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https://git.lyx.org/repos/lyx.git
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8aff4a1530
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@7272 a592a061-630c-0410-9148-cb99ea01b6c8
511 lines
12 KiB
C
511 lines
12 KiB
C
/**
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* \file screen.C
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author John Levon
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*
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* Full author contact details are available in file CREDITS
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*
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* Splash screen code added by Angus Leeming
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*/
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#include <config.h>
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#include "screen.h"
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#include "lyxtext.h"
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#include "lyxrc.h"
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#include "lyxrow.h"
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#include "BufferView.h"
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#include "buffer.h"
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#include "WorkArea.h"
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#include "Painter.h"
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#include "font_metrics.h"
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#include "language.h"
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#include "debug.h"
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#include "rowpainter.h"
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#include "insets/updatableinset.h"
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#include "mathed/formulabase.h"
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#include "lyx_gui.h"
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// Splash screen-specific stuff
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#include "lyxfont.h"
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#include "version.h"
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#include "graphics/GraphicsLoader.h"
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#include "graphics/GraphicsImage.h"
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#include "support/filetools.h" // LibFileSearch
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#include <boost/utility.hpp>
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#include <boost/bind.hpp>
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#include <boost/signals/trackable.hpp>
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using namespace lyx::support;
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using std::min;
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using std::max;
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using std::endl;
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namespace grfx = lyx::graphics;
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namespace {
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class SplashScreen : boost::noncopyable, boost::signals::trackable {
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public:
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/// This is a singleton class. Get the instance.
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static SplashScreen const & get();
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///
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grfx::Image const * image() const { return loader_.image(); }
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///
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string const & text() const { return text_; }
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///
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LyXFont const & font() const { return font_; }
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///
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void connect(grfx::Loader::slot_type const & slot) const {
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loader_.connect(slot);
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}
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///
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void startLoading() const {
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if (loader_.status() == grfx::WaitingToLoad)
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loader_.startLoading();
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}
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private:
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/** Make the c-tor private so we can control how many objects
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* are instantiated.
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*/
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SplashScreen();
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///
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grfx::Loader loader_;
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/// The text to be written on top of the pixmap
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string const text_;
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/// in this font...
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LyXFont font_;
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};
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SplashScreen const & SplashScreen::get()
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{
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static SplashScreen singleton;
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return singleton;
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}
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SplashScreen::SplashScreen()
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: text_(lyx_version ? lyx_version : "unknown")
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{
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if (!lyxrc.show_banner)
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return;
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string const file = LibFileSearch("images", "banner", "ppm");
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if (file.empty())
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return;
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// The font used to display the version info
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font_.setFamily(LyXFont::SANS_FAMILY);
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font_.setSeries(LyXFont::BOLD_SERIES);
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font_.setSize(LyXFont::SIZE_NORMAL);
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font_.setColor(LColor::yellow);
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// Load up the graphics file
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loader_.reset(file);
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}
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} // namespace anon
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LyXScreen::LyXScreen()
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: cursor_visible_(false), greyed_out_(true)
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{
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// Start loading the pixmap as soon as possible
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if (lyxrc.show_banner) {
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SplashScreen const & splash = SplashScreen::get();
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splash.connect(boost::bind(&LyXScreen::greyOut, this));
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splash.startLoading();
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}
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}
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LyXScreen::~LyXScreen()
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{
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}
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void LyXScreen::showCursor(BufferView & bv)
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{
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// this is needed to make sure we copy back the right
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// pixmap on the hide for the Qt frontend
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lyx_gui::sync_events();
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if (cursor_visible_)
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return;
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if (!bv.available())
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return;
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Cursor_Shape shape = BAR_SHAPE;
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LyXText const & text = *bv.getLyXText();
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LyXFont const & realfont(text.real_current_font);
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BufferParams const & bp(bv.buffer()->params);
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bool const samelang = realfont.language() == bp.language;
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bool const isrtl = realfont.isVisibleRightToLeft();
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if (!samelang || isrtl != bp.language->RightToLeft()) {
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shape = L_SHAPE;
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if (isrtl)
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shape = REVERSED_L_SHAPE;
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}
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int ascent = font_metrics::maxAscent(realfont);
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int descent = font_metrics::maxDescent(realfont);
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int h = ascent + descent;
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int x = 0;
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int y = 0;
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int const top_y = bv.text->top_y();
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if (bv.theLockingInset()) {
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// Would be nice to clean this up to make some understandable sense...
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UpdatableInset * inset = bv.theLockingInset();
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inset->getCursor(bv, x, y);
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// Non-obvious. The reason we have to have these
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// extra checks is that the ->getCursor() calls rely
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// on the inset's own knowledge of its screen position.
