examples

commit 09f76348c7262c0af259ea58f2cf14ab97473c20
parent 539e3e7517fc4138a64aeaa3caf90cc8818cd677
Author: Henry Wilson <henry@henryandlizzy.uk>
Date:   Fri, 26 Aug 2022 21:54:11 +0100

elastic-tabstops: Add ET converter

Diffstat:
A
src/elastic-tabstops.cpp
 | 
106
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 106 insertions(+), 0 deletions(-)
diff --git a/src/elastic-tabstops.cpp b/src/elastic-tabstops.cpp
@@ -0,0 +1,106 @@
+#include <iostream>
+#include <vector>
+#include <cassert>
+#include <sstream>
+#include <memory>
+
+#if 1
+#define DIM	"\e[2m"
+#define RESET	"\e[m"
+#define INDENT	DIM "   >>   " RESET
+#define PADDING	DIM " »" RESET
+#else
+#define INDENT	"      "
+#define PADDING	"  "
+#endif
+
+using namespace std;
+
+struct column
+{
+	size_t width;
+	bool is_indent;
+};
+
+struct cell
+{
+	string str;
+	shared_ptr<column> column_ref;
+};
+
+struct line
+{
+	vector<cell> cells;
+	string tail;
+};
+
+vector<line> backlog;
+
+void flush_backlog()
+{
+	for (auto& line : backlog)
+	{
+		for (auto& c : line.cells)
+		{
+			if (c.column_ref->is_indent)
+				cout << INDENT;
+			else
+			{
+				c.str.resize(c.column_ref->width, ' ');
+				cout << c.str << PADDING;
+			}
+		}
+		cout << line.tail << endl;
+	}
+	backlog.clear();
+}
+
+int main()
+{
+	string buf;
+	vector<size_t> chunk_stack;
+	vector<shared_ptr<column>> columns;
+
+	while (getline(cin, buf))
+	{
+		struct line l;
+		istringstream in2(move(buf));
+
+		while (getline(in2, buf, '\t'))
+			l.cells.push_back({move(buf), {}});
+
+		if (l.cells.size())
+		{
+			l.tail = move(l.cells.back().str);
+			l.cells.pop_back();
+		}
+
+		columns.resize(l.cells.size());
+
+		bool indenting = true;
+		for (size_t i = 0; i < columns.size(); ++i)
+		{
+			auto& p = columns[i];
+			auto width = l.cells[i].str.size();
+
+			if (width)
+				indenting = false;
+
+			if (p)
+			{
+				p->width = max(p->width, width);
+				p->is_indent &= indenting;
+			} else
+				p = make_shared<column>(column{width, indenting});
+
+			l.cells[i].column_ref = p;
+		}
+
+		backlog.push_back(move(l));
+		auto& C = backlog.back().cells;
+
+		if (C.empty())
+			flush_backlog();
+	}
+	flush_backlog();
+}