Basic text rendering working;

Added Font (done) and SymbolFont (skeleton);
Added styling to set;
Added CountourMap;
Some script fixes

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@73 0fc631ac-6414-0410-93d0-97cfa31319b6

src/render/text/viewer.hpp

@@ -0,0 +1,97 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) 2001 - 2006 Twan van Laarhoven                           |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#ifndef HEADER_RENDER_TEXT_VIEWER
+#define HEADER_RENDER_TEXT_VIEWER
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+#include <util/rotation.hpp>
+#include <data/field/text.hpp>
+#include <render/text/element.hpp>
+
+// ----------------------------------------------------------------------------- : TextViewer
+
+/// Class for viewing and determining positions in formated text
+/** It can:
+ *  - Draw text to a DC
+ *  - Draw selection to a DC
+ *  - Convert between screen coordinates and cursor position
+ *
+ * To refer to positions in the text this class uses several concepts:
+ *  - index     An index in the input string.
+ *              For cursor positions char_id = 0 means the cursor is BEFORE character 0
+ *  - pos       The position of a character in real world x,y coordinates (in pixels)
+ *              The position is the top-left of the character.
+ *              A char_pos is often only the x coordinate.
+ *              A line_pos is often only the y coordinate.
+ *  - Line      A line on the screen, this does not neccessarly correspond to explicit linebreaks,
+ *              since textwrapping also leads to a new line.
+ *  - line_id   The index of a line, 0 is the first line.
+ */
+class TextViewer {
+  public:
+	/// Information on a line in the textbox
+	struct Line;
+	
+	TextViewer();
+	~TextViewer();
+	
+	// --------------------------------------------------- : Drawing
+	
+	/// Draw the given text with the given text style
+	/** The drawing information is cached,
+	 *  before calling draw again with different text/style reset() should be called
+	 */
+	void draw(RotatedDC& dc, const String& text, const TextStyle& style, Context&, DrawWhat);
+	/// Draw an indicator for selected text
+	void drawSelection(RotatedDC& dc, const TextStyle& style, size_t sel_start, size_t sel_end);
+	
+	/// Reset the cached data, at a new call to draw it will be recalculated
+	void reset();
+	
+	// --------------------------------------------------- : Positions
+	
+	/// Find the character index that is before the given index, and which has a nonzero width
+	size_t moveLeft(size_t index) const;
+	/// Find the character index that is on a line above/below index
+	/** If this would move outisde the text, returns the input index */
+	size_t moveLine(size_t index, int delta) const;
+	/// The character index of the start of the line that character #index is on
+	size_t lineStart(size_t index) const;
+	/// The character index past the end of the line that character #index is on
+	size_t lineEnd  (size_t index) const;
+	
+  private:
+	// --------------------------------------------------- : More drawing
+	double scale; /// < Scale when drawing
+	
+	// --------------------------------------------------- : Elements
+	TextElements elements; ///< The elements of the prepared text
+	
+	/// Find the elements in a string and add them to elements
+	void prepareElements(const String&, const TextStyle& style, Context& ctx);
+	
+	// --------------------------------------------------- : Lines
+	vector<Line> lines; ///< The lines in the text box
+	
+	/// Prepare the lines, layout the text
+	void prepareLines(RotatedDC& dc, const String& text, const TextStyle& style);
+	/// Prepare the lines, layout the text; at a specific scale
+	bool prepareLinesScale(RotatedDC& dc, const String& text, const TextStyle& style, bool stop_if_too_long);
+	/// Find the line the given index is on, returns the first line if the index is not found
+	const Line& findLine(size_t index) const;
+	
+	// helper : get the start coordinate of a line, this is 0 unless there is a contour mask
+	double lineLeft (RotatedDC& dc, const TextStyle& style, double y);
+	// helper : get the end coordinate of a line, this is width unless there is a contour mask
+	double lineRight(RotatedDC& dc, const TextStyle& style, double y);
+};
+
+
+// ----------------------------------------------------------------------------- : EOF
+#endif