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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef SCI_GRAPHICS_CONTROLS32_H
#define SCI_GRAPHICS_CONTROLS32_H
#include "sci/graphics/text32.h"
namespace Sci {
class GfxCache;
class GfxScreen;
class GfxText32;
struct TextEditor {
/**
* The bitmap where the editor is rendered.
*/
reg_t bitmap;
/**
* The width of the editor, in bitmap pixels.
*/
int16 width;
/**
* The text in the editor.
*/
Common::String text;
/**
* The rect where text should be drawn into the editor,
* in bitmap pixels.
*/
Common::Rect textRect;
/**
* The color of the border. -1 indicates no border.
*/
int16 borderColor;
/**
* The text color.
*/
uint8 foreColor;
/**
* The background color.
*/
uint8 backColor;
/**
* The transparent color.
*/
uint8 skipColor;
/**
* The font used to render the text in the editor.
*/
GuiResourceId fontId;
/**
* The current position of the cursor within the editor.
*/
uint16 cursorCharPosition;
/**
* Whether or not the cursor is currently drawn to the
* screen.
*/
bool cursorIsDrawn;
/**
* The rectangle for drawing the input cursor, in bitmap
* pixels.
*/
Common::Rect cursorRect;
/**
* The maximum allowed text length, in characters.
*/
uint16 maxLength;
};
/**
* A single block of text written to a ScrollWindow.
*/
struct ScrollWindowEntry {
/**
* ID of the line. In SSCI this was actually a memory
* handle for the string of this line. We use a simple
* numeric ID instead.
*/
reg_t id;
/**
* The alignment to use when rendering this line of
* text. If -1, the default alignment from the
* corresponding ScrollWindow will be used.
*/
TextAlign alignment;
/**
* The color to use to render this line of text. If -1,
* the default foreground color from the corresponding
* ScrollWindow will be used.
*/
int16 foreColor;
/**
* The font to use to render this line of text. If -1,
* the default font from the corresponding ScrollWindow
* will be used.
*/
GuiResourceId fontId;
/**
* The text.
*/
Common::String text;
};
class ScreenItem;
/**
* A scrollable text window.
*/
class ScrollWindow {
public:
ScrollWindow(SegManager *segMan, const Common::Rect &gameRect, const Common::Point &position, const reg_t planeObj, const uint8 defaultForeColor, const uint8 defaultBackColor, const GuiResourceId defaultFontId, const TextAlign defaultAlignment, const int16 defaultBorderColor, const uint16 maxNumEntries);
~ScrollWindow();
/**
* Adds a new text entry to the window. If `fontId`,
* `foreColor`, or `alignment` are `-1`, the
* ScrollWindow's default values will be used.
*/
reg_t add(const Common::String &text, const GuiResourceId fontId, const int16 foreColor, const TextAlign alignment, const bool scrollTo);
/**
* Modifies an existing text entry with the given ID. If
* `fontId`, `foreColor`, or `alignment` are `-1`, the
* ScrollWindow's default values will be used.
*/
reg_t modify(const reg_t id, const Common::String &text, const GuiResourceId fontId, const int16 foreColor, const TextAlign alignment, const bool scrollTo);
/**
* Shows the ScrollWindow if it is not already visible.
*/
void show();
/**
* Hides the ScrollWindow if it is currently visible.
*/
void hide();
/**
* Gets the number of lines that the content of a
* ScrollWindow is scrolled upward, as a ratio of the
* total number of lines of content.
*/
Ratio where() const;
/**
* Scrolls the window to a specific location.
*/
void go(const Ratio location);
/**
* Scrolls the window to the top.
*/
void home();
/**
* Scrolls the window to the bottom.
*/
void end();
/**
* Scrolls the window up one line.
*/
void upArrow();
/**
* Scrolls the window down one line.
*/
void downArrow();
/**
* Scrolls the window up by one page.
*/
void pageUp();
/**
* Scrolls the window down by one page.
*/
void pageDown();
/**
* Gets a reference to the in-memory bitmap that
* is used to render the text in the ScrollWindow.
*/
const reg_t getBitmap() const { return _bitmap; }
private:
typedef Common::Array<ScrollWindowEntry> EntriesList;
/**
* A convenience function that fills a
* ScrollWindowEntry's properties.
*/
void fillEntry(ScrollWindowEntry &entry, const Common::String &text, const GuiResourceId fontId, const int16 foreColor, const TextAlign alignment);
/**
* Rescans the entire text of the ScrollWindow when an
* entry is added or modified, calculating the character
* offsets of all line endings, the total number of
* lines of text, the height of the viewport (in lines
* of text), the last character visible in the viewport
* (assuming the viewport is scrolled to the top), and
* the line index of the bottommost visible line
* (assuming the viewport is scrolled to the top).
*/
void computeLineIndices();
/**
* Calculates which text is visible within the
* ScrollWindow's viewport and renders the text to the
* internal bitmap.
*
* If `doFrameOut` is true, the screen will be refreshed
* immediately instead of waiting for the next call to
* `kFrameOut`.
