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From 0ab1f29d4ce315b0fca260c0e0f3007024d00342 Mon Sep 17 00:00:00 2001
From: Marek Kasik <mkasik@redhat.com>
Date: Tue, 28 Jan 2014 15:13:24 +0100
Subject: [PATCH] TextOutputDev: Respect orientation when selecting words
Take rotation into account when visiting selection.
This doesn't fix all problems (there are still problems
on line and block levels).
https://bugs.freedesktop.org/show_bug.cgi?id=16619
---
poppler/TextOutputDev.cc | 193 ++++++++++++++++++++++++++++++++++++-----------
1 file changed, 150 insertions(+), 43 deletions(-)
diff --git a/poppler/TextOutputDev.cc b/poppler/TextOutputDev.cc
index 7c2ca78..e93908c 100644
--- a/poppler/TextOutputDev.cc
+++ b/poppler/TextOutputDev.cc
@@ -178,6 +178,12 @@
// (Or 1/tan(angle) for 90/270 degrees.)
#define diagonalThreshold 0.1
+// Returns whether x is between a and b or equal to a or b.
+// a and b don't need to be sorted.
+#define XBetweenAB(x,a,b) (!(((x) > (a) && (x) > (b)) || \
+ ((x) < (a) && (x) < (b))) ? \
+ true : false)
+
namespace {
inline bool isAscii7 (Unicode uchar) {
@@ -4411,11 +4417,37 @@ void TextSelectionSizer::visitLine (TextLine *line,
PDFRectangle *rect;
double x1, y1, x2, y2, margin;
- margin = (line->yMax - line->yMin) / 8;
- x1 = line->edge[edge_begin];
- y1 = line->yMin - margin;
- x2 = line->edge[edge_end];
- y2 = line->yMax + margin;
+ switch (line->rot) {
+ default:
+ case 0:
+ margin = (line->yMax - line->yMin) / 8;
+ x1 = line->edge[edge_begin];
+ x2 = line->edge[edge_end];
+ y1 = line->yMin - margin;
+ y2 = line->yMax + margin;
+ break;
+ case 1:
+ margin = (line->xMax - line->xMin) / 8;
+ x1 = line->xMin - margin;
+ x2 = line->xMax + margin;
+ y1 = line->edge[edge_begin];
+ y2 = line->edge[edge_end];
+ break;
+ case 2:
+ margin = (line->yMax - line->yMin) / 8;
+ x1 = line->edge[edge_end];
+ x2 = line->edge[edge_begin];
+ y1 = line->yMin - margin;
+ y2 = line->yMax + margin;
+ break;
+ case 3:
+ margin = (line->xMax - line->xMin) / 8;
+ x1 = line->xMin - margin;
+ x2 = line->xMax + margin;
+ y1 = line->edge[edge_end];
+ y2 = line->edge[edge_begin];
+ break;
+ }
rect = new PDFRectangle (floor (x1 * scale),
floor (y1 * scale),
@@ -4499,19 +4531,56 @@ void TextSelectionPainter::visitLine (TextLine *line,
{
double x1, y1, x2, y2, margin;
- margin = (line->yMax - line->yMin) / 8;
- x1 = floor (line->edge[edge_begin]);
- y1 = floor (line->yMin - margin);
- x2 = ceil (line->edge[edge_end]);
- y2 = ceil (line->yMax + margin);
+ switch (line->rot) {
+ default:
+ case 0:
+ margin = (line->yMax - line->yMin) / 8;
+ x1 = line->edge[edge_begin];
+ x2 = line->edge[edge_end];
+ y1 = line->yMin - margin;
+ y2 = line->yMax + margin;
+ break;
+ case 1:
+ margin = (line->xMax - line->xMin) / 8;
+ x1 = line->xMin - margin;
+ x2 = line->xMax + margin;
+ y1 = line->edge[edge_begin];
+ y2 = line->edge[edge_end];
+ break;
+ case 2:
+ margin = (line->yMax - line->yMin) / 8;
+ x1 = line->edge[edge_end];
+ x2 = line->edge[edge_begin];
+ y1 = line->yMin - margin;
+ y2 = line->yMax + margin;
+ break;
+ case 3:
+ margin = (line->xMax - line->xMin) / 8;
+ x1 = line->xMin - margin;
+ x2 = line->xMax + margin;
+ y1 = line->edge[edge_end];
+ y2 = line->edge[edge_begin];
+ break;
+ }
+
+ ctm.transform(x1, y1, &x1, &y1);
+ ctm.transform(x2, y2, &x2, &y2);
- ctm.transform(line->edge[edge_begin], line->yMin - margin, &x1, &y1);
- ctm.transform(line->edge[edge_end], line->yMax + margin, &x2, &y2);
+ if (x1 < x2) {
+ x1 = floor (x1);
+ x2 = ceil (x2);
+ } else {
+ x1 = ceil (x1);
