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diff --git a/xfa_test/pdf/pdfium/pdfium_page.cc b/xfa_test/pdf/pdfium/pdfium_page.cc
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+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/pdfium/pdfium_page.h"
+
+#include <math.h>
+
+#include "base/logging.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
+#include "pdf/pdfium/pdfium_engine.h"
+
+// Used when doing hit detection.
+#define kTolerance 20.0
+
+// Dictionary Value key names for returning the accessible page content as JSON.
+const char kPageWidth[] = "width";
+const char kPageHeight[] = "height";
+const char kPageTextBox[] = "textBox";
+const char kTextBoxLeft[] = "left";
+const char kTextBoxTop[] = "top";
+const char kTextBoxWidth[] = "width";
+const char kTextBoxHeight[] = "height";
+const char kTextBoxFontSize[] = "fontSize";
+const char kTextBoxNodes[] = "textNodes";
+const char kTextNodeType[] = "type";
+const char kTextNodeText[] = "text";
+const char kTextNodeURL[] = "url";
+const char kTextNodeTypeText[] = "text";
+const char kTextNodeTypeURL[] = "url";
+const char kDocLinkURLPrefix[] = "#page";
+
+namespace chrome_pdf {
+
+PDFiumPage::PDFiumPage(PDFiumEngine* engine,
+ int i,
+ const pp::Rect& r,
+ bool available)
+ : engine_(engine),
+ page_(NULL),
+ text_page_(NULL),
+ index_(i),
+ rect_(r),
+ calculated_links_(false),
+ available_(available) {
+}
+
+PDFiumPage::~PDFiumPage() {
+}
+
+void PDFiumPage::Unload() {
+ if (text_page_) {
+ FPDFText_ClosePage(text_page_);
+ text_page_ = NULL;
+ }
+
+ if (page_) {
+ if (engine_->form()) {
+ FORM_OnBeforeClosePage(page_, engine_->form());
+ }
+ FPDF_ClosePage(page_);
+ page_ = NULL;
+ }
+}
+
+FPDF_PAGE PDFiumPage::GetPage() {
+ ScopedUnsupportedFeature scoped_unsupported_feature(engine_);
+ if (!available_)
+ return NULL;
+ if (!page_) {
+ page_ = FPDF_LoadPage(engine_->doc(), index_);
+ if (page_ && engine_->form()) {
+ FORM_OnAfterLoadPage(page_, engine_->form());
+ }
+ }
+ return page_;
+}
+
+FPDF_PAGE PDFiumPage::GetPrintPage() {
+ ScopedUnsupportedFeature scoped_unsupported_feature(engine_);
+ if (!available_)
+ return NULL;
+ if (!page_)
+ page_ = FPDF_LoadPage(engine_->doc(), index_);
+ return page_;
+}
+
+void PDFiumPage::ClosePrintPage() {
+ if (page_) {
+ FPDF_ClosePage(page_);
+ page_ = NULL;
+ }
+}
+
+FPDF_TEXTPAGE PDFiumPage::GetTextPage() {
+ if (!available_)
+ return NULL;
+ if (!text_page_)
+ text_page_ = FPDFText_LoadPage(GetPage());
+ return text_page_;
+}
+
+base::Value* PDFiumPage::GetAccessibleContentAsValue(int rotation) {
+ base::DictionaryValue* node = new base::DictionaryValue();
+
+ if (!available_)
+ return node;
+
+ double width = FPDF_GetPageWidth(GetPage());
+ double height = FPDF_GetPageHeight(GetPage());
+
+ base::ListValue* text = new base::ListValue();
+ int box_count = FPDFText_CountRects(GetTextPage(), 0, GetCharCount());
+ for (int i = 0; i < box_count; i++) {
+ double left, top, right, bottom;
+ FPDFText_GetRect(GetTextPage(), i, &left, &top, &right, &bottom);
+ text->Append(
+ GetTextBoxAsValue(height, left, top, right, bottom, rotation));
+ }
+
+ node->SetDouble(kPageWidth, width);
+ node->SetDouble(kPageHeight, height);
+ node->Set(kPageTextBox, text); // Takes ownership of |text|
+
+ return node;
+}
+
+base::Value* PDFiumPage::GetTextBoxAsValue(double page_height,
