147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/**
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* Copyright (c) 2022 Dominic Masters
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*
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* This software is released under the MIT License.
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* https://opensource.org/licenses/MIT
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*/
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#include "textbox.h"
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char TEXTBOX_TEXTS[TEXTBOX_SCROLL_ROWS_MAX * TEXTBOX_CHARS_PER_ROW];
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uint8_t TEXTBOX_ROW_COUNT;
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uint8_t TEXTBOX_ROW_TILE_LAST;
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uint8_t TEXTBOX_ROW_CURRENT;
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uint8_t TEXTBOX_STATE;
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uint8_t TEXTBOX_SCROLL;
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inline void conversationTextboxInit() {
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// Reset textbox state
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TEXTBOX_STATE = 0;
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}
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void conversationTextboxSetText(char *text) {
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uint8_t i, j, k, rowStart, stateFlags;
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char c, c2;
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// Begin by filling the textbox text chars with whitespace to begin.
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// TODO: I'm pretty sure I can move this lower and optimize.
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for(i = 0; i < TEXTBOX_SCROLL_ROWS_MAX * TEXTBOX_CHARS_PER_ROW; i++) {
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TEXTBOX_TEXTS[i] = ' ';
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}
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// Reset textbox state
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TEXTBOX_STATE = TEXTBOX_STATE_VISIBLE;
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TEXTBOX_SCROLL = 0;
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TEXTBOX_ROW_COUNT = 0;
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TEXTBOX_ROW_COUNT = 1;
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// Copy source text to buffer, also determine wordwrapping here.
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i = 0, j = 0, rowStart = 0, stateFlags = 0;
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while((c = text[i]) != '\0') {// "For each char in string"
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if(c == ' ') {
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// Scan ahead and look at how many chars remain to the next space.
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k = i + 1;
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while(
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(c2 = text[k]) != '\0' &&
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c2 != '\n' &&
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c2 != ' ' &&
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(k - rowStart) < TEXTBOX_CHARS_PER_ROW
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) k++;
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// IF that number is less than the remaining chars on the current row,
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// then treat this space like a newline.
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if(k >= (rowStart + TEXTBOX_CHARS_PER_ROW + 1)) {
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stateFlags |= 1 << 0;
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}
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} else if(c == '\n') {
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stateFlags |= 1 << 0;
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}
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// Do we need to insert newline where we are currently?
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if((stateFlags & (1 << 0)) != 0) {
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stateFlags &= ~(1 << 0);// Remove newline flag
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i++;
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rowStart = i;// Update the row start (Should this be i+1?)
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//TODO: can I optimize the next line by using rowStart somehow?
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j = ((j / TEXTBOX_CHARS_PER_ROW)+1) * TEXTBOX_CHARS_PER_ROW;// Update destination character position.
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TEXTBOX_ROW_COUNT++;
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continue;
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}
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// Insert the character
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TEXTBOX_TEXTS[j] = c;
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i++;
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j++;
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}
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// Now we have organized the string nicely we can prep for rendering. Fill the
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// tiles with blank chars.
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textboxFillBlank();
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WY_REG = TEXTBOX_WINDOW_Y * TILE_HEIGHT;
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SHOW_WIN;
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}
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inline void textboxFillBlank() {
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uint8_t tiles[TEXTBOX_WIDTH_IN_TILES * TEXTBOX_HEIGHT_IN_TILES];
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spriteBorderBufferEdges(
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tiles, TEXTBOX_WIDTH_IN_TILES, TEXTBOX_HEIGHT_IN_TILES, SPRITE_TILESET_WHITE_HIGH
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);
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spriteBufferWindow(
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0x00, TEXTBOX_Y,
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TEXTBOX_WIDTH_IN_TILES, TEXTBOX_HEIGHT_IN_TILES,
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tiles
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);
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}
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inline void conversationTextboxUpdate() {
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uint8_t i, tile;
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char c;
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// Is the textbox visible?
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if((TEXTBOX_STATE & TEXTBOX_STATE_VISIBLE) == 0) return;
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// Have we finished scrolling?
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if(TEXTBOX_STATE & TEXTBOX_STATE_SCROLLED) {
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// Is the user trying to go to the next line?
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if(INPUT_PRESSED & J_A) {
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// First, lets figure out if there's any more text to reveal or not.
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if((TEXTBOX_ROW_COUNT - TEXTBOX_ROW_CURRENT) < TEXTBOX_TILES_ROWS) {
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TEXTBOX_STATE &= ~TEXTBOX_STATE_VISIBLE;
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HIDE_WIN;
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LCDC_REG |= LCDCF_BG8000;
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conversationQueueNext();
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return;
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}
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TEXTBOX_STATE &= ~TEXTBOX_STATE_SCROLLED;
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TEXTBOX_SCROLL = 0;
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TEXTBOX_ROW_CURRENT += TEXTBOX_TILES_ROWS;
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textboxFillBlank();
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}
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return;
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}
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// Move to the next character.
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i = TEXTBOX_ROW_CURRENT * TEXTBOX_CHARS_PER_ROW;
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c = TEXTBOX_TEXTS[i+TEXTBOX_SCROLL];
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if(TEXTBOX_SCROLL == TEXTBOX_CHARS_MAX) {
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TEXTBOX_STATE |= TEXTBOX_STATE_SCROLLED;
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} else {
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tile = spriteFontTileFromChar(c);
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spriteBufferWindow(
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0x01 + (TEXTBOX_SCROLL % TEXTBOX_CHARS_PER_ROW),
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TEXTBOX_Y + 0x01 + (TEXTBOX_SCROLL / TEXTBOX_CHARS_PER_ROW),
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1, 1,
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&tile
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);
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TEXTBOX_SCROLL++;
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// Skip spaces
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while(TEXTBOX_SCROLL < TEXTBOX_CHARS_MAX && TEXTBOX_TEXTS[i+TEXTBOX_SCROLL] == ' ') TEXTBOX_SCROLL++;
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}
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} |