2 * \file InsetPreview.cpp
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3 * This file is part of LyX, the document processor.
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4 * Licence details can be found in the file COPYING.
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6 * \author Vincent van Ravesteijn
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8 * Full author contact details are available in file CREDITS.
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12 #include "InsetPreview.h"
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15 #include "BufferParams.h"
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16 #include "BufferView.h"
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20 #include "MetricsInfo.h"
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21 #include "OutputParams.h"
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22 #include "RenderPreview.h"
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24 #include "frontends/Painter.h"
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26 #include "graphics/PreviewImage.h"
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30 using namespace std;
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35 InsetPreview::InsetPreview(Buffer * buf)
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37 preview_(new RenderPreview(this)), use_preview_(true)
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39 setAutoBreakRows(true);
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41 setFrameColor(Color_previewframe);
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45 InsetPreview::~InsetPreview()
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49 InsetPreview::InsetPreview(InsetPreview const & other)
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52 preview_.reset(new RenderPreview(*other.preview_, this));
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56 void InsetPreview::write(ostream & os) const
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58 os << "Preview" << "\n";
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63 void InsetPreview::addPreview(DocIterator const & inset_pos,
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64 graphics::PreviewLoader &) const
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66 preparePreview(inset_pos);
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70 void InsetPreview::preparePreview(DocIterator const & pos) const
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72 odocstringstream str;
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73 OutputParams runparams(&pos.buffer()->params().encoding());
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74 latex(str, runparams);
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75 docstring const snippet = str.str();
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76 preview_->addPreview(snippet, *pos.buffer());
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80 bool InsetPreview::previewState(BufferView * bv) const
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82 if (!editing(bv) && (RenderPreview::status() == LyXRC::PREVIEW_ON ||
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83 RenderPreview::status() == LyXRC::PREVIEW_NO_MATH)) {
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84 graphics::PreviewImage const * pimage =
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85 preview_->getPreviewImage(bv->buffer());
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86 return pimage && pimage->image();
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92 void InsetPreview::reloadPreview(DocIterator const & pos) const
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94 preparePreview(pos);
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95 preview_->startLoading(*pos.buffer());
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99 void InsetPreview::draw(PainterInfo & pi, int x, int y) const
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101 use_preview_ = previewState(pi.base.bv);
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103 if (use_preview_) {
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104 // one pixel gap in front
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105 preview_->draw(pi, x + 1 + TEXT_TO_INSET_OFFSET, y);
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106 setPosCache(pi, x, y);
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109 InsetText::draw(pi, x, y);
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113 void InsetPreview::edit(Cursor & cur, bool front, EntryDirection entry_from)
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116 InsetText::edit(cur, front, entry_from);
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120 Inset * InsetPreview::editXY(Cursor & cur, int x, int y)
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122 if (use_preview_) {
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123 edit(cur, true, ENTRY_DIRECTION_IGNORE);
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127 return InsetText::editXY(cur, x, y);
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131 void InsetPreview::metrics(MetricsInfo & mi, Dimension & dim) const
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133 if (previewState(mi.base.bv)) {
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134 preview_->metrics(mi, dim);
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135 mi.base.textwidth += 2 * TEXT_TO_INSET_OFFSET;
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137 dim.wid = max(dim.wid, 4);
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138 dim.asc = max(dim.asc, 4);
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140 dim.asc += TEXT_TO_INSET_OFFSET;
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141 dim.des += TEXT_TO_INSET_OFFSET;
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142 dim.wid += TEXT_TO_INSET_OFFSET;
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144 dim.wid += TEXT_TO_INSET_OFFSET;
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145 // insert a one pixel gap
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147 // Cache the inset dimension.
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148 setDimCache(mi, dim);
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149 Dimension dim_dummy;
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150 MetricsInfo mi_dummy = mi;
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151 InsetText::metrics(mi_dummy, dim_dummy);
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154 InsetText::metrics(mi, dim);
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158 bool InsetPreview::notifyCursorLeaves(Cursor const & old, Cursor & cur)
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160 reloadPreview(old);
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161 cur.screenUpdateFlags(Update::Force);
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162 return InsetText::notifyCursorLeaves(old, cur);
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