+ double left, double top,
+ double right, double bottom,
+ int rotation) {
+ base::string16 text_utf16;
+ int char_count =
+ FPDFText_GetBoundedText(GetTextPage(), left, top, right, bottom, NULL, 0);
+ if (char_count > 0) {
+ unsigned short* data = reinterpret_cast<unsigned short*>(
+ WriteInto(&text_utf16, char_count + 1));
+ FPDFText_GetBoundedText(GetTextPage(),
+ left, top, right, bottom,
+ data, char_count);
+ }
+ std::string text_utf8 = base::UTF16ToUTF8(text_utf16);
+
+ FPDF_LINK link = FPDFLink_GetLinkAtPoint(GetPage(), left, top);
+ Area area;
+ std::vector<LinkTarget> targets;
+ if (link) {
+ targets.push_back(LinkTarget());
+ area = GetLinkTarget(link, &targets[0]);
+ } else {
+ pp::Rect rect(
+ PageToScreen(pp::Point(), 1.0, left, top, right, bottom, rotation));
+ GetLinks(rect, &targets);
+ area = targets.size() == 0 ? TEXT_AREA : WEBLINK_AREA;
+ }
+
+ int char_index = FPDFText_GetCharIndexAtPos(GetTextPage(), left, top,
+ kTolerance, kTolerance);
+ double font_size = FPDFText_GetFontSize(GetTextPage(), char_index);
+
+ base::DictionaryValue* node = new base::DictionaryValue();
+ node->SetDouble(kTextBoxLeft, left);
+ node->SetDouble(kTextBoxTop, page_height - top);
+ node->SetDouble(kTextBoxWidth, right - left);
+ node->SetDouble(kTextBoxHeight, top - bottom);
+ node->SetDouble(kTextBoxFontSize, font_size);
+
+ base::ListValue* text_nodes = new base::ListValue();
+
+ if (area == DOCLINK_AREA) {
+ std::string url = kDocLinkURLPrefix + base::IntToString(targets[0].page);
+ text_nodes->Append(CreateURLNode(text_utf8, url));
+ } else if (area == WEBLINK_AREA && link) {
+ text_nodes->Append(CreateURLNode(text_utf8, targets[0].url));
+ } else if (area == WEBLINK_AREA && !link) {
+ size_t start = 0;
+ for (size_t i = 0; i < targets.size(); ++i) {
+ // Remove the extra NULL character at end.
+ // Otherwise, find() will not return any matches.
+ if (targets[i].url.size() > 0 &&
+ targets[i].url[targets[i].url.size() - 1] == '\0') {
+ targets[i].url.resize(targets[i].url.size() - 1);
+ }
+ // There should only ever be one NULL character
+ DCHECK(targets[i].url[targets[i].url.size() - 1] != '\0');
+
+ // PDFium may change the case of generated links.
+ std::string lowerCaseURL = base::StringToLowerASCII(targets[i].url);
+ std::string lowerCaseText = base::StringToLowerASCII(text_utf8);
+ size_t pos = lowerCaseText.find(lowerCaseURL, start);
+ size_t length = targets[i].url.size();
+ if (pos == std::string::npos) {
+ // Check if the link is a "mailto:" URL
+ if (lowerCaseURL.compare(0, 7, "mailto:") == 0) {
+ pos = lowerCaseText.find(lowerCaseURL.substr(7), start);
+ length -= 7;
+ }
+
+ if (pos == std::string::npos) {
+ // No match has been found. This should never happen.
+ continue;
+ }
+ }
+
+ std::string before_text = text_utf8.substr(start, pos - start);
+ if (before_text.size() > 0)
+ text_nodes->Append(CreateTextNode(before_text));
+ std::string link_text = text_utf8.substr(pos, length);
+ text_nodes->Append(CreateURLNode(link_text, targets[i].url));
+
+ start = pos + length;
+ }
+ std::string before_text = text_utf8.substr(start);
+ if (before_text.size() > 0)
+ text_nodes->Append(CreateTextNode(before_text));
+ } else {
+ text_nodes->Append(CreateTextNode(text_utf8));
+ }
+
+ node->Set(kTextBoxNodes, text_nodes); // Takes ownership of |text_nodes|.
