82 lines
3.0 KiB
C++
82 lines
3.0 KiB
C++
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#include <cstdint>
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// #include <afxres.h>
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#include <iterator>
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#include <iostream>
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/* Library routines to output text and "word wrap" so that words are not broken across lines. */
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uint16_t consoleWidth = 80;
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uint16_t currentConsoleOffset = 5;
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/**
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* Set up the word wrap library.
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*/
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void initWordWrap() {
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/* Find the width of the console window. */
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// CONSOLE_SCREEN_BUFFER_INFO csbi{};
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// GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE),&csbi);
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/* We subtract 2 because Windows doesn't allow for the right hand scroll bar when reporting
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* width of command prompt windows. */
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// consoleWidth = static_cast<uint16_t>(csbi.srWindow.Right - csbi.srWindow.Left - 2);
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currentConsoleOffset = 0;
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}
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/**
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* Output a string with word wrap.
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* @param text Pointer to the string to output.
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*/
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void wrapOut(const std::string *text) {
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size_t len = text->length(); // Length of the string
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size_t position = 0; // How much of the string we've printed
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std::ostream_iterator<char> iout(std::cout); // Iterators for the string and display
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std::string::const_iterator strInt = text->begin();
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const char *rawString = text->data();
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while (position < len) {
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// How much space do we have left on the current console line?
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size_t left = (consoleWidth - currentConsoleOffset);
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if ((len - position) < left) { // Can we fit the whole string on this line?
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std::cout << &rawString[position] << " "; // Yes, just do it.
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currentConsoleOffset += len + 1; // Update our position on this line.
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break;
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} else { // We can't fit the whole string on this line.
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size_t lastSpace = left; // This would be the last character we did fit on this line
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// Move this pointer back until we find a space
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while ((rawString[position + lastSpace] != ' ') && (lastSpace > 0)) {
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lastSpace--;
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}
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// Print up to that space using the output iterator
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std::copy(strInt + position, strInt + position + lastSpace, iout);
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// Print an end-of-line, unless the string ended exactly at the end of the line in which case the
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// cursor has automatically moved to the next line
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if (lastSpace < left) {
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std::cout << std::endl;
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}
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position += lastSpace + 1; // Mark how much of the string we've printed
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currentConsoleOffset = 0; // Since we just created a new line, we're now at the start of it
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}
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}
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}
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void wrapOut(const std::string& text) {
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wrapOut(&text);
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}
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/**
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* Ends a paragraph of word wrapped output.
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*/
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void wrapEndPara() {
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// If we aren't at the end of a line already, end the line
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if (currentConsoleOffset != 0) {
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std::cout << std::endl;
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}
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// And print a blank line
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std::cout << std::endl;
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// Since we just started a new line, we're now at the start of it
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currentConsoleOffset = 0;
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}
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