect.H--; - Rect.W--; - - tb_printf(Rect.X, Rect.Y, 0, 0, "%lc", ur); - for (s32 X = 1; X < Rect.W; X++) - { - tb_printf(Rect.X + X, Rect.Y, 0, 0, "%lc", lr); - } - tb_printf(Rect.X + Rect.W, Rect.Y, 0, 0, "%lc", rd); - - // Draw vertical bars - for (s32 Y = 1; Y < Rect.H; Y++) - { - tb_printf(Rect.X, Rect.Y + Y, 0, 0, "%lc", ud); - tb_printf(Rect.X + Rect.W, Rect.Y + Y, 0, 0, "%lc", ud); - } - - tb_printf(Rect.X, Rect.Y + Rect.H, 0, 0, "%lc", dr); - for (s32 X = 1; X < Rect.W; X++) - { - tb_printf(Rect.X + X, Rect.Y + Rect.H, 0, 0, "%lc", lr); - } - tb_printf(Rect.X + Rect.W, Rect.Y + Rect.H, 0, 0, "%lc", ru); -} - -// SCROLLING -// ╭──────────╮ ╭──────────╮ Going Left on the first character scrolls up. -// │ █3 4 │ => │ 1 2█ │ Cursor on end of the top line. -// │ 5 6 │ │ 3 4 │ -// ╰──────────╯ ╰──────────╯ -// -// ╭──────────╮ ╭──────────╮ Going Right on the last character scrolls down. -// │ 1 3 │ => │ 2 4 │ Puts cursor on start of the bottom line. -// │ 2 4█ │ │ █ │ -// ╰──────────╯ ╰──────────╯ -// -// ╭──────────╮ ╭──────────╮ Going Down on bottom line scrolls down. -// │ 1 3 │ => │ 2 4 │ Cursor stays on bottom line. -// │ 2 █ 4 │ │ █ │ -// ╰──────────╯ ╰──────────╯ -// -// ╭──────────╮ ╭──────────╮ Going Up on top line scrolls up. -// │ 3 █ 4 │ => │ 1 █ 2 │ Cursor stays on top line. -// │ 5 6 │ │ 3 5 │ -// ╰──────────╯ ╰──────────╯ -// -// In code this translates to changing global.cursor_{x,y} and TextOffset accordingly. - -// Scroll one character to the left -void -TextBoxScrollLeft(rect Text, u32 *TextOffset) -{ - // If text is on the first character of the box scroll up - if (global.cursor_x == Text.X && - global.cursor_y == Text.Y) - { - global.cursor_x = Text.X + Text.W - 1; - global.cursor_y = Text.Y; - - *TextOffset -= Text.W; - } - else - { - if (global.cursor_x == Text.X) - { - // Got to previous line - global.cursor_x = Text.X + Text.W - 1; - global.cursor_y--; - } - else - { - global.cursor_x--; - } - } -} - -// Scroll one character to the right -void -TextBoxScrollRight(rect Text, u32 *TextOffset) -{ - // If cursor is on the last character scroll forwards - if (global.cursor_x == Text.X + Text.W - 1 && - global.cursor_y == Text.Y + Text.H - 1) - { - global.cursor_x = Text.X; - global.cursor_y = Text.Y + Text.H - 1; - - *TextOffset += Text.W; - } - else - { - global.cursor_x++; - if (global.cursor_x == Text.X + Text.W) - { - global.cursor_x = Text.X; - global.cursor_y++; - } - } -} - - -// Delete a character in Text at Pos -void -TextBoxDelete(wchar_t* Text, u64 Pos) -{ - memmove(Text + Pos, - Text + Pos + 1, - (MAX_INPUT_LEN - Pos - 1) * sizeof(*Text)); -} - -// Insert a ev.ch in Input at InputPos -void -TextBoxInsert(wchar_t *Input, u32 InputPos, u32 InputLen, wchar_t ch) -{ - if (InputPos < InputLen) - { - memmove(Input + InputPos, - Input + InputPos - 1, - (InputLen - InputPos + 1) * sizeof(*Input)); - } - Input[InputPos] = ch; -} - -// Handle the key event and edit Input and updates TextLenPtr and TextOffsetPtr accordingly. -// InputPos is the position in the Input relating to the cursor position. -// TextR is the bounding box for the text. -// Returns 0 no key event was handled -u32 -TextBoxKeypress(struct tb_event ev, rect TextR, - wchar_t *Text, u32 *TextLenPtr, u32 TextPos, u32 *TextOffsetPtr) -{ - u32 Result = 1; - - u32 TextLen = *TextLenPtr; - u32 TextOffset = *TextOffsetPtr; - - switch (ev.key) - { - - // Delete character backwards - case TB_KEY_CTRL_8: - // case TB_KEY_BACKSPACE2: - { - if (TextPos == 0) break; - - TextBoxDelete(Text, TextPos - 1); - TextLen--; - - TextBoxScrollLeft(TextR, &TextOffset); - - } break; - - // Delete character forwards - case TB_KEY_CTRL_D: - { - if (TextPos == TextLen) break; - TextBoxDelete(Text, TextPos); - TextLen--; - // Delete(Text, Position) - } break; - - // Delete word backwards - case TB_KEY_CTRL_W: - { - u32 At = TextPos; - // Find character to stop on - while (At && is_whitespace(Text[At - 1])) At--; - while (At && !is_whitespace(Text[At - 1])) At--; - - s32 NDelete = TextPos - At; - memmove(Text + At, Text + TextPos, (TextLen - TextPos) * sizeof(Text[At])); - TextLen -= NDelete; -#ifdef DEBUG - Text[TextLen] = 0; -#endif - // NOTE: this could be calculated at once instead - while(NDelete--) TextBoxScrollLeft(TextR, &TextOffset); - - Assert(IsInRect(TextR, global.cursor_x, global.cursor_y)); - - } break; - - // Delete until start of Text - case TB_KEY_CTRL_U: - { - memmove(Text, Text + TextPos, (TextLen - TextPos) * sizeof(*Text)); - TextLen -= TextPos; -#ifdef DEBUG - Text[TextLen] = 0; -#endif - global.cursor_x = TextR.X; - global.cursor_y = TextR.Y; - TextOffset = 0; - } break; - - // Delete until end of Text - case TB_KEY_CTRL_K: - { - TextLen = TextPos; - Text[TextPos] = 0; - } break; - - // Move to start of line - case TB_KEY_CTRL_A: global.cursor_x = TextR.X; break; - - // Move to end of line - case TB_KEY_CTRL_E: - { - if (global.cursor_x == TextR.X + TextR.W - 1) break; - - if (TextPos + TextR.W > TextLen) - { - // Put the cursor on the last character - global.cursor_x = TextR.X + (TextLen - TextOffset) % TextR.W; - } - else - { - global.cursor_x = TextR.X + TextR.W - 1; - } - } break; - - // Move backwards - case TB_KEY_CTRL_B: - case TB_KEY_ARROW_LEFT: - { - // Move forward by word - if (ev.mod == TB_MOD_CTRL) - { - u32 At = TextPos; - while(At && is_whitespace(Text[At])) At--; - while(At && !is_whitespace(Text[At])) At--; - while(TextPos - At++) TextBoxScrollLeft(TextR, &TextOffset); - } - // Move forward by character - else - { - if (TextPos == 0) break; - TextBoxScrollLeft(TextR, &TextOffset); - } - } break; - - // Move forwards - case TB_KEY_CTRL_F: - case TB_KEY_ARROW_RIGHT: - { - // Move forward by word - if (ev.mod == TB_MOD_CTRL) - { - u32 At = TextPos; - while(At < TextLen && is_whitespace(Text[At])) At++; - while(At < TextLen && !is_whitespace(Text[At])) At++; - while(At-- - TextPos) TextBoxScrollRight(TextR, &TextOffset); - } - // Move forward by character - else - { - if (TextPos == TextLen) break; - TextBoxScrollRight(TextR, &TextOffset); - } - } break; - - // Move up - case TB_KEY_CTRL_P: - case TB_KEY_ARROW_UP: - { - if (global.cursor_y == TextR.Y) - { - if (TextOffset == 0) - { - global.cursor_x = TextR.X; - - break; - } - - TextOffset -= TextR.W; - global.cursor_y = TextR.Y; - } - else - { - global.cursor_y--; - } - } break; - - // Move down - case TB_KEY_CTRL_N: - case TB_KEY_ARROW_DOWN: - { - if (TextPos + TextR.W > TextLen) - { - // Put