+ return node;
+}
+
+base::Value* PDFiumPage::CreateTextNode(std::string text) {
+ base::DictionaryValue* node = new base::DictionaryValue();
+ node->SetString(kTextNodeType, kTextNodeTypeText);
+ node->SetString(kTextNodeText, text);
+ return node;
+}
+
+base::Value* PDFiumPage::CreateURLNode(std::string text, std::string url) {
+ base::DictionaryValue* node = new base::DictionaryValue();
+ node->SetString(kTextNodeType, kTextNodeTypeURL);
+ node->SetString(kTextNodeText, text);
+ node->SetString(kTextNodeURL, url);
+ return node;
+}
+
+PDFiumPage::Area PDFiumPage::GetCharIndex(const pp::Point& point,
+ int rotation,
+ int* char_index,
+ LinkTarget* target) {
+ if (!available_)
+ return NONSELECTABLE_AREA;
+ pp::Point point2 = point - rect_.point();
+ double new_x, new_y;
+ FPDF_DeviceToPage(GetPage(), 0, 0, rect_.width(), rect_.height(),
+ rotation, point2.x(), point2.y(), &new_x, &new_y);
+
+ int rv = FPDFText_GetCharIndexAtPos(
+ GetTextPage(), new_x, new_y, kTolerance, kTolerance);
+ *char_index = rv;
+
+ FPDF_LINK link = FPDFLink_GetLinkAtPoint(GetPage(), new_x, new_y);
+ if (link) {
+ // We don't handle all possible link types of the PDF. For example,
+ // launch actions, cross-document links, etc.
+ // In that case, GetLinkTarget() will return NONSELECTABLE_AREA
+ // and we should proceed with area detection.
+ PDFiumPage::Area area = GetLinkTarget(link, target);
+ if (area != PDFiumPage::NONSELECTABLE_AREA)
+ return area;
+ }
+
+ if (rv < 0)
+ return NONSELECTABLE_AREA;
+
+ return GetLink(*char_index, target) != -1 ? WEBLINK_AREA : TEXT_AREA;
+}
+
+base::char16 PDFiumPage::GetCharAtIndex(int index) {
+ if (!available_)
+ return L'\0';
+ return static_cast<base::char16>(FPDFText_GetUnicode(GetTextPage(), index));
+}
+
+int PDFiumPage::GetCharCount() {
+ if (!available_)
+ return 0;
+ return FPDFText_CountChars(GetTextPage());
+}
+
+PDFiumPage::Area PDFiumPage::GetLinkTarget(
+ FPDF_LINK link, PDFiumPage::LinkTarget* target) {
+ FPDF_DEST dest = FPDFLink_GetDest(engine_->doc(), link);
+ if (dest != NULL)
+ return GetDestinationTarget(dest, target);
+
+ FPDF_ACTION action = FPDFLink_GetAction(link);
+ if (action) {
+ switch (FPDFAction_GetType(action)) {
+ case PDFACTION_GOTO: {
+ FPDF_DEST dest = FPDFAction_GetDest(engine_->doc(), action);
+ if (dest)
+ return GetDestinationTarget(dest, target);
+ // TODO(gene): We don't fully support all types of the in-document
+ // links. Need to implement that. There is a bug to track that:
+ // http://code.google.com/p/chromium/issues/detail?id=55776
+ } break;
+ case PDFACTION_URI: {
+ if (target) {
+ size_t buffer_size =
+ FPDFAction_GetURIPath(engine_->doc(), action, NULL, 0);
+ if (buffer_size > 1) {
+ void* data = WriteInto(&target->url, buffer_size + 1);
+ FPDFAction_GetURIPath(engine_->doc(), action, data, buffer_size);
+ }
+ }
+ return WEBLINK_AREA;
+ } break;
+ // TODO(gene): We don't support PDFACTION_REMOTEGOTO and PDFACTION_LAUNCH
+ // at the moment.
+ }
+ }
+
+ return NONSELECTABLE_AREA;
+}
+
+PDFiumPage::Area PDFiumPage::GetDestinationTarget(
+ FPDF_DEST destination, PDFiumPage::LinkTarget* target) {
+ int page_index = FPDFDest_GetPageIndex(engine_->doc(), destination);
+ if (target) {
+ target->page = page_index;
+ }
+ return DOCLINK_AREA;
+}
+
+int PDFiumPage::GetLink(int char_index, PDFiumPage::LinkTarget* target) {
+ if (!available_)
+ return -1;
+
+ CalculateLinks();
+
+ // Get the bounding box of the rect again, since it might have moved because
+ // of the tolerance above.
