lyx_mirror/src/frontends/WorkArea.cpp
Abdelrazak Younes af06ed5ff1 Transfer current_font and real_current_font from Text to Cursor.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@19999 a592a061-630c-0410-9148-cb99ea01b6c8
2007-09-02 13:35:48 +00:00

341 lines
7.3 KiB
C++

/**
* \file WorkArea.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
* \author Abdelrazak Younes
*
* Full author contact details are available in file CREDITS.
*
* Splash screen code added by Angus Leeming
*/
#include <config.h>
#include "frontends/WorkArea.h"
#include "frontends/Application.h"
#include "frontends/FontMetrics.h"
#include "frontends/LyXView.h"
#include "BufferView.h"
#include "Buffer.h"
#include "BufferParams.h"
#include "Color.h"
#include "CoordCache.h"
#include "Cursor.h"
#include "debug.h"
#include "Font.h"
#include "FuncRequest.h"
#include "Language.h"
#include "LyXFunc.h"
#include "LyXRC.h"
#include "MetricsInfo.h"
#include "gettext.h"
#include "support/ForkedcallsController.h"
#include "support/FileName.h"
#include <boost/utility.hpp>
#include <boost/bind.hpp>
#include <boost/current_function.hpp>
using lyx::support::ForkedcallsController;
using std::endl;
using std::min;
using std::max;
using std::string;
namespace {
// All the below connection objects are needed because of a bug in some
// versions of GCC (<=2.96 are on the suspects list.) By having and assigning
// to these connections we avoid a segfault upon startup, and also at exit.
// (Lgb)
boost::signals::connection timecon;
} // anon namespace
namespace lyx {
namespace frontend {
WorkArea::WorkArea(Buffer & buffer, LyXView & lv)
: buffer_view_(new BufferView(buffer)), lyx_view_(&lv),
cursor_visible_(false), cursor_timeout_(400)
{
// Setup the signals
timecon = cursor_timeout_.timeout
.connect(boost::bind(&WorkArea::toggleCursor, this));
bufferChangedConnection_ =
buffer.changed.connect(
boost::bind(&WorkArea::redraw, this));
bufferClosingConnection_ =
buffer.closing.connect(
boost::bind(&WorkArea::close, this));
cursor_timeout_.start();
}
WorkArea::~WorkArea()
{
bufferChangedConnection_.disconnect();
bufferClosingConnection_.disconnect();
delete buffer_view_;
}
void WorkArea::close()
{
lyx_view_->removeWorkArea(this);
}
//void WorkArea::setLyXView(LyXView * lyx_view)
//{
// lyx_view_ = lyx_view;
//}
BufferView & WorkArea::bufferView()
{
return *buffer_view_;
}
BufferView const & WorkArea::bufferView() const
{
return *buffer_view_;
}
void WorkArea::stopBlinkingCursor()
{
cursor_timeout_.stop();
hideCursor();
}
void WorkArea::startBlinkingCursor()
{
showCursor();
cursor_timeout_.restart();
}
void WorkArea::redraw()
{
if (!isVisible())
// No need to redraw in this case.
return;
// No need to do anything if this is the current view. The BufferView
// metrics are already up to date.
if (lyx_view_ != theApp()->currentView()) {
// FIXME: it would be nice to optimize for the off-screen case.
buffer_view_->updateMetrics(false);
buffer_view_->cursor().fixIfBroken();
}
updateScrollbar();
// update cursor position, because otherwise it has to wait until
// the blinking interval is over
if (cursor_visible_) {
hideCursor();
showCursor();
}
ViewMetricsInfo const & vi = buffer_view_->viewMetricsInfo();
LYXERR(Debug::WORKAREA) << "WorkArea::redraw screen" << endl;
int const ymin = std::max(vi.y1, 0);
int const ymax = vi.p2 < vi.size - 1 ? vi.y2 : height();
expose(0, ymin, width(), ymax - ymin);
//LYXERR(Debug::WORKAREA)
//<< " ymin = " << ymin << " width() = " << width()
// << " ymax-ymin = " << ymax-ymin << std::endl;
if (lyxerr.debugging(Debug::WORKAREA))
buffer_view_->coordCache().dump();
}
void WorkArea::processKeySym(KeySymbolPtr key, key_modifier::state state)
{
// In order to avoid bad surprise in the middle of an operation, we better stop
// the blinking cursor.