*/
void update(const bool doFrameOut);
/**
* The text renderer.
*/
GfxText32 _gfxText32;
/**
* The individual text entries added to the
* ScrollWindow.
*/
EntriesList _entries;
/**
* The maximum number of entries allowed. Once this
* limit is reached, the oldest entry will be removed
* when a new entry is added.
*/
uint _maxNumEntries;
/**
* A mapping from a line index to the line's character
* offset in `_text`.
*/
Common::Array<int> _startsOfLines;
/**
* All text added to the window.
*/
Common::String _text;
/**
* Text that is within the viewport of the ScrollWindow.
*/
Common::String _visibleText;
/**
* The offset of the first visible character in `_text`.
*/
int _firstVisibleChar;
/**
* The index of the line that is at the top of the
* viewport.
*/
int _topVisibleLine;
/**
* The index of the last visible character in `_text`,
* or -1 if there is no text.
*/
int _lastVisibleChar;
/**
* The index of the line that is at the bottom of the
* viewport, or -1 if there is no text.
*/
int _bottomVisibleLine;
/**
* The total number of lines in the backbuffer. This
* number may be higher than the total number of entries
* if an entry contains newlines.
*/
int _numLines;
/**
* The number of lines that are currently visible in the
* text area of the window.
*/
int _numVisibleLines;
/**
* The plane in which the ScrollWindow should be
* rendered.
*/
reg_t _plane;
/**
* The default text color.
*/
uint8 _foreColor;
/**
* The default background color of the text bitmap.
*/
uint8 _backColor;
/**
* The default border color of the text bitmap. If -1,
* the viewport will have no border.
*/
int16 _borderColor;
/**
* The default font used for rendering text into the
* ScrollWindow.
*/
GuiResourceId _fontId;
/**
* The default text alignment used for rendering text
* into the ScrollWindow.
*/
TextAlign _alignment;
/**
* The visibility of the ScrollWindow.
*/
bool _visible;
/**
* The dimensions of the text box inside the font
* bitmap, in text-system coordinates.
*/
Common::Rect _textRect;
/**
* The top-left corner of the ScrollWindow's screen
* item, in game script coordinates, relative to the
* parent plane.
*/
Common::Point _position;
/**
* The height of the default font in screen pixels. All
* fonts rendered into the ScrollWindow must have this
* same height.
*/
uint8 _pointSize;
/**
* The bitmap used to render text.
*/
reg_t _bitmap;
/**
* A monotonically increasing ID used to identify
* text entries added to the ScrollWindow.
*/
uint16 _nextEntryId;
/**
* The ScrollWindow's screen item.
*/
ScreenItem *_screenItem;
};
/**
* Controls class, handles drawing of controls in SCI32 (SCI2, SCI2.1, SCI3) games
*/
class GfxControls32 {
public:
GfxControls32(SegManager *segMan, GfxCache *cache, GfxText32 *text);
~GfxControls32();
private:
SegManager *_segMan;
GfxCache *_gfxCache;
GfxText32 *_gfxText32;
#pragma mark -
#pragma mark Garbage collection
public:
Common::Array<reg_t> listObjectReferences();
#pragma mark -
#pragma mark Text input control
public:
reg_t kernelEditText(const reg_t controlObject);
private:
/**
* If true, typing will overwrite text that already
* exists at the text cursor's current position.
*/
bool _overwriteMode;
/**
* The tick at which the text cursor should be toggled
* by `flashCursor`.
*/
uint32 _nextCursorFlashTick;
/**
* Draws the text cursor for the given editor.
*/
void drawCursor(TextEditor &editor);
/**
* Erases the text cursor for the given editor.
*/
void eraseCursor(TextEditor &editor);
/**
* Toggles the text cursor for the given editor to be
* either drawn or erased.
*/
void flashCursor(TextEditor &editor);
#pragma mark -
#pragma mark Scrollable window control
public:
/**
* Creates a new scrollable window and returns the ID
* for the new window, which is used by game scripts to
* interact with scrollable windows.
*/
reg_t makeScrollWindow(const Common::Rect &gameRect, const Common::Point &position, const reg_t plane, const uint8 defaultForeColor, const uint8 defaultBackColor, const GuiResourceId defaultFontId, const TextAlign defaultAlignment, const int16 defaultBorderColor, const uint16 maxNumEntries);
/**
* Gets a registered ScrollWindow instance by ID.
*/
ScrollWindow *getScrollWindow(const reg_t id);
/**
* Destroys the scroll window with the given ID.
*/
void destroyScrollWindow(const reg_t id);
private:
typedef Common::HashMap<uint16, ScrollWindow *> ScrollWindowMap;
/**
* Monotonically increasing ID used to identify
* ScrollWindow instances.
*/
uint16 _nextScrollWindowId;
/**
* A lookup table for registered ScrollWindow instances.
*/
ScrollWindowMap _scrollWindows;
};
} // End of namespace Sci
#endif
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