the cursor on the last character - global.cursor_x = TextR.X + (TextLen - TextOffset) % (TextR.W); - global.cursor_y = TextR.Y + (TextLen - TextOffset) / TextR.W; - - // If cursor ended 1 line under the bottom line this means that the text - // needs to be scrolled. - if (global.cursor_y == TextR.Y + TextR.H) - { - TextOffset += TextR.W; - global.cursor_y--; - } - - break; - } - - if (global.cursor_y == TextR.Y + TextR.H - 1) - { - TextOffset += TextR.W; - } - else - { - global.cursor_y++; - } - } break; - default: - { - Result = 0; - } - } - - *TextLenPtr = TextLen; - *TextOffsetPtr = TextOffset; - - return Result; -} - -// Draws characters in Input in the TextR rectangle. -// Skip printing TextOffset amount of characters. -// InputLen is the amount of characters in Input. -// -// NOTE: TextR is always filled, when not enough characters in Input it will uses spaces instead. -// This makes it easy to update the textbox by recalling this function. -void -TextBoxDraw(rect TextR, wchar_t *Text, u32 TextLen) -{ - // Draw the text right of the cursor - // NOTE: the cursor is assumed to be in the box - Assert(IsInRect(TextR, global.cursor_x, global.cursor_y)); - s32 AtX = TextR.X, AtY = TextR.Y; - u32 At = 0; - while (AtY < TextR.Y + TextR.H) - { - if (At < TextLen) - { - tb_printf(AtX++, AtY, 0, 0, "%lc", Text[At++]); - } - else - { - tb_printf(AtX++, AtY, 0, 0, " "); - } - - if (AtX == TextR.X + TextR.W) { AtY++; AtX = TextR.X; } - } -} - -// NOTE: To ensure that the text looks the same even when scrolling it you must provide the whole text, -// wrap the whole text and the only show the portion that can fit in the Text Rectangle. - -// When line will exceed width break the word on the next line. This is done by looking backwards -// for whitespace from TextR.W width. When a whitespace is found text is wrapped on the next line. -void -TextBoxDrawWrapped(rect TextR, wchar_t *Text, u32 TextLen) -{ - if (TextLen <= TextR.W) - { - tb_printf(TextR.X, TextR.Y, 0, 0, "%ls", Text); - tb_present(); - global.cursor_x = TextR.X + TextLen; - global.cursor_y = TextR.Y; - return; - } - - u32 SearchIndex = TextR.W; - u32 PrevIndex = 0; - u32 Y = TextR.Y; - - while (SearchIndex < TextLen) - { - while (Text[SearchIndex] != ' ') - { - SearchIndex--; - if (SearchIndex == PrevIndex) - { - SearchIndex += TextR.W; - break; - } - } - - // Wrap - wchar_t BreakChar = Text[SearchIndex]; - Text[SearchIndex] = 0; - tb_printf(TextR.X, Y, 0, 0, "%ls", Text + PrevIndex); - tb_present(); - Text[SearchIndex] = BreakChar; - - if (Y + 1 == TextR.Y + TextR.H) - { - global.cursor_y = Y; - global.cursor_x = TextR.X + (SearchIndex - PrevIndex); - return; - } - Y++; - - if (BreakChar == L' ') - { - SearchIndex++; - } - - PrevIndex = SearchIndex; - SearchIndex += TextR.W; - } - - // This happens when SearchIndex exceeds TextLen but there is still some - // text left to print. We can assume that the text will fit because otherwise it would have - // been wrapped a second time and the loop would have returned. - tb_printf(TextR.X, Y, 0, 0, "%ls", Text + PrevIndex); - // NOTE: this sets the cursor position correctly - - global.cursor_y = Y; - global.cursor_x = TextR.X + TextLen - PrevIndex; -} - -#endif // BOX_H |