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80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
/*
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font.cpp
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Copyright (C) 2007 Acekard, www.acekard.com
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Copyright (C) 2007-2009 somebody
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Copyright (C) 2009 yellow wood goblin
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SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include "font.h"
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#include <nds.h>
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#include <string.h>
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#include "dbgtool.h"
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#include "systemfilenames.h"
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cFont::cFont() {}
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cFont::~cFont() {}
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u32 cFont::getStringScreenWidth(const char* str, size_t len) {
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if (NULL == str || 0 == len) return 0;
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size_t strLen = strlen(str);
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if (len > strLen) len = strLen;
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const char* endstr = str + len;
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u32 width = 0;
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const char* p = str;
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while (*p != 0 && p < endstr) {
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u32 ww, add;
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Info(p, &ww, &add);
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width += ww;
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p += add;
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}
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return width;
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}
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std::string cFont::breakLine(const std::string& text, u32 maxLineWidth) {
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if (0 == maxLineWidth) return text;
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std::string ret;
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// 找空格
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// 找到之后，和上次空格相减，传入 计算width 函数
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// 如果tempwdith超过 maxwidth，把上次的空格换成 \n
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// tempwidth 清零，继续
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const char* p = text.c_str();
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bool hasSpace = false;
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u32 tempWidth = 0;
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while (*p != 0) {
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u32 ww, add;
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Info(p, &ww, &add);
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if (' ' == *p) hasSpace = true;
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tempWidth += ww;
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if (tempWidth > maxLineWidth) {
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if (hasSpace) {
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u32 lastSpacePos = ret.find_last_of(' ');
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ret[lastSpacePos] = '\n';
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tempWidth = getStringScreenWidth(text.c_str() + lastSpacePos,
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(size_t)(p - text.c_str()) - lastSpacePos);
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hasSpace = false;
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} else {
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ret.push_back('\n');
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tempWidth = 0;
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}
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}
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for (u32 ii = 0; ii < add; ii++) ret.push_back(*p++);
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}
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if (ret[ret.length() - 1] != '\n') ret.push_back('\n');
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return ret;
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}
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u32 cFont::FontRAM(void) {
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return 0;
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}
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