summaryrefslogtreecommitdiff
path: root/xfa_test/pdf/pdfium/pdfium_page.cc
diff options
context:
space:
mode:
Diffstat (limited to 'xfa_test/pdf/pdfium/pdfium_page.cc')
-rw-r--r--xfa_test/pdf/pdfium/pdfium_page.cc477
1 files changed, 0 insertions, 477 deletions
diff --git a/xfa_test/pdf/pdfium/pdfium_page.cc b/xfa_test/pdf/pdfium/pdfium_page.cc
deleted file mode 100644
index d8a5dce5a2..0000000000
--- a/xfa_test/pdf/pdfium/pdfium_page.cc
+++ /dev/null
@@ -1,477 +0,0 @@
-// 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
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-14 17:39:50 +0000