Mercurial > projects > mde
view mde/content/AStringContent.d @ 128:41582439a42b
Added support for dynamic EnumContent loading and saving, with translation loading.
WMScreen.init removed; code moved to this() since class is now created by main() instead of a static this().
Fix for SwitchWidget not passing events. Still some resizing bugs evident in SwitchWidget :-(
author | Diggory Hardy <diggory.hardy@gmail.com> |
---|---|
date | Wed, 14 Jan 2009 20:24:14 +0000 |
parents | c9843fbaac88 |
children | 9f035cd139c6 |
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/* LICENSE BLOCK Part of mde: a Modular D game-oriented Engine Copyright © 2007-2008 Diggory Hardy This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /** The content system − string-based editable content. */ module mde.content.AStringContent; public import mde.content.Content; //FIXME: efficient conversions? Need to dup result when formatting a string anyway? import Int = tango.text.convert.Integer; import Float = tango.text.convert.Float; import derelict.sdl.keysym; import tango.util.log.Log : Log, Logger; private Logger logger; static this () { logger = Log.getLogger ("mde.content.AStringContent"); } // Used by Options template ContentN(T) { static if (is(T == bool)) { const char[] ContentN = "BoolContent"; } else static if (is(T == int)) { const char[] ContentN = "IntContent"; } else static if (is(T == double)) { const char[] ContentN = "DoubleContent"; } else static if (is(T == char[])) { const char[] ContentN = "StringContent"; } else static assert (false, "No Content of type "~T.stringof); } /** Base class for content containing a simple value editable as text. All content types used by * Options extend this class. * * All derived classes should have the following functions: * --- * char[] endEdit (); // Should convert sv and assign to self, then call endEvent * // Used by Options: * BoolContent changeCb (void delegate (char[] symbol,T value) cb); // The callback used by Options * void assignNoCb (T val); // assign val, but without calling callbacks * --- * On any assignation (by this, assignNoCb, opAssign) the value should be converted to a string and * assigned to sv, and pos should be clamped to [0,sv.length] (i.e. enforce pos <= sv.length). */ abstract class AStringContent : Content { protected this (char[] symbol) { super (symbol); } /// Get the text. override char[] toString (uint i) { return i == 0 ? sv : i == 1 ? name_ : i == 2 ? desc_ : null; } /** Acts on a keystroke and returns the new value. * * Supports one-line editing: left/right, home/end, backspace/delete. */ char[] keyStroke (ushort sym, char[] i) { debug assert (i.length, "StringContent.keyStroke: no value (??)"); // impossible? char k = *i; if (k >= 0x20) { if (k == 0x7f) { // delete size_t p = pos; if (p < sv.length) ++p; while (p < sv.length && (sv[p] & 0x80) && !(sv[p] & 0x40)) ++p; sv = sv[0..pos] ~ sv[p..$]; } else { // insert character char[] tail = sv[pos..$]; sv.length = sv.length + i.length; size_t npos = pos+i.length; if (tail) sv[npos..$] = tail.dup; // cannot assign with overlapping ranges sv[pos..npos] = i; pos = npos; } } else { // use sym; many keys output 0 if (sym >= SDLK_RSHIFT && (sym <= SDLK_COMPOSE || sym == SDLK_MENU)) { } // all modifier keys and contect menu key; should be ignored else if (sym == SDLK_BACKSPACE) { // backspace; k == 0x8 char[] tail = sv[pos..$]; if (pos) --pos; while (pos && (sv[pos] & 0x80) && !(sv[pos] & 0x40)) --pos; sv = sv[0..pos] ~ tail; } else if (sym == SDLK_LEFT) { if (pos) --pos; while (pos && (sv[pos] & 0x80) && !(sv[pos] & 0x40)) --pos; } else if (sym == SDLK_RIGHT) { if (pos < sv.length) ++pos; while (pos < sv.length && (sv[pos] & 0x80) && !(sv[pos] & 0x40)) ++pos; } else if (sym == SDLK_HOME || sym == SDLK_UP) { pos = 0; } else if (sym == SDLK_END || sym == SDLK_DOWN) { pos = sv.length; } else debug logger.trace ("Unhandled symbol: {}", sym); } return sv; } /** Get the character the edit cursor is in front of. * * NOTE: unused. */ size_t editIndex () { size_t i = 0; for (size_t p = 0; p < pos; ++p) if (!(sv[p] & 0x80) || sv[p] & 0x40) ++i; return i; } /** Set the edit position in front of i'th character. * * Assumes at least i characters are present; if not this will work but not be optimal. */ void editIndex (size_t i) { pos = 0; for (; i > 0; --i) { // NOTE: could be slightly optimised if (pos < sv.length) ++pos; while (pos < sv.length && (sv[pos] & 0x80) && !