+ x2 = floor (x2);
+ }
- x1 = floor (x1);
- y1 = floor (y1);
- x2 = ceil (x2);
- y2 = ceil (y2);
+ if (y1 < y2) {
+ y1 = floor (y1);
+ y2 = ceil (y2);
+ } else {
+ y1 = ceil (y1);
+ y2 = floor (y2);
+ }
ictm.transform(x1, y1, &x1, &y1);
ictm.transform(x2, y2, &x2, &y2);
@@ -4589,17 +4658,27 @@ void TextWord::visitSelection(TextSelectionVisitor *visitor,
SelectionStyle style)
{
int i, begin, end;
- double mid;
+ double mid, s1, s2;
+
+ if (rot == 0 || rot == 2) {
+ s1 = selection->x1;
+ s2 = selection->x2;
+ } else {
+ s1 = selection->y1;
+ s2 = selection->y2;
+ }
begin = len;
end = 0;
for (i = 0; i < len; i++) {
mid = (edge[i] + edge[i + 1]) / 2;
- if (selection->x1 < mid || selection->x2 < mid)
- if (i < begin)
- begin = i;
- if (mid < selection->x1 || mid < selection->x2)
- end = i + 1;
+ if (XBetweenAB (mid, s1, s2))
+ {
+ if (i < begin)
+ begin = i;
+
+ end = i + 1;
+ }
}
/* Skip empty selection. */
@@ -4615,30 +4694,41 @@ void TextLine::visitSelection(TextSelectionVisitor *visitor,
TextWord *p, *begin, *end, *current;
int i, edge_begin, edge_end;
PDFRectangle child_selection;
+ double s1, s2, p_min, p_max;
+
+ if (rot == 0 || rot == 2) {
+ s1 = selection->x1;
+ s2 = selection->x2;
+ } else {
+ s1 = selection->y1;
+ s2 = selection->y2;
+ }
begin = nullptr;
end = nullptr;
current = nullptr;
for (p = words; p != nullptr; p = p->next) {
+ if (rot == 0 || rot == 2) {
+ p_min = p->xMin;
+ p_max = p->xMax;
+ } else {
+ p_min = p->yMin;
+ p_max = p->yMax;
+ }
+
if (blk->page->primaryLR) {
- if ((selection->x1 < p->xMax) ||
- (selection->x2 < p->xMax))
- if (begin == nullptr)
- begin = p;
+ if (((s1 < p_max) || (s2 < p_max)) && begin == nullptr)
+ begin = p;
- if (((selection->x1 > p->xMin) ||
- (selection->x2 > p->xMin)) && (begin != nullptr)) {
+ if (((s1 > p_min) || (s2 > p_min)) && begin != nullptr) {
end = p->next;
current = p;
}
} else {
- if ((selection->x1 > p->xMin) ||
- (selection->x2 > p->xMin))
- if (begin == nullptr)
- begin = p;
+ if (((s1 > p_min) || (s2 > p_min)) && begin == nullptr)
+ begin = p;
- if (((selection->x1 < p->xMax) ||
- (selection->x2 < p->xMax)) && (begin != nullptr)) {
+ if (((s1 < p_max) || (s2 < p_max)) && begin != nullptr) {
end = p->next;
current = p;
}
@@ -4650,23 +4740,42 @@ void TextLine::visitSelection(TextSelectionVisitor *visitor,
child_selection = *selection;
if (style == selectionStyleWord) {
- child_selection.x1 = begin ? begin->xMin : xMin;
- if (end && end->xMax != -1) {
- child_selection.x2 = current->xMax;
+ if (rot == 0 || rot == 2) {
+ child_selection.x1 = begin ? begin->xMin : xMin;
+ if (end && end->xMax != -1) {
+ child_selection.x2 = current->xMax;
+ } else {
+ child_selection.x2 = xMax;
+ }
} else {
- child_selection.x2 = xMax;
+ child_selection.y1 = begin ? begin->yMin : yMin;
+ if (end && end->yMax != -1) {
+ child_selection.y2 = current->yMax;
+ } else {
+ child_selection.y2 = yMax;
+ }
}
}
+ if (rot == 0 || rot == 2) {
+ s1 = child_selection.x1;
+ s2 = child_selection.x2;
+ } else {
+ s1 = child_selection.y1;
+ s2 = child_selection.y2;
+ }
+
edge_begin = len;
edge_end = 0;
for (i = 0; i < len; i++) {
double mid = (edge[i] + edge[i + 1]) / 2;
- if (child_selection.x1 < mid || child_selection.x2 < mid)
- if (i < edge_begin)
- edge_begin = i;
- if (mid < child_selection.x2 || mid < child_selection.x1)
- edge_end = i + 1;
+ if (XBetweenAB (mid, s1, s2))
+ {
+ if (i < edge_begin)
+ edge_begin = i;
+
+ edge_end = i + 1;
+ }
}
/* Skip empty selection. */
--
1.8.4.2
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