+ double left, right, bottom, top;
+ FPDFText_GetCharBox(GetTextPage(), char_index, &left, &right, &bottom, &top);
+
+ pp::Point origin(
+ PageToScreen(pp::Point(), 1.0, left, top, right, bottom, 0).point());
+ for (size_t i = 0; i < links_.size(); ++i) {
+ for (size_t j = 0; j < links_[i].rects.size(); ++j) {
+ if (links_[i].rects[j].Contains(origin)) {
+ if (target)
+ target->url = links_[i].url;
+ return i;
+ }
+ }
+ }
+ return -1;
+}
+
+std::vector<int> PDFiumPage::GetLinks(pp::Rect text_area,
+ std::vector<LinkTarget>* targets) {
+ if (!available_)
+ return std::vector<int>();
+
+ CalculateLinks();
+
+ std::vector<int> links;
+
+ for (size_t i = 0; i < links_.size(); ++i) {
+ for (size_t j = 0; j < links_[i].rects.size(); ++j) {
+ if (links_[i].rects[j].Intersects(text_area)) {
+ if (targets) {
+ LinkTarget target;
+ target.url = links_[i].url;
+ targets->push_back(target);
+ }
+ links.push_back(i);
+ }
+ }
+ }
+ return links;
+}
+
+void PDFiumPage::CalculateLinks() {
+ if (calculated_links_)
+ return;
+
+ calculated_links_ = true;
+ FPDF_PAGELINK links = FPDFLink_LoadWebLinks(GetTextPage());
+ int count = FPDFLink_CountWebLinks(links);
+ for (int i = 0; i < count; ++i) {
+ base::string16 url;
+ int url_length = FPDFLink_GetURL(links, i, NULL, 0);
+ if (url_length > 1) { // WriteInto needs at least 2 characters.
+ unsigned short* data =
+ reinterpret_cast<unsigned short*>(WriteInto(&url, url_length + 1));
+ FPDFLink_GetURL(links, i, data, url_length);
+ }
+ Link link;
+ link.url = base::UTF16ToUTF8(url);
+
+ // If the link cannot be converted to a pp::Var, then it is not possible to
+ // pass it to JS. In this case, ignore the link like other PDF viewers.
+ // See http://crbug.com/312882 for an example.
+ pp::Var link_var(link.url);
+ if (!link_var.is_string())
+ continue;
+
+ // Make sure all the characters in the URL are valid per RFC 1738.
+ // http://crbug.com/340326 has a sample bad PDF.
+ // GURL does not work correctly, e.g. it just strips \t \r \n.
+ bool is_invalid_url = false;
+ for (size_t j = 0; j < link.url.length(); ++j) {
+ // Control characters are not allowed.
+ // 0x7F is also a control character.
+ // 0x80 and above are not in US-ASCII.
+ if (link.url[j] < ' ' || link.url[j] >= '\x7F') {
+ is_invalid_url = true;
+ break;
+ }
+ }
+ if (is_invalid_url)
+ continue;
+
+ int rect_count = FPDFLink_CountRects(links, i);
+ for (int j = 0; j < rect_count; ++j) {
+ double left, top, right, bottom;
+ FPDFLink_GetRect(links, i, j, &left, &top, &right, &bottom);
+ link.rects.push_back(
+ PageToScreen(pp::Point(), 1.0, left, top, right, bottom, 0));
+ }
+ links_.push_back(link);
+ }
+ FPDFLink_CloseWebLinks(links);
+}
+
+pp::Rect PDFiumPage::PageToScreen(const pp::Point& offset,
+ double zoom,
+ double left,
+ double top,
+ double right,
+ double bottom,
+ int rotation) {
+ if (!available_)
+ return pp::Rect();
+
+ int new_left, new_top, new_right, new_bottom;
+ FPDF_PageToDevice(
+ page_,
+ static_cast<int>((rect_.x() - offset.x()) * zoom),
+ static_cast<int>((rect_.y() - offset.y()) * zoom),
+ static_cast<int>(ceil(rect_.width() * zoom)),
+ static_cast<int>(ceil(rect_.height() * zoom)),
+ rotation, left, top, &new_left, &new_top);
+ FPDF_PageToDevice(
+ page_,
+ static_cast<int>((rect_.x() - offset.x()) * zoom),
+ static_cast<int>((rect_.y() - offset.y()) * zoom),
+ static_cast<int>(ceil(rect_.width() * zoom)),
+ static_cast<int>(ceil(rect_.height() * zoom)),
+ rotation, right, bottom, &new_right, &new_bottom);
+
+ // If the PDF is rotated, the horizontal/vertical coordinates could be
+ // flipped. See
+ // http://www.netl.doe.gov/publications/proceedings/03/ubc/presentations/Goeckner-pres.pdf
+ if (new_right < new_left)
+ std::swap(new_right, new_left);
+ if (new_bottom < new_top)
+ std::swap(new_bottom, new_top);
+
+ return pp::Rect(
+ new_left, new_top, new_right - new_left + 1, new_bottom - new_top + 1);
+}
+
+PDFiumPage::Link::Link() {
+}
+
+PDFiumPage::Link::~Link() {
+}
+
+} // namespace chrome_pdf
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