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// If we scroll up or down in a big enough increment, the
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// inset->draw() is not called: this doesn't update
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// inset.top_baseline, so getCursor() returns an old value.
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// Ugly as you like.
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int bx, by;
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inset->getCursorPos(&bv, bx, by);
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by += inset->insetInInsetY() + bv.text->cursor.iy();
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if (by < top_y)
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return;
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if (by > top_y + workarea().workHeight())
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return;
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} else {
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x = bv.text->cursor.x();
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y = bv.text->cursor.y();
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y -= top_y;
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}
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y -= ascent;
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// if it doesn't fit entirely on the screen, don't try to show it
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if (y < 0 || y + h > workarea().workHeight())
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return;
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cursor_visible_ = true;
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showCursor(x, y, h, shape);
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}
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void LyXScreen::hideCursor()
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{
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if (!cursor_visible_)
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return;
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cursor_visible_ = false;
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removeCursor();
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}
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void LyXScreen::toggleCursor(BufferView & bv)
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{
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if (cursor_visible_)
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hideCursor();
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else
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showCursor(bv);
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}
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bool LyXScreen::fitManualCursor(BufferView * bv, LyXText * text,
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int /*x*/, int y, int asc, int desc)
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{
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int const vheight = workarea().workHeight();
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int newtop = text->top_y();
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if (y + desc - text->top_y() >= vheight)
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newtop = y - 3 * vheight / 4; // the scroll region must be so big!!
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else if (y - asc < text->top_y()
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&& text->top_y() > 0) {
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newtop = y - vheight / 4;
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}
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newtop = max(newtop, 0); // can newtop ever be < 0? (Lgb)
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if (newtop != text->top_y()) {
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draw(text, bv, newtop);
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text->top_y(newtop);
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return true;
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}
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return false;
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}
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unsigned int LyXScreen::topCursorVisible(LyXText * text)
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{
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LyXCursor const & cursor = text->cursor;
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int top_y = text->top_y();
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int newtop = top_y;
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int const vheight = workarea().workHeight();
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RowList::iterator row = text->cursorRow();
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#warning SUPER HACK DISABLED (Lgb)
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#if 0
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// Is this a hack? Yes, probably... (Lgb)
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if (!row)
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return max(newtop, 0);
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#endif
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if (cursor.y() - row->baseline() + row->height() - top_y >= vheight) {
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if (row->height() < vheight
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&& row->height() > vheight / 4) {
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newtop = cursor.y()
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+ row->height()
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- row->baseline() - vheight;
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} else {
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// scroll down, the scroll region must be so big!!
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newtop = cursor.y() - vheight / 2;
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}
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} else if (static_cast<int>((cursor.y()) - row->baseline()) <
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top_y && top_y > 0) {
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if (row->height() < vheight
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&& row->height() > vheight / 4) {
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newtop = cursor.y() - row->baseline();
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} else {
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// scroll up
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newtop = cursor.y() - vheight / 2;
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newtop = min(newtop, top_y);
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}
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}
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newtop = max(newtop, 0);
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return newtop;
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}
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bool LyXScreen::fitCursor(LyXText * text, BufferView * bv)
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{
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// Is a change necessary?
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int const newtop = topCursorVisible(text);
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bool const result = (newtop != text->top_y());
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if (result) {
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draw(text, bv, newtop);
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}
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return result;
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}
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void LyXScreen::update(BufferView & bv, int yo, int xo)
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{
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int const vwidth = workarea().workWidth();
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int const vheight = workarea().workHeight();
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LyXText * text = bv.text;
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workarea().getPainter().start();
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switch (text->refreshStatus()) {
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case LyXText::REFRESH_AREA:
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{
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text->updateRowPositions();
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int const y = max(int(text->refresh_y - text->top_y()), 0);
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drawFromTo(text, &bv, y, vheight, yo, xo);
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expose(0, y, vwidth, vheight - y);
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}
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break;
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case LyXText::REFRESH_ROW:
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{
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text->updateRowPositions();
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// ok I will update the current cursor row
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drawOneRow(text, &bv, text->refresh_row, text->refresh_y,
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yo, xo);
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// this because if we had a major update the refresh_row could
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// have been set to 0!