(sv[pos] & 0x40)) ++pos; } } /** Call after editing a string; return new string (may be changed/reverted). */ char[] endEdit (); protected: char[] sv; // string of value; updated on assignment for displaying and editing size_t pos; // editing position; used by keyStroke } class BoolContent : AStringContent { /** Create a content with _symbol name symbol. */ this (char[] symbol, bool val = false) { assignNoCb (val); super (symbol); } // for use by EnumValueContent protected this (char[] symbol, int dummy) { super (symbol); } void assignNoCb (bool val) { v = val; sv = v ? "true" : "false"; if (pos > sv.length) pos = sv.length; } void opAssign (bool val) { assignNoCb (val); endEvent; } bool opCall () { return v; } alias opCall opCast; override char[] endEdit () { v = sv && (sv[0] == 't' || sv[0] == 'T' || sv[0] == '1'); sv = v ? "true" : "false"; endEvent; return sv; } protected: bool v; } /** Text content. */ class StringContent : AStringContent { this (char[] symbol, char[] val = null) { v = val; super (symbol); } void assignNoCb (char[] val) { v = val; if (pos > sv.length) pos = sv.length; } void opAssign (char[] val) { assignNoCb (val); endEvent; } char[] opCall () { return v; } alias opCall opCast; override char[] endEdit () { endEvent; return sv; } protected: alias sv v; // don't need separate v and sv in this case } /** Integer content. */ class IntContent : AStringContent { /** Create a content with _symbol name symbol. */ this (char[] symbol, int val = 0) { assignNoCb (val); super (symbol); } void assignNoCb (int val) { v = val; sv = Int.toString (v); if (pos > sv.length) pos = sv.length; } void opAssign (int val) { assignNoCb (val); endEvent; } int opCall () { return v; } alias opCall opCast; override char[] endEdit () { try { v = Int.toInt (sv); } catch (Exception e) { logger.warn (e.msg); } sv = Int.toString (v); endEvent; return sv; } protected: int v = 0; // must be a valid value for EnumContent (i.e. 0) } /** Double content. */ class DoubleContent : AStringContent { /** Create a content with _symbol name symbol. */ this (char[] symbol, double val = 0) { assignNoCb (val); super (symbol); } void assignNoCb (double val) { v = val; sv = Float.toString (v, 8, 4); if (pos > sv.length) pos = sv.length; } void opAssign (double val) { assignNoCb (val); endEvent; } double opCall () { return v; } alias opCall opCast; override char[] endEdit () { try { v = Float.toFloat (sv); } catch (Exception e) { logger.warn (e.msg); } sv = Float.toString (v, 8, 4); endEvent; return sv; } protected: double v; } /** A content representing an enumeration. * * Extends IntContent for Options support. */ class EnumContent : IntContent, IContentList { /** CTOR. * * Params: * enumSymbols = Symbol names for each * val = which value is active; must be in [0,length-1] */ this (char[] symbol, char[][] enumSymbols, int val = 0) { this.enumSymbols = enumSymbols; enums.length = enumSymbols.length; char[] symPeriod = symbol~'.'; foreach (i, ref e; enums) { e = new EnumValueContent (this, i, symPeriod~enumSymbols[i]); } super (symbol, val); // calls assignNoCb } /** Create from a EnumCStruct. */ this (char[] symbol, EnumCStruct data) { this (symbol, data.symbols, data.value); } /** Return an EnumCStruct, which could be used to recreate this Content. */ //NOTE: save EnumCStruct directly? EnumCStruct structOf () { EnumCStruct r; r.symbols = enumSymbols; r.value = v; return r; } override void assignNoCb (int val) { // called by children (via opAssign) if (val >= enums.length || val < 0) { logger.error ("EnumContent "~name_~" assigned invalid value; keeping value: "~sv); return; } enums[v] .assignFromParent (false); enums[val].assignFromParent (true); v = val; sv = enums[v].name_; if (pos > sv.length) pos = sv.length; endEvent; } // Change if true, assert current value if false void childAssign (int val) { debug assert (0 <= val && val < enums.length, "cA out of bounds"); if (enums[val].v) assignNoCb (val); else enums[val].assignFromParent (v == val); } override char[] endEdit () { foreach (i,e; enums) if (sv == e.name_) { v = i; goto break1; } sv = enums[v].name_; // sv was edited; revert logger.error ("EnumContent "~name_~" assigned invalid value; keeping value: "~sv); if (pos > sv.length) pos = sv.length; break1: endEvent; return sv; } override Content[] list () { return enums; } struct EnumCStruct { char[][] symbols; int value; } protected: EnumValueContent[] enums; char[][] enumSymbols; // saved for getStructOf /** Special version of BoolContent for each enumeration to update the parent Enum. */ private class EnumValueContent : BoolContent { /** New enumeration of parent with index num. */ this (EnumContent parent, size_t num, char[] symbol) { this.parent = parent; i = num; super (symbol, 0); // parent sets value (if true); we shouldn't sv = "false"; // except for this } override void assignNoCb (bool val) { v = val; parent.childAssign (i); } void assignFromParent (bool val) { // don't call back to parent super.assignNoCb (val); endEvent; } override char[] endEdit () { v = sv && (sv[0] == 't' || sv[0] == 'T' || sv[0] == '1'); parent.childAssign (i); return sv; } protected: EnumContent parent; size_t i; } }