stopBlinkingCursor();
theLyXFunc().setLyXView(lyx_view_);
theLyXFunc().processKeySym(key, state);
}
void WorkArea::dispatch(FuncRequest const & cmd0, key_modifier::state k)
{
// Handle drag&drop
if (cmd0.action == LFUN_FILE_OPEN) {
lyx_view_->dispatch(cmd0);
return;
}
theLyXFunc().setLyXView(lyx_view_);
FuncRequest cmd;
if (cmd0.action == LFUN_MOUSE_PRESS) {
if (k == key_modifier::shift)
cmd = FuncRequest(cmd0, "region-select");
else if (k == key_modifier::ctrl)
cmd = FuncRequest(cmd0, "paragraph-select");
else
cmd = cmd0;
}
else
cmd = cmd0;
// In order to avoid bad surprise in the middle of an operation, we better stop
// the blinking cursor.
if (!(cmd.action == LFUN_MOUSE_MOTION
&& cmd.button() == mouse_button::none))
stopBlinkingCursor();
bool const needRedraw = buffer_view_->workAreaDispatch(cmd);
if (needRedraw)
buffer_view_->buffer().changed();
// Skip these when selecting
if (cmd.action != LFUN_MOUSE_MOTION) {
lyx_view_->updateLayoutChoice();
lyx_view_->updateToolbars();
}
// GUI tweaks except with mouse motion with no button pressed.
if (!(cmd.action == LFUN_MOUSE_MOTION
&& cmd.button() == mouse_button::none)) {
// Slight hack: this is only called currently when we
// clicked somewhere, so we force through the display
// of the new status here.
lyx_view_->clearMessage();
// Show the cursor immediately after any operation.
startBlinkingCursor();
}
}
void WorkArea::resizeBufferView()
{
// WARNING: Please don't put any code that will trigger a repaint here!
// We are already inside a paint event.
lyx_view_->busy(true);
buffer_view_->resize(width(), height());
lyx_view_->updateLayoutChoice();
lyx_view_->busy(false);
}
void WorkArea::updateScrollbar()
{
buffer_view_->updateScrollbar();
ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
setScrollbarParams(scroll_.height, scroll_.position,
scroll_.lineScrollHeight);
}
void WorkArea::scrollBufferView(int position)
{
stopBlinkingCursor();
buffer_view_->scrollDocView(position);
redraw();
if (lyxrc.cursor_follows_scrollbar) {
buffer_view_->setCursorFromScrollbar();
lyx_view_->updateLayoutChoice();
}
// Show the cursor immediately after any operation.
startBlinkingCursor();
}
void WorkArea::showCursor()
{
if (cursor_visible_)
return;
CursorShape shape = BAR_SHAPE;
Font const & realfont = buffer_view_->cursor().real_current_font;
BufferParams const & bp = buffer_view_->buffer().params();
bool const samelang = realfont.language() == bp.language;
bool const isrtl = realfont.isVisibleRightToLeft();
if (!samelang || isrtl != bp.language->rightToLeft()) {
shape = L_SHAPE;
if (isrtl)
shape = REVERSED_L_SHAPE;
}
// The ERT language hack needs fixing up
if (realfont.language() == latex_language)
shape = BAR_SHAPE;
Font const font = buffer_view_->cursor().getFont();
FontMetrics const & fm = theFontMetrics(font);
int const asc = fm.maxAscent();
int const des = fm.maxDescent();
int h = asc + des;
int x = 0;
int y = 0;
buffer_view_->cursor().getPos(x, y);
y -= asc;
// if it doesn't touch the screen, don't try to show it
if (y + h < 0 || y >= height())
return;
cursor_visible_ = true;
showCursor(x, y, h, shape);
}
void WorkArea::hideCursor()
{
if (!cursor_visible_)
return;
cursor_visible_ = false;
removeCursor();
}
void WorkArea::toggleCursor()
{
if (cursor_visible_)
hideCursor();
else
showCursor();
// Use this opportunity to deal with any child processes that
// have finished but are waiting to communicate this fact
// to the rest of LyX.
ForkedcallsController & fcc = ForkedcallsController::get();
fcc.handleCompletedProcesses();
cursor_timeout_.restart();
}
} // namespace frontend
} // namespace lyx