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if (text->refresh_row != text->rows().end()) {
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expose(0, text->refresh_y - text->top_y() + yo,
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vwidth, text->refresh_row->height());
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}
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}
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break;
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case LyXText::REFRESH_NONE:
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// Nothing needs done
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break;
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}
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workarea().getPainter().end();
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}
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void LyXScreen::toggleSelection(LyXText * text, BufferView * bv,
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bool kill_selection,
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int yo, int xo)
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{
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// only if there is a selection
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if (!text->selection.set()) return;
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int const bottom = min(
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max(static_cast<int>(text->selection.end.y()
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- text->getRow(text->selection.end)->baseline()
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+ text->getRow(text->selection.end)->height()),
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text->top_y()),
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static_cast<int>(text->top_y() + workarea().workHeight()));
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int const top = min(
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max(static_cast<int>(text->selection.start.y() -
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text->getRow(text->selection.start)->baseline()),
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text->top_y()),
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static_cast<int>(text->top_y() + workarea().workHeight()));
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if (kill_selection)
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text->selection.set(false);
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workarea().getPainter().start();
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drawFromTo(text, bv, top - text->top_y(), bottom - text->top_y(),
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yo, xo);
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expose(0, top - text->top_y(),
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workarea().workWidth(),
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bottom - text->top_y() - (top - text->top_y()));
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workarea().getPainter().end();
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}
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void LyXScreen::toggleToggle(LyXText * text, BufferView * bv,
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int yo, int xo)
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{
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if (text->toggle_cursor.par() == text->toggle_end_cursor.par()
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&& text->toggle_cursor.pos() == text->toggle_end_cursor.pos())
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return;
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int const top_tmp = text->toggle_cursor.y()
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- text->getRow(text->toggle_cursor)->baseline();
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int const bottom_tmp = text->toggle_end_cursor.y()
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- text->getRow(text->toggle_end_cursor)->baseline()
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+ text->getRow(text->toggle_end_cursor)->height();
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int const offset = yo < 0 ? yo : 0;
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int const bottom = min(max(bottom_tmp, text->top_y()),
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static_cast<int>(text->top_y() + workarea().workHeight())) - offset;
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int const top = min(max(top_tmp, text->top_y()),
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static_cast<int>(text->top_y() + workarea().workHeight())) - offset;
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workarea().getPainter().start();
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drawFromTo(text, bv, top - text->top_y(), bottom - text->top_y(), yo, xo);
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expose(0, top - text->top_y(), workarea().workWidth(),
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bottom - text->top_y() - (top - text->top_y()));
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workarea().getPainter().end();
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}
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void LyXScreen::redraw(LyXText * text, BufferView * bv)
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{
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greyed_out_ = !text;
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if (greyed_out_) {
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greyOut();
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return;
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}
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workarea().getPainter().start();
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text->updateRowPositions();
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drawFromTo(text, bv, 0, workarea().workHeight(), 0, 0);
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expose(0, 0, workarea().workWidth(), workarea().workHeight());
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workarea().getPainter().end();
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}
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void LyXScreen::greyOut()
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{
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if (!greyed_out_)
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return;
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workarea().getPainter().start();
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workarea().getPainter().fillRectangle(0, 0,
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workarea().workWidth(),
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workarea().workHeight(),
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LColor::bottomarea);
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// Add a splash screen to the centre of the work area
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SplashScreen const & splash = SplashScreen::get();
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grfx::Image const * const splash_image = splash.image();
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if (splash_image) {
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int const w = splash_image->getWidth();
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int const h = splash_image->getHeight();
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int x = (workarea().workWidth() - w) / 2;
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int y = (workarea().workHeight() - h) / 2;
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workarea().getPainter().image(x, y, w, h, *splash_image);
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string const & splash_text = splash.text();
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LyXFont const & splash_font = splash.font();
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x += 260;
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y += 265;
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workarea().getPainter().text(x, y, splash_text, splash_font);
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}
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expose(0, 0, workarea().workWidth(), workarea().workHeight());
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workarea().getPainter().end();
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}
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void LyXScreen::drawFromTo(LyXText * text, BufferView * bv,
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int y1, int y2, int yo, int xo)
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{
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lyxerr[Debug::GUI] << "screen: drawFromTo " << y1 << '-' << y2 << endl;
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int const topy = text->top_y();
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int y_text = topy + y1;
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RowList::iterator rit = text->getRowNearY(y_text);
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int y = y_text - topy;
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// y1 is now the real beginning of row on the screen
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hideCursor();
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RowList::iterator const rend = text->rows().end();
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while (rit != rend && y < y2) {
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paintRows(*bv, *text, rit, y + yo, xo, y + topy);
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y += rit->height();
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++rit;
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}
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// maybe we have to clear the screen at the bottom
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if ((y < y2) && !text->isInInset()) {
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workarea().getPainter().fillRectangle(0, y,
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workarea().workWidth(), y2 - y,
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LColor::bottomarea);
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}
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}
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void LyXScreen::drawOneRow(LyXText * text, BufferView * bv,
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RowList::iterator row,
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int y_text, int yo, int xo)
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{
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int const y = y_text - text->top_y() + yo;
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if (y + row->height() <= 0)
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return;
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if (y - row->height() > workarea().workHeight())
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return;
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hideCursor();
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paintRows(*bv, *text, row, y, xo, y + text->top_y());
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}
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